Volume Control Dampers

VOLUME CONTROL DAMPERS

WE SHAPE

AIR

PRODUCTS CATALOGUE

PRODUCT BULLETIN

Dubai Head Office:

Tel: +971 4 706 97777Fax: +971 4 706 9787

Abu Dhabi Branch:

Tel: +971 2 645 0107Fax: +971 2 645 0167

Email: [email protected]

P.O. Box 50708, DubaiUnited Arab Emirates

w w w . b e t a g . c o m

index

RECTANGULAR VOLUME CONTROL DAMPERS

STAINLESS STEEL VCD & VDR

VCD MULTI SECTION ASSEMBLY

MOTORIZED VOLUME CONTROL DAMPER

MECHANICAL FLOW RATE CONTROLLER MRP - 1

MECHANICAL FLOW RATE CONTROLLER MRP - 2

1

2

3

4-6

7-8

9-10


Frame

Blades

: 1..2 mm thick Galvanized steel with

: welding / clinching corners

: 0.9 mm (optional)

: Extuded Aluminium profile aero foil blades, 1mm thick

: 75, 100 & 150 mm blade width to suit different sizes

Bushings

Control shaft

Quadrant

: Plastic self oiling type

: 6” long plated steel , 1/2” square bar

: From stamped G1

133210

192.410

10 10

180133

25

H x

W

H x

W

H x

W

H x

WGE

AR

SIZ

E

VCD-Flange type VCD-Slip & Clip type VCD-Box type VCD withgear mechanism

PATTERN OPTIONS SIZE W x H: WIDTH x HEIGHTMIN SIZE : 100 x 100 MM

MAX SIZE : 1000 x 1000 MM

SIZES ABOVE THIS SIZE WILL BE MADE IN MULTIPLE SECTION AS PER SKETCH PAGE NO.3

FIXINGF=FLANGEDSC=SLP & CLIPB=BOX

BLADE MOVEMENT O=OPPOSED (STD)A=PARALLEL

MECHANISML=LINK (STD)G=GEAR

VCD: VOLUME CONTROLDAMPERO

rder

ing

Sy

stem

INTRODUCTION

RECTANGULAR VOLUME CONTROL DAMPERS


ALL DETAILS SUBJECT TO CHANGE WITHOUT PRIOR NOTICE


STAINLESS STEEL VCD

STAINLESS STEEL VCD

Frame

Blade

Bearing Shaft Handle

: S. Steel sheet 1.2mm thickness

: S. Steel sheet 0.9mm thickness

: Round Brass/S. Steel : S. Steel Round section : S.Steel

Stainless SteelBrass Bush

Handle SS plate

Ord

erin

g S

yste

m PATTERN OPTIONS SIZE W x H: WIDTH x HEIGHTMIN SIZE : 100 x 100 MM

MAX SIZE : 1000 x 1000 MM

SIZES ABOVE THIS SIZE WILL BE MADE IN MULTIPLE SECTION AS PER SKETCH PAGE NO.3

FIXINGF=FLANGEDSC=SLP & CLIPB=BOX

BLADE MOVEMENT O=OPPOSED (STD)A=PARALLEL

MECHANISML=LINK (STD)G=GEAR

SSVCD: STAINLESS STEELVOLUME CONTROL DAMPER

ROUND VOLUME CONTROL DAMPER - VDR

The frame and blade in Round Volume Control Damper are made of 0.9 mm galvanized

steel and unit is fixed with hand quadrant for manual operation.

The finishing is mill galvanized.

Axle: 1/2” square aluminium hollow tube riveted to blade

L= DIA + 60 mm

TYPE SIZE

: DIAMETER

VDR: ROUND VOLUME CONTROL

DAMPER

Diameter

30 m

m30 m

m


Blade 0.9m thick SS sheet

Shaft SS Round section

Frame 1.2mm thick SS sheet


Frame : G1 1.2 mm with welded corner

Blades: Aluminium aerofoil type - 1mm thick

Mechanism of movement: plastic gear of 100mm Dia.

The control shaft: 10” long plated steel 1/2 inch square bar.

Motorized VCD can be supplied without motor with provision to fix motor.

MOTORS: As a standard: Belimo models used with our product.

Other models can be used on request.

TYPE OF MOTORS: 1) Open / Close type without spring return function.

2) Open / Close type with spring return funcion.

Motor Model according to damper size as per following pages.

ORDERING SYSTEM: MVCD - Motorized Volume Control Damper+Motor details as applicable.

