Hydrobloc system - Series K Hydraulic control valves - General · The Hydrobloc valve opens. • If...

Hydrobloc system - Series KHydraulic control valves - General

2 BAYARD - The Hydrobloc system - K Series - T12003B-EN

This manual describes the Hydrobloc system as a whole, and supplements the specific function data sheets.

The Hydrobloc systemBasic main valves

The Hydrobloc system General Description Operation

3 4 5-6

Specifications Range Overall dimensions and weight Parts lists

7 8 9-13

Functions and applications List of functions and applications Pressure control Flow control Level control Pumping station control Electric control Network control

14-15 16 17 18-19 20-21 21 22-23

Options On the main valve On the pilot circuit

24-25 25

Establishing a project Selection criteria Hydrosize Sizing Software Operating ranges Options specific to the operating conditions Installation - fitting

26 27 28-30 31 32-35

Water distribution networks

Water conveyance

Hydroelectric plants

Irrigation networks

Water treatment

Fire protection

Gas networks

Sewage networks

Service connections

Industrial applications

Contents

BAYARD - The Hydrobloc system - K Series - T12003B-EN 3

The Hydrobloc system is a combination of a main Hydrobloc valve and specific, scalable pilot circuits (Fig. I). • This servo-operated hydraulic valve, controlled by one or more appropriate

devices, can be used for pressure, flow, level and pumping station control.• Several functions can be combined to achieve numerous applications.• It is particularly suitable for use in: - Drinking water networks, - Industrial or fire fighting water networks, - Screened raw water (2 mm) for irrigation, - Drinking water treatment plants.• PN 10, 16 or 25 bar depending on the application (PN 40 bar, please consult us).• DN 32 threaded G 1’’¼ and DN 40 threaded G 1’’½, DN 40 to 1000 with standard

flanges.• Operating temperatures of +1 °C to +65 °C.• Specific pilot circuits can be changed as required, without changing the main

valve (Fig. I). • Slotted cylinder anti-cavitation kit available as an option.• Low Flow Stabiliser (LFS), seat, valve disc guide, valve disc and valve disc plate

shape profiling: accurate adjustment guaranteed regardless of valve opening percentage.

• Watertight at zero flow.• Valve opening speed and/or closing speed controller fitted as standard.• Standard horizontal installation; for vertical installation, please consult us.• Pilot circuit installed on right bank as standard, left bank on request.• Supplied with pressure gauge isolating valves (pressure gauges optional).• Numerous options available: - On the main valve (see page 24). - On the pilot circuit (see page 15).• Easy to install and maintain.• Annual maintenance can be performed without switching off water supply;

tri-annual in-depth maintenance can be performed without dismantling pipe.

The Hydrobloc system - General

Fig. I

Compliance with standards:

• NF EN 1074-5.

• Sealing Class A in accordance with

ISO 5208-2.

• Compliant with EN 12266.

• Face-to-face dimensions NF EN 558-1

Series 1 and ISO 5752-1

Series 1 (excluding DN 1000).

• Flange drilling in accordance with EN 1092-2

and ISO 7005-2: ISO PN10 as standard, ISO

PN 16, 25 or other drillings for DN 50 to 1000

(please consult us).

• French Sanitary Compliance Certificate

(A.C.S.)

+ Functions

+ Options

Main valveControl valve Pilot circuit= +

CAN BE CHANGED

OVER THE

NETWORK’S

SERVICE LIFE


The Hydrobloc system - Description

Hydraulically-controlled valve operating under the force of the fluid flowing through it.

LFS profiling

01

02

05

07

06

03

Fig. I• The valve comprises (Fig. I): - a body (01). - a bonnet (03). - a mobile unit (04).• Modern design.• Simple construction.• Rugged.• Reliable operation, low maintenance.• Can be dismantled from above.• Maintenance possible without dismantling

pipe.• Made in France.• Ductile iron body and bonnet.• Internal/external corrosion protection through

full cataphoresis and powder epoxy coating.• Low Flow Stabiliser (LFS), seat, valve disc

guide, valve disc and valve disc plate shape profiled by hydraulic modelling (Fig. II)**.

• Stainless steel seat on all DNs (02).• Stainless steel bolting, tubes and fittings.• Self-lubricating mobile unit guide (05).• Visual position indicator fitted with manual

vent (06).• Drain plug for frost protection (07) and

maintenance.• Numerous options available on the main valve

(see section entitled Main valve options).

* Valid subject to specification, operating and maintenance conditions recommended by Bayard.

** Up to DN 150 XG or DN 200 XGS.

Fig. II

04


The Hydrobloc system - Operation

• The main valve comprises (Fig. III): - a body (01) separated into two sections by an open partition (02). - a bonnet (03). - a mobile unit (04).The partition (02) and the mobile unit diaphragm (04) define three separate areas: upstream (A), downstream(B) and operating chamber (C).• The Hydrobloc valve uses the motive force of the water entering the operating

chamber (C).• The valve opens as a result of the following equation: The force that lifts the mobile unit (yellow and orange arrows) is higher than

the force pushing it downwards (purple arrows) + the weight of the mobile unit + the action of the chamber spring.

• The valve closes as a result of the reverse equation: The downward force (purple arrows) + the weight of the mobile unit + the

action of the chamber spring is higher than the force lifting the mobile unit.• By default, if there is zero flow in the valve, the pressure in zones A and B

is almost identical. The forces shown by the arrows cancel each other out. Only the weight of the mobile unit and the downward action of the spring remain. The valve therefore closes naturally.

• For satisfactory operation, the Hydrobloc valve needs flow through it and therefore a pressure difference between the valve intake and output.

• The constant opposition of all of these forces under and on the mobile unit gives this type of valve high performance levels with very little energy input, for accurate adjustment and immediate readjustment in response to hydraulic variations in the network.

A B

C

Fig. III Fig. IV

Hydraulic engineer’s comments:The pressure differential through the valve is the real motive force of the Hydrobloc valve.If there is no differential, the valve closes. The Hydrobloc valve therefore needs a

minimum pressure difference between the upstream and downstream sides in order to open.This difference is small (0.3 b for the single-chamber model). Using the double chamber model enables

satisfactory operation with even smaller differentials.The multi-functional Hydrobloc system offers accurate adjustment, flexible adaptation and high performance levels that require very little energy input.

0201 0403


The Hydrobloc system - Operation

1.4 How a control valve works

• The Hydrobloc valve comprises: - a main valve. - a connection circuit linking the upstream pressure zone (A) to the

chamber (C) and the chamber (C) to the downstream pressure zone (B). - a three-way valve (V) is used to control these connections:

• The Hydrobloc control valve comprises: - a main valve. - a control pilot circuit adapted to the required function(s).• The pilot circuit comprises: - an orifice plate (O) on the upstream pipe with a constant fixed-diameter

orifice much smaller than the pipe. - a pilot (P) on the downstream pipe that acts as a variable-diameter

orifice.• The chamber is connected to the pilot circuit at the mid-point (M).• The chamber is supplied via a fixed area, the constant orifice plate (O).• At the same time, it drains via a variable orifice plate, the pilot (P).• The valve regulates when the water passes through the valve body,

but mainly when the water enters and leaves the valve chamber via the mid-point (M).

• As the intake orifice plate (O) is fixed, the pilot (P) opens or closes the Hydrobloc valve.

• If the valve area of the water in the pilot (P) is greater than that of the orifice plate (O), the water leaves the chamber. The Hydrobloc valve opens.

• If the valve area of the water in the pilot (P) is less than that of the orifice plate (O), the water enters the chamber. The Hydrobloc valve closes.

• If the valve area of the water in the pilot (P) is equal to that of the orifice plate (O), the water enters and leaves the chamber equally. The Hydrobloc valve neither opens nor closes. It regulates.

• From the upstream zone to the chamber:

1. The valve (V) lets water into the chamber (C), which fills up due to the upstream pressure.

2. The forces pushing the mobile unit downwards are strongest.

Conclusion: “to close a Hydrobloc valve, the chamber must be filled”.

• From the chamber to the downstream zone:

1. The valve (V) stops the water from entering the chamber (C). It lets the water flow out of the chamber (C). It drains to the lower downstream pressure (B).

2. The forces pushing the mobile unit upwards are strongest.

Conclusion: “to open a Hydrobloc valve, the chamber must be drained”.

• Or isolate the chamber: 1. The valve (V) stops the water

from entering or leaving the chamber (C). The operating chamber is locked.

2. This means that the forces cannot vary.

Conclusion: “to maintain the Hydrobloc valve in intermediate position, water quantity in chamber must be unchanged“.

The valve reproduces the movements

of the pilot circuit:

- The pilot closes: the valve closes.

- The pilot opens: the valve opens.

- The pilot regulates: the valve regulates.

A B

V V V

C

Fig. V Fig. VI Fig. VII

Closed Open Locked

C C

A ABB

Fig. VIII

P

M

O

A B

C


The Hydrobloc system - Range

Standard XGS valveDesigned for high performance in all situations, it can be used for most functions; this is the widest diameter range. It is particularly suitable for large pressure differentials, and minimises the risk of cavitation (replaces the LG range). - DN 40 to 1000

Double chamber XG valveThis design eliminates the head loss necessary for valve operation. It is particularly suitable for pumping station control. - DN 65 to 400

High flow XG valveRecommended in situations in which there is little energy to be dissipated, particularly with functions requiring flow control. This valve generates very little head loss. - DN 32 threaded G1’’1/4 - DN 40 threaded G1’’1/2 - DN 50 to 800

XGA angle valveThis compact design is particularly suitable for pumping station operating safety systems and open filter regulation. - DN 50 to 300

Double chamber XGA valveThis design eliminates the head loss necessary for valve operation. It is particularly suitable for pumping station operating safety systems.- DN 65 to 300


The Hydrobloc system - Overall dimensions and weight

3. Overall dimensions and weight

A1

A2

C

Single chamber

Double chamber

ø B

H

A

XGA main valve with angle body

DN A1mmA2

mmB

mmC

mmH

mmWeight* kg

Single chamberWeight* kg

Double chamber50 XGA 125 125 173 212 - 11.6 -65 XGA 145 145 198 232 83 15.4 27.180 XGA 155 155 226 244 82 19.2 33.6

100 XGA 175 175 265 264 91 31.1 45.1150 XGA 225 225 351 380 100 69.4 99.6200 XGA 275 275 436 480 117 103.5 135.2250 XGA 325 325 524 529 125 143.7 209.8300 XGA 400 300 606 571 125 241.1 319.6

Depending on the valve type, the pilot circuit may exceed the overall dimensions of the main valve.* Double chamber XGS valve, please consult us.** Some functions require the addition of an orifice plate flange. Please refer to the relevant technical manuals for the face-to-face dimension.*** Bare valve weight.

* Bare valve weight

XGS and XG main valve with straight body

H

ø BC

D

Single chamber

Double chamber (XG model)*

XGS Model XG Model Weight***Kg

DN A**mmB

mmC

mmD

mmWeight***

kg B

mmC

mmD

mmH

mm

Single chamber

Double chamber

32 1“1/4 180 - - - - 150 200 33 - 5.3 -32 1“1/2 200 - - - - 150 200 33 - 5.4 -

50 230 145 195 80 10.2 173 238 84.5 - 12.1 -65 290 173 230 95 15 198 257 94.5 83 16.6 26.080 310 198 250 102 19.8 226 277 102 82 20.4 31.5

100 350 226 270 120 27.1 265 302 120 91 32.2 46.5125 400 226 290 138 38.5 307 396 137 103.5 40.5 60.9150 480 226 290 153 45.7 351 443 152 100 64.9 94.8200 600 351 443 182 78.8 436 567 182 117 115 146.4250 730 436 580 212 132.7 524 609 212 125 153.5 219.6300 850 524 631 242 192.1 606 657 242 125 217.1 295.3350 980 606 657 278 247.4 - - - - - -400 1100 606 657 312 268.4 835 847 355 194.5 481 714500 1250 835 847 367 540 - - - - - -600 1450 835 847 422.5 708 1085 1229 422.5 - 1205 -700 1650 1085 1229 480 1415 - - - - - -800 1850 Please consult us - 1355 1407 512.5 - 2050 -900 2050 1355 1407 562.5 2322 Please consult us

1000 Please consult us Please consult us


The Hydrobloc system - XG threaded model parts lists

Item Part name No. Materials Standards

01 Body 1 Cast iron/EN-JS1040 or EN-JS1050 NF EN 1563

02 Mobile unit s/assy Item. 07-08-09-11-14-15-16-17-19 1

03 Seat 1 Stainless steel/1.4401 NF EN 10088

04 Bonnet 1 Cast iron/EN-JS1040 or EN-JS1050 NF EN 1563

05 Guide 1 Bronze/CC483K NF EN 1982

06 Position indicator s/assy 1

07 Spring 1 Stainless steel/1.4310 NF EN 10088

08 Resilient valve disc 1 EPDM

09 Diaphragm 1 EPDM or NBR (depending on DN)

10 Seat O-ring 1 EPDM

11 Stem O-ring 2 EPDM

12 Screw 8 Stainless steel/1.4307 NF EN 10088 - NF EN ISO 3506

13 Washer 8 Stainless steel/1.4307 NF EN 10088 - NF EN ISO 3506

14 Stem 1 Stainless steel/1.4401 NF EN 10088 - NF EN ISO 3506

15 Valve disc fastener 1 Stainless steel/1.4401 NF EN 10088 - NF EN ISO 3506

16 Valve disc holder 1 Stainless steel/1.4401 NF EN 10088 - NF EN ISO 3506

17 Upper diaphragm holder 1 Stainless steel/1.4401 NF EN 10088 - NF EN ISO 3506

18 Drain plug 1 Stainless steel/1.4401 NF EN 10088 - NF EN ISO 3506

19 Nut 1 Stainless steel/1.4401 NF EN 10088 - NF EN ISO 3506

12

05

04

13

10

01

18

03

07

06

17

11

09

16

08

14

15

19

02

A maintenance kit containing items 07-08-09-10-11 is available to order.


The Hydrobloc system - XGS flanged model parts lists

12

05

06

04

03

01

20

21

07

14

19

18

09

11

17

08

16

02

15



02 Mobile unit s/assy Item. 07-08-09-11-14-15-16-17-18-19 1






08 Resilient valve disc 1 EPDM -

09 Diaphragm 1 EPDM or NBR (depending on DN) -

10 Seat O-ring 1 EPDM -

11 Stem O-ring 2 EPDM -

12 Screw (quantities depending on DN) 1 set Stainless steel/1.4307 NF EN 10088 - NF EN ISO 3506

13 Washer (quantities depending on DN) 1 set Stainless steel/1.4307 NF EN 10088 - NF EN ISO 3506


15 StemDN 65 to 150 XGSDN 50 XGS

1Stainless steel/1.4307 Stainless steel/1.4401

NF EN 10088 - NF EN ISO 3506


17 Valve disc holder DN 65 to 150 XGSDN 50 XGS

1Cast iron/EN-JS1040 Stainless steel/1.4401

NF EN 1563 - NF EN 10088 NF EN ISO 3506

18Upper diaphragm holder

DN 65 to 150 XGSDN 50 XGS

1Cast iron/EN-JS1040 Stainless steel/1.4401

NF EN 1563 - NF EN 10088 NF EN ISO 3506

19 Washer DN 65 to 150 XGS 1 Stainless steel/1.4307 NF EN 10088 - NF EN ISO 3506

20 Centring pin DN 65 to 150 XGS 2 Stainless steel/1.4307 NF EN 10088 - NF EN ISO 3506

21 Drain plug 1 Stainless steel/1.4401 NF EN 10088 - NF EN ISO 3506

A maintenance kit containing items 07-08-09-10-11-14-19 is available to order.