SQUARE SHAFT

MOTOR

GEAR MECHANISM




Non spring-return actuators

TMC..A LMC..A LM..A NM..A SM..A GM..A

2 Nm 5 Nm 5 Nm 10 Nm 20 Nm 40 Nm

20.4 m 21 m 21 m 22 m 24 m 28 m

TMC24A

TMC24A-S

TMC230A

TMC230A-S

TMC24A-SR

LMC24A

LMC24A-S

LMC230A

LMC230A-S

LMC24A-SR

LM24A

LM24A-S

LM230A

LM230A-S

LM24A-SR

LM230ASR

NM24A

NM24A-S

NM230A

NM230A-S

NM24A-SR

NM230ASR

SM24A

SM24A-S

SM230A

SM230A-S

SM24A-SR

SM230ASR

GM24A

GM230A

GM24A-SR

LM24A-MF NM24A-MF SM24A-MF GM24A-MF

6 ... 20 mm 6 ... 20 mm 6 ... 20 mm 8 ... 20 mm 10 ... 20 mm 14 ... 26 mm

35 s 150 s

Disengaging the gearing latch by means of pushbutton, self-resetting

2Cable 1 m, 3 x 0,75 mm

Can be selected with switch

Omax. 95 , can be limited at both ends with mechanical adjustable end stops

IP 54 in all mounting positions

Mechanical, plug-on

max. 35 dB(A) max. 45 dB(A) max. 35 dB(A) max. 45 dB(A)

CE according to 89/336/EEC

O-30 ... +50 C

O-40 ... +80 C

95% r.H., non-condensating (to EN 60730-1)

1) Control, operating range, running time and further functions are parameterisable with PC-Tool or with the parameterising device MFT-H

Further versions ex. fast running or form-fi t types on request.

Damper shaft

Running time

Manual override

Connection

Direction of rotation

Angle of rotation

Degree of protection

Position indication

Sound power level

EMC

Ambient temperature range

Non-operating temperature

Ambient humidity range

Air damper size up to approx.

Open/

Close

Modula-

ting

Multi-

func-

tional

AC / DC 24 V

Auxiliary switch add-on 1 x SPDT, 1 mA...3 (0.5) A

AC 230 V

Auxiliary switch add-on 1 x SPDT, 1 mA...3 (0.5) A

AC / DC 24 V

AC 230 V

Positioning signal Y: DC 2 ... 10 V, 100 kOhm

Position feedback: DC 2 .. 10 V, max. 1 mA

Parameterisable 1)

Electrical installation ..M24A(-S) ..M230(-S) ..M24A-SR ..M24A-MF


Open/Close 3-point modulating multifunctional

Y = DC 0...10 VU = DC 2...10 V

Y = Control signalU = Measuring voltage

N L1

1 2 3 S1 S2 S3 1 2 3 S1 S2 S3

N L1

0...100% 0...100%

MOTORIZED VOLUME CONTROL DAMPERS


Y U


Spring-return actuators

Air damper size up to approx.

Open/

Close

Modula-

ting

Multi-

func-

tional

AC / DC 24 V

Auxiliary switch add-on 1 x SPDT, (AF24-S : 2 x SPDT)

AC 230 V

Auxiliary switch add-on 1 x SPDT, (AF230-S : 2 x SPDT)

AC / DC 24 V

Positioning signal Y: DC 2 ... 10 V, 100 kOhmPosition feedback: DC 2 .. 10 V, max. 1 mA

Parameterisable 1)

Damper shaft

Running time

Manual override

Connection


Angle of rotation

Angle of rotation limiting

Position indication

Degree of protection

Sound power level

EMC

Ambient temperature range

Non-operating temperature

Ambient humidity range

- Motor

- Spring return

- Motor

- Spring return

Control, operating range, running time and further functions are parameterisable with PC-Tool or with the parameterising device MFT-H

Further versions ex. fast running or form-fi t types on request.

Electrical installation ..F24 ..F24-SR ..F230 ..F24-SR ..F24-MFT

Open/Close modulating multifunctional Mounting direction

Y = Control signalU = Measuring voltage

Y = DC 0...10 VU = DC 2...10 V

Y U

L1N

21

M

1 2 3 5R L R L

RL

Y = 0 Y = 0 Y = 0 Y = 0

TF24

TF24-S

TF230

TF230-S

TF24-SR

2 Nm 4 Nm 15 Nm

TF LF AF

20.4 m 20.8 m 23 m

LF24

LF24-S

LF230

LF230-S

LF24-SR

AF24

AF24-S

AF230

AF230-S

AF24-SR

TF24-MFT LF24-MFT AF24-MFT

6 ... 12mm 8 ... 16mm 10 ... 20mm

2<75 s<25 s

240-75 s<20 s

~150 s~16s

Crank handle

Cable 1 m

selected by mounting L/R

O max. 95

yes yes yes

mechanical

IP 42 IP 54

max. 50 db(A)= 62 db(A)

max. 45 db(A)= 62 db(A)

CE according to 89/336/EEC

O -30 ... +50 C

O -40 ... +80 C

95% r.H., non-condensating (to EN 60730-1)

2) SR-typ 150s

MOTORIZED VOLUME CONTROL DAMPERS



Description :With the circular air flow controllers with automated action, the air flow rate is controlled via an asymmetrical control flap pivot-ing on a smoothly running bearing, so as to provide highly sensi-tive response and control even with low flow rates. Manual flowrate setting is also available, by adjusting the tension of the drawing spring according to a scale denoting the desired flowrate. In selecting the controller and sizing of the ducting, theminimum air flow velocity of 2.7 m/s should be ensured.