13

10


The Hydrobloc system - XG flanged model parts lists



02 Mobile unit s/assy Item. 07-08-09-11-14-15-16-17-18 1















17 Valve disc holder 1 Cast iron/EN-JS1040 NF EN 1563

18 Upper diaphragm holder 1 Cast iron/EN-JS1040 NF EN 1563

19 Centring pin 2 Stainless steel/1.4307 NF EN 10088 - NF EN ISO 3506

20 Seat screw DN 200 to 350 8 Stainless steel/1.4307 NF EN 10088 - NF EN ISO 3506

21 Drain plug G.1/2" 1 Stainless steel/1.4401 NF EN 10088 - NF EN ISO 3506

13

12

05

06

19

01

21

07

14

18

09

11

17

08

16

1520

DN 200 upwards

02

A maintenance kit containing items 07-08-09-10-11-14 is available to order.

04

10

03


The Hydrobloc systemXG flanged double chamber model parts lists



02 Mobile unit s/assy Item. 09+10+11+16+19+20+21+22+23+24 1



05Guide DN 65 to 350 - Guide + end piece DN 400 and 500

1 Bronze/CC483K NF EN 1982


07 Spacer s/assyDN 65 to 150DN 200 to 500

1Cast iron/EN-JL1040 Cast iron/EN-JS1040

NF EN 1561 - NF EN 1563

08 Lower guide 1 Bronze/CC483K NF EN 1982




12 Body/spacer O-ring 2 EPDM


14 Lower guide/spacer O-ring 3 EPDM

15 Lower guide/stem O-ring1 set

EPDM

16 Stem O-ring1 set

EPDM

17 Screw (DN 65 to 350) - Stud DN 400 2 Stainless steel/1.4307 NF EN 10088 - NF EN ISO 3506

18 Washer (DN 65 to 350) - Bolting (nuts + washers) DN 400 1 Stainless steel/1.4307 NF EN 10088 - NF EN ISO 3506


20 Support washer - DN 200 to 300 1 Stainless steel/1.4307

21 Valve disc holder 1 Stainless steel/1.4307 NF EN 10088 - NF EN ISO 3506

22 Stem 2 Stainless steel/1.4021 NF EN 10088

23 Valve disc fastener - DN 65 to 150 1 Stainless steel/1.4401 NF EN 10088 - NF EN ISO 3506

24 Upper diaphragm holderDN 65 to 150DN 200 to 500

1 setCast iron/EN-JL1040Cast iron/EN-JS1040

NF EN 1561 - NF EN 1563

25 Drain plug Stainless steel/1.4401 NF EN 10088 - NF EN ISO 3506

26 Seat screw Stainless steel/1.4307 NF EN 10088 - NF EN ISO 3506

25

A maintenance kit containing items 09 to 16-19-20 is available to order.

1817

06

05

04

07

01

12

08

03

13

DN 200 upwards

26

23

24

19 20

21

16

09

11

22

10

02

14

15


The Hydrobloc systemXGA flanged angle body model parts lists



02 Mobile unit s/assy Item. 7-8-9-11-14-15-16-17-18 for DN 65 to 150 1















17 Valve disc holderDN 65 to 200DN 250 to 300


NF EN 1561 - NF EN 1563

18 Upper diaphragm holderDN 65 to 150DN 200 to 300


NF EN 1561 - NF EN 1563

19 Centring pin 2 Stainless steel/1.4307 NF EN 10088 - NF EN ISO 3506

20 Seat screw DN 200 to 300 8 Stainless steel/1.4307 NF EN 10088 - NF EN ISO 3506

07

08

09

11

14

16

17

18

A maintenance kit containing items 07-08-09-10-11-14 is available to order.

15

02

10

06

05

04

12

13

19

03

01

DN 200 upwards

20


The Hydrobloc systemMost common associated functions One function Two functions Three or more functions

To control

Hydrelec on/off electric remote valve

Hydrelec step by step electric remote valve

Hydro SCADA

Pressure modulation valve

Pumping station Hydro non-return with slow opening valve

Hydro differential for booster pump valve

Hydro pump control valve

Hydro Surge anticipating valve

Hydrostab pressure sustaining/relief valve

Hydrostab pressure reducing valve

Pressure

Flow

Level

Network

Hydrostab pressure reducing non-return

function

Hydrostab slow filling pressure reducing

Hydrostab pressure reducing - return function

Hydrostab pressure reducing - solenoid-operated closing

Hydrostab two-stage pressure reducing with solenoid selection

Hydro flow limiting - pressure reducing

Hydro flow limiting - pressure sustaining

Hydro two-stage flow limiting with solenoid selection

Hydro overspeed - pressure reducing

Hydro overspeed - non-return function

Hydro altitude flow limiting

Hydro altitude pressure sustaining

Hydro altitude - electric remote control

Hydro-savy float - pressure sustaining

Hydro-savy float - flow limiting

Hydro-savy float -pressure relief

Hydro pump controlpressure sustaining

Hydro pump control pressure reducing

Hydro pressure relief and air entry/exhaust

Hydro SCADA - hydraulic safety slow filling

application

Hydro SCADA - pressure reducing safety application

Hydro flow limiting valve

Hydro overspeed valve

Hydro altitude valve

Hydro-savy float valve

Hydro-vega float valve

Hydro-RAF proportional float valve

Hydro-filter valve

Hydrostab pressure sustaining/reducing - flow

limiting

Hydrostab pressure sustaining/reducing -

electric remote

Hydrostab pressure reducing - flow limiting -

non-return function

Hydrostab slow filling pressure

sustaining/reducing

Hydro flow limiting - solenoid-controlled

closing - pressure relief

Open list. Other functions can be

achieved by combining pilots and additional accessories. Please

contact us in order to define equipment to suit your specific problem.

Hydro-altitude flow limiting - motorised - solenoid

-operated closing

Hydro-savy float - pressure sustaining/relief

Hydro pump control - two-step opening/closing

- pressure sustaining

Hydro pressure differential valve

Open list, please consult your BAYARD representative

Hydrostab pressure sustaining/reducing valve


The Hydrobloc systemAssociated applications and main options

Upstream pressure sustaining ITR KH008

PN16 protection by downstream pilot ITR KH014

Electric controlITR KE010

Small air valve kitITR KV007

Limit switchITR KV008

Time-based electric control - ITR KE027

Electric control ITR KE010 Non-return function ITR KH016 Small air valve kit ITR KV007 Time-based electric control - ITR KE026

Electric control ITR KE010 Non-return function ITR KH016

Small air valve kit ITR KV007 Twin filter circuitITR KH002

Electric controlITR KE010

Pressure sustaining/reducing function ITR KH007 + KH012

Altitude functionITR KH010

Motorised pilotITR KE016

Pilot frost protection ITR KH037

Manual controlITR KH031

Savy upstream pressure sustaining (K370) + frost protection ITR KH038

Savy flow limiting (K380) + frost protection ITR KH039

Upstream overpressure relief ITR KH006

Function

Upstream pressure sustaining ITR KH007

Upstream overpressure relief ITR KH006

2-level altitudeITR KH029

Hydrostab Pressure Reducing Valve Series K1 10

Hydrostab Pressure Sustaining/ Relief Valve Series K1 20

Hydrostab Pressure Sustaining/Reducing Valve Series K1 50

Hydro Flow Limiting Valve Series K2 10

Hydro- Savy Float Valve Series K3 20

Hydro Altitude ValveSeries K3 10

Hydro-Vega Float Valve Series K3 40



The Hydrobloc system - Pressure controlSeries K1

1. Hydrostab pressure reducing valve - Series K1 10Functions:• Reduces a higher upstream pressure to a steady lower downstream

pressure regardless of variations in flow and/or upstream pressure.• Closes and restores distribution by manual control.Sample applications:• Controlling and linking staged networks.• Supplying a low-pressure network from a high-pressure network.• Balancing supply to a gridiron system from several supplies with different

higher pressures.

2. Hydrostab pressure sustaining/relief valve - Series K1 20Functions:• Pressure sustaining: maintains a minimum pressure setpoint to sustain

a full pipe.• Pressure relief: transfers excess pressure from an upstream network to

a lower pressure downstream network, reservoir or outfall when upstream pressure exceeds the set value.

• Closes and restores distribution by manual control.Sample applications:• Maintaining a pressure setpoint (in-line mounting on pipe) in order to: - Ensure minimum pressure at a high point or to a disadvantaged service

connection. - Avoid an excessive pressure drop when supplying a reservoir and spread

reservoir filling over time. - Maintain a minimum pressure on a pump and therefore limit flow

to prevent it from working in the cavitation zone.• When a pressure setpoint is reached, relieving pressure to an outlet

(parallel mounting) in order to: - Prevent overpressure in a network when a shutoff component is closed. - Provide a minimum flow at a pump outlet to protect it from operating at

too low a flow (depending on the pump curve).

3. Hydrostab pressure sustaining/reducing valve - Series K1 50Functions:• Performs the functions of a Hydrostab pressure sustaining/relief

valve (series K1 20) or a Hydrostab pressure reducing valve (series K1 10) depending on the installation operating conditions. The pressure sustaining/relief function always takes priority.

• Closes and restores distribution by manual control.Sample applications:• Increasing supply and protecting a low-pressure network from excess

pressure from a high-pressure network, while guaranteeing a minimum pressure in the high-pressure network as a priority.

• Maintaining a minimum pressure at a pump outlet and stabilising pressure in the downstream network.

4. Hydrostab differential control valve with constant head lossFunctions:• Maintains a constant differential pressure regardless of pressure and flow

in order to balance head losses in a network.• Closes and restores distribution by manual control.Sample applications:• Balancing the filling of reservoirs located a different distances or levels

relative to the supply.

3 - A specific technical data sheet describing each function and its applications is available on request.

Hydrostab pressure reducing XGS

Hydrostab pressure sustaining/relief XGS

Hydrostab pressure sustaining/reducing XGS

Hydrostab differential XG

Series K1 10

Series K1 20

Series K1 50

XGS MODEL

RECOMMENDED

XGS MODEL

RECOMMENDED

XGS MODEL

RECOMMENDED

XG MODEL

RECOMMENDED


The Hydrobloc system - Flow controlSeries K21. Hydro flow limiting valve - Series K2 10Functions:• Limits the flow to within recommended operating limits regardless

of upstream and downstream pressures.• Closes and restores distribution by manual control.Sample applications:• Limiting flow to a reservoir, treatment plant or bulk water supply

to avoid peak flow demands and spread supply over time.• Balancing flow in a network.• Mixing water qualities.

2. Hydro overspeed valve - Series K2 20Functions:• Automatically and permanently closes in an adjustable time when water

velocity in the system exceeds the preset value, regardless of upstream and downstream pressure variations within recommended operating limits. Must be switched back on manually.

Sample applications:• Reservoir draining: saves water, guaranteeing supply after repair.• Protecting roads and railways.• Various types of damage in urban settings, etc.

3. Hydro flow limiting valve - Downstream stabiliser Series K2 50

Functions:• Limits the flow to within recommended operating limits regardless of

upstream pressure variation.• Reduces the pressure from the highest pressure upstream pipe to a steady

lower downstream pressure regardless of variations in upstream pressure.• Closes and restores distribution by manual control.Sample applications:• Limiting flow to a reservoir, treatment plant or bulk water supply to avoid

peak flow demands and spread supply over time.• Balancing flow in a network.• Mixing water qualities.• Reducing and stabilising downstream pressure to protect the supplied

network when upstream pressure becomes excessive.

Hydrostab flow limiting XG

Hydro overspeed XG

Hydrostab flow limiting Downstream stabiliser XG

Series K2 10

Series K2 20

Series K2 50XGS MODEL

RECOMMENDED

XG MODEL

RECOMMENDED

XG MODEL


The Hydrobloc system - Level controlSeries K3

1. Hydro altitude valve - Series K3 10Functions:• Gradually shuts off supply at a constant, adjustable level.• Gradually opens on a water depth of approximately 40 to 50 cm below top

level, then opens completely.• Manual closing and reopening.Sample applications:• Maintaining a reservoir supply closing level at a constant level, without

control accessories in the water (external pressure gauge isolating valve).• By-passing the reservoir for works and delivering a pressure equal to the

height of the full reservoir into the distribution network, subject to supply potential.

• Supplying and protecting sensitive installations at very low pressure.

2. Hydro-Savy float valve - Series K3 20Functions:• Closes completely at a constant, adjustable top level.• Opens completely at a constant lower level after consumption of an

adjustable water depth.• Manually controlled opening and closure as an option.Sample applications:• Controlling supply to a low-consumption reservoir to ensure water renewal.• Ensuring complete closing and opening, ideal for supplying a reservoir

from a pumping station.

3. Hydro-RAF proportional float valve - Series K3 30Functions:• Shuts off supply at an adjustable maximum level.• Controls opening proportional to variations in level up to 20 cm from

the top level or once an adjustable water depth has been consumed.• Completely opens below the proportional opening range.• Limits complete opening to maintain upstream pressure or restrict

flow.Sample applications:• Controlling the gravity supply of cascading reservoirs.• Controlling undesirable opening and closing on small reservoirs.• Controlling the level of wet wells.

4. Hydro-Vega float valve - Series K3 40Functions:• Shuts off and opens supply at a constant level controlled by float pilot.• Manual closing and reopening.Application:• Maintaining a drinking water reservoir supply opening and closing level

at a constant level.

Hydro Altitude XGS

Hydro-Savy XGS

Hydro-RAF Proportional Float XG

Series K3 10

Series K3 20

Series K3 30

Series K3 40

Hydro-Vega Float XGS - Series K3 40

XGS MODEL

RECOMMENDED

XGS MODEL

RECOMMENDED

XGS MODEL

RECOMMENDED

XGS MODEL

RECOMMENDED


The Hydrobloc system - Level controlSeries K35. Hydro-Filter valve - Series K3 35Functions:• Shuts off supply at an adjustable maximum level.• Controls opening proportional to variations in level up to 20 cm from

the top level or once an adjustable water depth has been consumed.• Completely opens below the proportional opening range.• Limits complete opening to maintain upstream pressure or restrict

flow.Sample application:• Controlling the flow through an open filter to delay clogging and increase

intervals between regeneration.

6. Hydro-Savy pressure sustaining/relief float valve Series K3 70Functions:• Closes completely at a constant, adjustable top level.• Opens at a constant lower level after consumption of an adjustable water

depth.• Pressure sustaining: maintains a minimum pressure setpoint in an

upstream network.• Pressure relief: discharges overpressure to the reservoir on closure of the

valve or when the valve is closed.• Manually controlled opening and closure as an option.Sample applications:• Controlling supply to a low-consumption reservoir to ensure water renewal.• Pressure sustaining: protecting the supply network against an excessive

pressure drop during the reservoir filling phase.• Pressure relief: protecting the supply network against overpressure.

7. Hydro-Savy flow limiting float valve Series K3 80Functions:• Closes completely at a constant, adjustable top level.• Opens at a constant lower level after consumption of an adjustable

water depth.• Limits the supply flow to the reservoir to an adjustable value.• Manually controlled opening and closure as an option.Sample applications:• Controlling supply to a low-consumption reservoir to ensure water renewal.• Controlling the flow delivered to the reservoir in the event of dual supply,

water supply contracts, etc.

Hydro-Savy Pressure Sustaining/Relief Float XGS

Hydro-Savy Flow Limiting Float XG

Hydro-Filter XG

Series K3 35

Series K3 70

Series K3 80

XG MODEL

RECOMMENDED

XGS MODEL

RECOMMENDED

XGS MODEL

RECOMMENDED


The Hydrobloc systemPumping station control

The Hydrobloc system applications for pumping station control can be split into two categories: - Valves mounted parallel to the discharge pipe. - Valves mounted inline on the discharge pipe.Our Customer Technical Support department (CTS BAYARD) can help you define your operating scenario and specify the valves required.These valves protect the pumping station, but not the network.

1. Hydro air entry and exhaust pressure relief valveFunctions:• Exhausts air at high flow on pump start-up.• Gradually closes as water arrives.• Exhausts overpressure to the atmosphere.• Solenoid-operated opening prior to pump start-up and shut-down available

as an option.Parallel applications only:• Protecting against unintended shut-downs and automatic restarting

of a pumping station.• Installation on the discharge column of a submersible pump.

2. Hydro surge anticipating valve - Series K1 40Functions:• Discharges overpressures resulting from sudden pump shut-down when

pressure returns to its original setpoint.• Gradually closes as water arrives.• Exhausts overpressure to the atmosphere.Parallel application only:• Protecting against unintended shut-downs of a pumping station.

3. Hydro relay pump valve - Series K4 50Functions:• Starts and stops pumps with valve closed.• Solenoid-controlled adjustable speed opening and closure.• Closes on reverse flow (non-return).• Most common options: - Sustaining upstream pressure. - Stabilising downstream pressure. - Controlled filling of the network. - Mechanical check valve.Sample inline application:• Protecting and ensuring optimum output of relay pumps and the network

being supplied.

4. Hydro differential control valve for booster pump - Series K4 55Functions:• Controls the pressure difference between suction and delivery sides of

a booster pump.• Most common options: - Solenoid-operated opening and closing. - Stabilising downstream pressure.Sample inline application:• Keeping the booster pump’s duty point at maximum output within its

operating range regardless of suction pressure.

Hydro Air entry and exhaust pressure relief XGA

Hydro Surge anticipating XG

Hydro relay pump XG

Hydro Differential for booster pump XG

Series K1 40

Series K4 50

Series K4 55XG MODEL

RECOMMENDED

XG MODEL

RECOMMENDED

XG MODEL

RECOMMENDED


The Hydrobloc systemPumping station control (continued)

The Hydrobloc systemElectric control

5. Hydro non-return valve with slow openingFunctions:• Slow opening at controlled and adjustable speed.• Hydraulic closing on reverse flow.Sample inline applications:• Protecting and ensuring optimum output of exhaust pumps and the

network being supplied.• Most common options: - Sustaining upstream pressure. - Stabilising downstream pressure. - Controlled filling of the network. - Combined with a wellhead air entry/exhaust and pressure relief valve

for submersible pumps.

1. Hydrelec Valve - Series K4 20Functions:• Step-by-step valve opening and closing controlled by two solenoids.• Choice of position when de-energised: closed, open or blocked.Sample applications:• Starting up and shutting down pumping stations.• Altering flow and/or pressure conditions in a network.• When fitted with a SCADA position transmitter, remote operation

via low-voltage current.• Most common options: - SCADA position transmitter. - Downstream pressure protection. - Reservoir filling protection. - Flow limiting. - 12 V solenoid valves.

2. Simplified On/Off Hydrelec valve Series K4 30Functions:• Solenoid-controlled opening and closing.• Choice of position when de-energised: closed or open.Sample applications:• Pump start-up with valve closed.• Electric sensor-controlled opening or closing.• Opening or closing when de-energised for shutoff use.• Most common options: - Limit switches. - 12 V solenoid valves.

Hydro Non-return slow opening

Hydrelec XG

Hydrelec simplified XG

Series K4 20

Series K4 30

XG MODEL

RECOMMENDED

XG MODEL

RECOMMENDED

XG MODEL

OR XGS MODEL


The Hydrobloc system - Network control

Hydro Two-stage hydraulic

Hydrostab 100% hydraulic pressure modulation downstream valve

Hydraulic assistance1. Hydraulic two-stage pressure control valve - Series K1 55Functions:• Ensuring two downstream pressure levels linked to a flow condition.Sample applications:• Adapting the pressure in a network to meet flow demand, according to a

selection of pre-defined downstream pressures set on the hydraulic pilots.• Most common options: - Fire protection during low-pressure periods. - Three pressure ranges.

2. Hydrostab 100% hydraulic pressure modulation downstream valve - Series K1 60

Functions:• The pressure necessary is adjusted automatically as a function of flow

demand. - The thresholds of the two pressure extremes are modified by changing

the setting of the two pilots. - The maximum pressure modulation range is 4 bar, allowing for fitting

on all existing installations. - Can be adjusted on site. - Fully stand-alone unit with no additional equipment or power required. - Offers immediate savings.Sample application:• Modulating and adapting the pressure in a network to meet flow demand,

according to the variation in downstream pressure to the setting thresholds.

The Hydrobloc system benefits from Bayard’s 130 years of experience in drinking water networks. This expertise means that we can offer reliable, easy to install solutions to improve pressure management in distribution networks, thus saving resources. • “Smart” Hydrobloc valves for: - Optimising the right pressure in the networks in accordance with requirements. - Reducing operating costs. - Pumping energy savings during low pressure periods. - Limiting the risk of burst pipes by reducing network pressure when demand decreases. - Limiting losses due to leaks. - Maintaining flexibility to meet any demand, particularly when supplying fire flow. - Increasing networks service life by reducing the loads placed on them.

• Our pressure management equipment operates: 1 - By hydraulic assistance. 2 - By mechanical assistance. 3 - By electronic assistance.

Series K1 55

Series K1 60


The Hydrobloc system - Network control

Mechanical assistance3. ACD040 anti-cavitation kit (see options on main valve)Function:• ACD040 kit required if operating conditions generate cavitation.Sample applications:• Controlling a network with particularly severe operating conditions.• Supplying a reservoir located near residences (reduced noise annoyance).

Electronic assistance4. Two-stage pressure control valveFunction:• Ensures two different downstream pressure levels according to

programmable time slots.Sample applications:• Modulating and adapting the pressure in a network to meet flow demand,

according to a selection of pre-defined time slots stored in a stand-alone controller.

• Most common options: - IP68 rating. - Fire protection during low-pressure periods. - Three pressure ranges. - Programming via radio module (for submersible or inaccessible valve

chambers).

5. Hydro-electric valve controlled by I-PilotFunction:• Application of the K4 40 SCADA valve with transmission of electric pulses

controlled by a programmable controller to the solenoids. The control obtained is very accurate and matches the demand.

Sample applications:• Modulating and adapting the pressure in a network to meet flow demand,

according to a selection of pre-defined time slots stored in a stand-alone controller.

• Most frequently requested options: - IP68 rating. - Fire protection during low-pressure periods. - Downstream pressure protection.

6. Motorised pressure control valveFunction:• Accurately adjusts the pressure in a network to variations in consumption

by motorised pilot.Sample applications:• Modulating and adapting the pressure in a network to meet flow demand,

according to information from a central SCADA unit.• Most common options: - IP68 rating.

7. Programmable network drain valve, series H5 10Function:• Causes programmable, controllable draining of a network, without

external energy.Sample applications:• Ensuring water renewal in a little-used network.• Most common option: - IP68 rating.

Programming terminal

Downstreampressure

Time

Downstreampressure

Time

LOWflow

HIGH flow

Downstreampressure

Time

Downstreampressure

Time

LOWflow

HIGH flow

Downstreampressure

Time

Downstreampressure

Time

LOWflow

HIGH flow


The Hydrobloc systemMain valve options

Stainless steel body:Entirely made from 316 L stainless steel, particularly suitable for contact with salt water.

Assisted opening kit, KV023:System for pulling the mobile unit upwards, to facilitate main valve opening without pressure.Applications: - Very low working pressure. - Minimum head loss available

at full flow.

Automatic air vent kit, KV007:Small air valve mounted above the position indicator automatically vents any air that accumulates in the valve during operation and ensures optimum valve operation.

Mechanical switches, KV012: - DN 50 to 300 XG. - DN 350 to 400 XGS.

Magnetic limit switches, KV008: - 6 - 240 V, AC/DC

Analogue opening switches, KE015:With magnetic switches and a valve position sensor to display main valve opening percentage, 0 - 1,000 Ω (4/20 mA through a converter).SCADA position transmitter, KV013:Control device with 4-20 mA position indicator and 6-240 V AC/DC limit switches

Other options:

- Vertical or horizontal installation up to DN 250 XGS, KV006

- Valve without position indicator - Mechanical stroke limiter - Built-in mechanical check valve - Reinforced coating for cast iron components, KV016 - Ozone protection - Reinforced stainless steel mobile unit, KV003 - Stainless steel seat on DN > 400 XG and 600 XGS

Anti-scaling stem, KV004The upper and lower guide portions are Teflon coated. Scale is deposited but does not build up, as the guides self-clean through the movement of the mobile unit during operation.



The Hydrobloc systemMain valve options (continued)

Pressure gauge:0 to 6 bar. 0 to 16 bar. 0 to 25 bar. 0 to 40 bar. M G 1/4 threadAccuracy class 1.6304 stainless steel construction with brass base.

Twin filtration, KH002: - Facilitates filter

maintenance without interrupting service. Recommended on raw water networks.

- Automatic filtration; please consult us.

Operating speed control, KH019: - Stainless steel seat and bronze body for corrosion protection - Main valve opening speed controller. - Main valve closing speed controller. - Main valve closing and opening speed controller.

Pilot motor:24 V 50 Hz, with 4-20 mA positioner, can be fitted to all pressure, flow and level control pilots; please consult us.

Manual control:Enables use of the valve as a hydraulically-controlled shutoff valve, which can be beneficial on large DNs.

Programmable timer control:Selects or cancels a function in accordance with timer programming.

Return or non-return function circuit:Lets the valve open or close when direction of flow reverses.

Solenoid control:• 12 V, 24 V, or 240 V• Selects or cancels a

function in accordance with timer programming.

Hydraulic function bypass:Selects or cancels a function when a pressure or flow setpoint is reached.

316L stainless steel pilot:High corrosion protection, particularly suitable for contact with salt water.

Slotted cylinder anti-cavitation kit:The new Bayard ACD 040 (Anti-Cavitation Device 0 to 40 bar) is a significant innovation in cavitation control.

Applications:

• Significant pressure reduction. (e.g.: booster pump bypass).• Noise reduction. (e.g.: relief valve).• Reservoir filling.• In general, all applications in which valves are subject to extreme pressure differences

or downstream pressure conditions that promote cavitation.

For more information, see page 31.

Additional pilot circuit products

01

02


PATENTED


The Hydrobloc system - Selection criteria

• Each network is unique. If a control valve is to be fully satisfactory and have the longest service life possible, a number of criteria must be established:

- The main function. - The network’s service life scenario, which will determine the operation

of the valve. - The ancillary function(s). - The additional options. - The model and DN. - The network operating conditions (flow, pressure, etc.). - The options specific to the operating conditions. - The type of installation.• Our documentation covers the most common pressure and level

management scenarios, with one or two functions.• For more complex flow, pumping station and network functions or valves,

we recommend that you contact the Customer Technical Support department (CTS BAYARD).

1. The operating scenario• This involves defining: - The operation of the valve in accordance with changes in the hydraulic

characteristics of the supply (upstream network). - The operation of the device in accordance with downstream network

requirements and upstream network resources.

2. The main function• The main function is imposed by the operating scenario: - To control upstream or downstream pressure, see page 16 - To control flow, see page 17 - To control a level, see page 18 - To control a pumping station, see page 20 - To control a network, see page 22

3. The ancillary function(s), see page 22• Safety functions• Control functions: - Flow limiting - Function selection or cancellation

4. The additional options• On the main valve, see page 24• On the pilot circuit, see page 25

Edition 02/2014


1. Choosing the DN; verifying operation:• The diameter of a valve must match the installation’s operating conditions. To specify a valve, the

most important information required is: - The minimum flow Q1, or the flow at off-peak times. - The maximum flow Q2, or the flow at peak times. - The maximum exceptional flow Q3, i.e. for fire protection, seasonal variations. - The minimum head loss available in the valve at each of these flow.

There are two possible scenarios: - Scenario 1, the head loss Δp available is less than 1 bar. - Scenario 2, the head loss Δp available is greater than 1 bar.

• This vital information can be used in several ways to specify a model and a DN: - By consulting your Customer Technical Support representative. - By entering your data into the Hydrosize sizing software package. - By looking at the table on page 28 for the flow ranges for each model by DN according to the

Δp available. - By using the Bayard slide rule or the operating diagrams (page 29), as these are based on the

flow velocities in the inlet area of the valve.

2. Choosing the model and DN using the Hydrosize software package:

The Hydrobloc system - Hydrosize softwareSizing and choosing the model

Multiple applications: - Hydrobloc control valves. - Monostab stabilisers. - Djet pressure relief water hammer valve. - Vannair air entry and exhaust. Additional calculations: - Linear head loss. - Local head loss. - Orifice plate sizing. - Unit converter. - Calculation of the flow of a Hydrobloc.

• The choice of main valve model depends on the function required.

• The software helps you select products to optimise equipment service life. • Data saved in PDF format.


The Hydrobloc systemEstablishing a project - Operating ranges

• In Example 1, the Δp available are high and all of the flow defined are in Scenario 2.

- 1. Plot the 3 horizontal lines corresponding to the 3 flow Q1, Q2 and Q3.

- 2. The 3 flow are in Scenario 2, i.e. in the grey and red zones. - 3. The ideal valve is indicated by the first column in which the 3 horizontal

lines are in the red and grey zones: DN 80 XGS in this example. - 4. Check the valve operating conditions in the cavitation diagram for the XGS

model below. - 5. The three values are in zone A, the normal operation zone.

• In Example 2, the flow are identical, but the Δp available are high in Q1 and Q2 (Scenario 2) and low in Q3 (Scenario 1).

- Plot the 3 horizontal lines corresponding to the 3 flow Q1, Q2 and Q3. - As Scenario 1 and Scenario 2 are envisaged, Scenario 1 (grey and blue

zones) must be used by default. - The ideal valve is the first column in which the 3 horizontal lines are in the

grey and blue zones: DN 100 XG in this example. - Check the valve operating conditions in the cavitation diagram for the XG

model below. - The three values are in zone A, the normal operation zone.

Cavitation diagrams

• Zone A: Non-cavitation conditions. • Zone B: Severe operation zone. Use a KV003 reinforced mobile unit.• Zone C: Cavitation zone. Use an ACD040 anti-cavitation kit or equipment in series. If the outlet pressure is less than 1 bar, an air entry device can be considered (please consult us).• Zone D: Impossible zone; upstream pressure is lower than downstream pressure.

XG Model

BC

D

A

Ups

trea

m p

ress

ure

0 5 10 15 20

25

22.5

20

17.5

15

12.5

10

7.5

5

2.5

0

Downstream pressure (bar)Downstream pressure (bar)

BC

D

A

Ups

trea

m p

ress

ure

0 5 10 15 20

25

22.5

20

17.5

15

12.5

10

7.5

5

2.5

0

XGS Model

This diagram can be used to check the valve operating conditions.

Example 1 Q1 Q2 Q3

Q values in l/s 2 l/s 7 l/s 14 l/s

Upstream pressure 14 bar 12 bar 8 bar

- Downstream pressure 3 bar 3 bar 3 bar

= Δp available 11 bar 9 bar 5 bar

Example 2 Q1 Q2 Q3

Q values in l/s 2 l/s 7 l/s 14 l/s

Upstream pressure 10 bar 8 bar 3.5 bar

- Downstream pressure 3 bar 3 bar 3 bar

= Δp available 7 bar 5 bar 0.5 bar

3. Choosing the model and DN by operating range, page 29:Reminder• The diameter of a valve must match the installation’s operating conditions.To specify a valve, the most important information required is: - The minimum flow Q1, or the flow at off-peak times. - The maximum flow Q2, or the flow at peak times. - The maximum exceptional flow Q3, i.e. for fire protection, seasonal variations. - The minimum head loss available in the valve at each of these flow.

There are two possible scenarios:• Scenario 1: the head loss available is less than 1 bar (usable zones: grey and blue zones in the diagram on page 29).

The head loss in the valve must be as low as possible as the head loss available in the network, or the static pressure, is less than 1 bar.

• Scenario 2: the head loss available is greater than 1 bar (usable zones: grey and red zones in the diagram on page 29). As the head loss available in the network is greater, higher velocities are permissible.

All Δp > 1 bar = Scenario 2

At least one Δp < 1 bar = Scenario 1


0.1

1

10

100

1000

10000

32 X

G50

XG

S50

XG

65 X

GS

65 X

G80

XG

S80

XG

100

XGS

100

XG12

5 XG

S12

5 XG

150

XGS

150

XG20

0 XG

S20

0 XG

250

XGS

250

XG30

0 XG

S30

0 XG

350

XGS

400

XGS

400

XG50

0 XG

S

600

XGS

600

XG70

0 XG

S

800

XG90

0 XG

S

1000

XG

S


- The Δp available in the valve must be between the Δp necessary for the valve to operate and the maximum permissible Δp (see cavitation diagrams).

- The Δp available in the control valve must be less than 1 bar (10 mWC).

- The Δp available in the control valve must be greater than 1 bar (10 mWC).- The Δp available in the valve must be between the Δp necessary for the valve to operate and the

maximum permissible Δp (see cavitation diagrams).

• Scenario 2:

• Scenario 1:

l/s

60 m3/h

40 m3/h

20 m3/h

15 m3/h

120 m3/h

10 m3/h

5 m3/h

1 m3/h

2 m3/h

3 m3/h

Q1

Q2

Q3



4. Choosing the model and DN with the Bayard slide rule:• The instructions enclosed with the Bayard slide rule can be used to identify

the right control valve for the installation and operating conditions.• The diagrams below can be used to check whether the valve will operate in

an optimum operating zone, using the Δp available and the velocity in the inlet area.

5. The operating conditions• Valves are sized depending on the valve area at the valve disc (smaller on

XGS models, approximately the same as the inlet area on XG models), and the water flow velocity or flow (Q = V x S).

• The Hydrobloc valve is a pressure retaining valve; its valve area is equal to the circumference of the seat multiplied by the valve disc lift.

• At between 15 and 75% open, valve operation is optimum in normal operating conditions.

• Below 15%, the control quality remains excellent, due in particular to the LFS device, but the valve is subjected to severe operating conditions that may lead to vibration and noise. The valve is probably oversized.

• Above 75% open, control is less effective as the pressure differential becomes very low. The valve is slow to react; it is probably undersized. However, this range can be used in “on/off” mode, as in reservoir filling applications for example.

Operating diagrams

• Zone 1 = normal operating conditions.• Zone 2 = the Δp available is too low; please consult us.• Zone 3 = operation is possible, but not recommended for permanent operation; please consult us.

Hea

d lo

ss (m

WC

)

250

100

10

4

0.2 0.5

2

31

160

1 2 3 4 5 6

Velocity (m/s)

XGS Model

DN XGS/LG Models XG Model

K Kv K Kv32 2.9 24.0 40 5.9 26.0 50 12.7 27.8 4.3 48.0 65 11.2 50.0 5.4 73.0 80 12.4 72.0 5.2 111.0

100 13.0 110.0 5.0 177.0 125 10.8 188.0 5.7 259.0 150 20.8 195.0 5.3 388.0 200 14.0 424.0 5.5 673.0 250 16.6 608.0 6.4 978.0 300 12.4 1,012.0 6.1 1,443.0 350 12.2 1,389.0 400 20.1 1,413.0 4.0 3,168.0 500 9.9 3,147.0 600 20.2 3,172.0 6.0 5,821.0 700 11.9 5,626.0 800 7.7 9,134.0 900 11.5 9,454.0

1,000 16.7 9,676.0

1 2 3 4 5 6 7

2

31

160

Velocity (m/s)

Hea

d lo

ss (m

WC

)

250

100

10

2.5

0.2 0.5

XG Model

100

90

80

70

60

50

40

30

20

10

0

0 10 20 30 40 50 60 70 80 90 100

Ope

ning

%

% Kv

XGS Model

XG Model

Reminder: - The head loss in the Hydrobloc valve is its

motive force.

- The XGS model has a smaller valve area than the inlet area.

Bayard slide rule


The Hydrobloc system - Establishing a project - Options specific to the operating conditions

TYPE/DN XGS Model XG Model

50 X* 465 4 480 4 4

100 4 4125 4 4150 4 4200 X 4

• These are essentially options on the main valve: - Anti-scaling stem for contact with water containing encrusting limescale. - Assisted opening. - Automatic air valve for venting air from the chamber on valves located at

the top of reservoirs. - Reinforced stainless steel mobile unit to withstand cavitation on models

incompatible with the ACD 040 device. - Mechanical or magnetic switches to indicate open/closed positions to a

control module. - Analogue opening indicator to indicate valve disc opening percentage to a

flow calculation programme. - SCADA position transmitter to send the network monitoring system

information about valve movements. - Stainless steel seat on DN higher than 400 XG and 600 XGS if the valve

works for long periods with an opening percentage of less than 15%. - Vertical or horizontal installation. - Reinforced coating for cast iron components. - Stainless steel body for contact with salt water. - Built-in mechanical check valve. - Ozone protection, etc.

Anti-cavitation deviceThe new ACD 040 (Anti-Cavitation Device 0 to 40 bar), BAYARD patent pending, represents an advance in the control of cavitation and high velocities.

Based on the principle of a double slotted cylinder, tried and tested in our needle valves for a long time, the design has been optimised to accommodate high pressure differences at small openings while retaining high flow capacity when fully open (to guarantee fire flow, for example; the DN100 version has a Kv of 103 m3/hr).

The principle of this device is the dissipation of energy in 2 successive, balanced phases, phases 1 and 2. Approximately 2/3 of the pressure reduction is achieved by moving from zone 1 to zone 2. Any cavitation will be contained in zone 2. Flow from zone 2 to zone 3 completes the pressure and high speed reduction, whatever the opening percentage (patent pending).

Using these 2 principles, cascade dissipation and linearity on the opening range, the ACD 040 device offers remarkable performance.

Hydrostab pressure reducing valve

fitted with the ACD 040 system

Zone operating principle

1 2 3

Curve showing the % pressure dissipation in zone 1.

Phase 1: zone 1 to zone 2Phase 2: zone 2 to zone 3

Phase 2

Phase 1

100

100

75

75

50

50

25

25

0

1

%

zon

e 1

pres

sure

Opening %

ACD 040

The range

Not compatible with the XGA design* Please ask.

PATENTED


The Hydrobloc system - Establishing a project

The installation• The recommended equipment is vital for safety during filling and maintenance, as well as for the satisfactory operation

of the valve.• For the purposes of illustration, we will look at the case of a Hydrostab pressure reducing valve. In this case,

the air valve is fitted downstream if the pipe runs downwards to the stabiliser or upstream if the pipe runs upwards to the stabiliser.

Consult your Bayard representative

01 01

05 07

PN 16 bar

B1 92B1 20 or 25

F1 20 C4 20

B5 30

PN 25 bar

04 04C1 55 C4 30

02 03

06 06

F3 10

C1 30 - C1 35 C1 45

C4 60 K5 20 F1 30

Safety and environment:

• Installation, maintenance and repair operations

must be conducted by qualified and approved

personnel. Such operations shall comply with

current local regulations relating to occupational

safety and the environment. Appropriate personal

protective equipment shall be worn. Lifting

accessories and tools used shall comply with

current legislation and the relevant operating

conditions shall be respected.

• With regard to the environment, the valve

is recyclable. Dispose of the cardboard box

and/or wooden crate in a recycling container. The

packing foam is a neutral waste and can be taken

to a waste treatment centre or incinerated without

the release of toxins. Plastic items (bags, blocks

or end closures) shall be processed as household

waste.

Storage, handling:

• The valve can be stored for a maximum of one

year at temperatures not exceeding 65 °C, and

protected from humidity and impacts.

• Handle carefully, using suitable lifting accessories

attached to the lifting eyes or flanges. Do not

under any circumstances lift the valve using the

pilot circuit tubes.

Package contents:

• A Hydrobloc control valve with its specific pilot

circuit.

• The installation and maintenance manuals.

• The pressure gauges, if they were ordered in

addition to the valve.


The Hydrobloc system - Establishing a project

01

0602

03

04

01

05

06

07

A safety relief valve; this will protect the downstream network should the stabiliser fail due to a lack of inspection or minimum maintenance. Its gradual leakage will alert the network supervisor of a fault before any possible financial consequences occur as a result of burst pipes due to overpressure.

03 : the valve shown is a Hydrostab pressure reducing valve. In some cases, an orifice plate flange is added upstream of the valve, max. length = 50 mm (flow limiting, pressure modulation).

Depending on the DN, the overall dimensions of the pilot circuit may be larger than those of the valve.

Accessories are BAYARD PN 25 products. Please check dimensions if other products are used.• The lengths “L” correspond to PN 25 equipment. They may vary depending on the PN and flange drilling. The upstream

and downstream “connecting flange clearance 06 ” will absorb this variation.PN 40 bar, consult your Bayard representative.

• The manhole must allow for a height of 1.50 m above the piping and 0.30 m below. If these dimensions cannot be respected for technical reasons, ensure 1.00 m above and at least 0.80 m below for the safety of personnel during inspection and maintenance operations.

• The manhole must include a suitable drainage system. In order for the air valve to operate correctly the location must not be hermetically sealed.

* Average length** Relative to the wall

DN Upstream valve

Strainer box

Hydrobloc control valve

Dismantling joint*

Downstream valve

Tee for air valve

Length L Connecting flange clearance**

Minimum manhole

length

Additional lengths,

as required

Minimum maintenance

width

01 02 03 04 01 07 06

40 240 230 230 200 240 280 1,420 2 x 250 1,920

- Bulk meter or Converging tubes

- Orifice plate flange

- Tee for Djet pressure relief valve

- Tees for bypass

1,300

50 250 230 230 200 250 320 1,480 2 x 250 1,980 1,300

60/65 270 230 290 200 270 320 1,580 2 x 250 2,080 1,300

80 280 300 310 210 280 330 1,710 2 x 300 2,310 1,300

100 300 300 350 220 300 360 1,830 2 x 300 2,430 1,500

125 325 400 400 220 325 400 2,070 2 x 350 2,770 1,500

150 350 400 480 230 350 440 2,250 2 x 350 2,950 1,500

200 400 500 600 230 400 520 2,650 2 x 400 3,450 1,800

250 250 600 730 250 250 380 2,460 2 x 400 3,260 1,800

300 270 850 850 250 270 450 2,940 2 x 250 3,840 1,800

350 290 980 980 270 290 470 3,280 2 x 450 4,180 2,000

400 310 750 1,100 280 310 490 3,240 2 x 500 4,240 2,000

500 350 870 1,250 300 350 650 3,770 2 x 600 4,970 2,000

600 390 1,000 1,450 320 390 700 4,250 2 x 750 5,750 2,500

700 430 1,650 1,650 325 430 650 5,135 2 x 750 6,635 2,500

800 470 1,850 1,850 325 470 690 5,655 2 x 850 7,355 3,000

900 510 2,050 2,050 325 510 730 6,175 2 x 1,000 8,175 3,000

1,000 550 2,250 2,250 325 550 770 6,695 2 x 1000 8,695 3,000

Indicative dimensions of manholes in mm

L


The Hydrobloc system - Sample installations

Bypass installation

Hydro upstream pressure sustaining valve installed in-line and Hydro pressure relief valve installed in parallel

Hydro-Savy float valve on reservoir

Hydro Altitude on water towerHydro pressure sustaining valve on pump

outlets and Hydro surge anticipating valve installed in parallel


BAYARD, a TALIS Group companyLeading the way in flow control

Small diameter downstream stabiliser Series F2 21

Control valve Needle valve

Spring-loaded stabiliserSeries F2 10 and F2 30

Single-diaphragm valve Large diameter overspeed

Your Choice in Waterflow Control

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BAYARD

ZI - 4 avenue Lionel Terray

CS 70047

69881 Meyzieu cedex France

TÉL. + 33 (0)4 37 44 24 24

FAX + 33 (0)4 37 44 24 25

SITE : www.bayard.fr

Specifications and performance may be changed without notice as a result of technical developments. Images and photos given for illustration purposes only.

Hydrobloc system - Series K Hydraulic control valves - General · The Hydrobloc valve opens. • If...

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