Application :These controllers are designed to control air flow rate in circularduct systems.

Material :Mechanical flow rate controllers MRP-1 are made of galvanisedsteel sheet. They are laser butt-welded to eliminate sharp seamsboth inside and outside.The joining ends are calibration pressed in conformance with DIN24147 to provide their extreme stability and accurate fitting.Cushioned control flap: a piston damper prevents vibrations andoscillations of the control flap. On order, mechanical air flow ratecontrollers are also available with 25 or 50 mm acoustic or thermal insulation.

Installation :The controller can be installed at any location of the ventilationsystem. Access to the ducting and the controller shall be providedin conformance with DIN 1946 T2, for the purposes of actuation and maintenance. A minimum 3xL length straight duct section shallbe provided on both sides of the controller, to ensure flow stabilisation and efficient controller operation. Inlet and outlet ducting sections should be of equal diameter. The indicated reference air flow velocity is approx. 4.5 m/s. Air flow velocity should be within the range of optimum flow rate. A circular rubber seal provides secure sealing. since the gap between the duct section and the joining end of the controller is thus equalised and kept constant by the weights of joining components.

Standard Designs :Constant flow air flow rate controller will tight insertion seating(joint dimension only):

1. Automatic control autonomous of external energy sources, withbasic factory settings or user selected settings of reference airflow rate;2. Optional post-installation setting, by means of the setting device;3. Maximum pressure drop across the controller 1000 Pa;4. Special controller variants available, without the setting device,for unobtrusive installation . suitable for installation in open ducting(this design, however, does not allow flow rate setting afterinstallationi);5. L 1 = length of the insertion section, total length = L 1 + 2 x L 2

Mechanical flow-rate controller MRP-1 (Circular)

1.5.5.04 MECHANICAL FLOW-RATE CONTROLLER

Examples of installation Recommended straight ducting sections L2

m =+ 7%2

m =+ 10%

0 D 0 D> >

3 D 2 D> >

0 D 0 D> >

70

80-2

50

L2 L2L1

110

L2 L2L1

315-

400

MEHANICAL FLOW-RATE CONTROLLER MRP-1



1.5.5.04 MECHANICAL FLOW-RATE CONTROLLER TECHNICAL SPECIFICATION

Nominal dimensionmm

Allowable air flow3range m /h;

Optimumair flow range Pa

Max. staticpressure drop

Pa

Recommendedduct air velocity

m/s

Dimension mm

Dimensions - air flow rate:

Diagram: static pressure drop resulting in the controller response:

300

250

200

150

100

50

0 2,0 3,0 4,0 5,0 6,0 7,0 8,0 9,0 10,C

p(P

a)

In sizing the air ducting, one shall observe theminimum pressure drop to result in the controllerresponse.

Air flow rate controller: type MRP-1Nominal length: ND 160Air flow velocity: 4.5 m/s

3Air flow rate: 325 m /hStatic prssure drop p in Pa, from thediagram 1:50 Pa

Calculation example:

Ordering Key:

MRP - 1 / Q / size 80, 100, 125, 140, 160, 200, 250, 315, 4003example: flow rate setting to 120 m /h

circular design1

80100125140160200250315400

4070

100140180250500600

1000

125200280400500900

150022003800

5075

120150200300480770

1240

108170265330430670

105019002850

100010001000100010001000100010001000

ca. 2,7 do 6,0ca. 2,7 do 6,0ca. 2,7 do 6,0ca. 2,7 do 6,0ca. 2,7 do 6,0ca. 2,7 do 6,0ca. 2,7 do 6,0ca. 2,7 do 6,0ca. 2,7 do 6,0

120170170170240240240220295

404040404040406060

min max min max L1 L2


MECHANICAL FLOW-RATE CONTROLLER MRP-1


Description :Rectangular or square air flow controller is an autonomouscontrol component that maintains, within a defined range, aspecified constant air flow rate. The air flow rate is controlledvia a control flap pivoting on bearings on both sides, a systemof levers and a setting spring. The flap geometry ensures promptrespnse even under low pressure drops across the controller.The appropriate selection of the spring and the lever geometrylead to a defined correlation between the pressure drop and the position of the flap, thus maintaining a constant air flow rate.

Mechanical flow-rate controller MRP-2 (Rectangular)

Application :These controllers are designed to control air flow rate in rectan-gular duct systems. Their application temperature range is -20

Oto +110 C.. The controller operation starts at the minimumresponse pressure drop, which is a function of the air flow rate(Diagram2), and operates up to the maximum pressure drop of1000 Pa, in a stable control range. Across this operation rate.,the air flow rate deviations are limited to +10%. The controllercross section dimensions (width and height) should be selectedequal to the ducting dimensions in order to avoid mechanicaldeficiencies excessive pressure drops and increased operationnoises, Each flow rate controller is factory set to the flow raterequested by the customer. Within a certain range, the flow ratesetting can be changed, by means of the setting device.

The flow rate controller frame is made of galvanised steel sheet.The control flap is sated in special bearings made of PTFE forresistance against wear. To compensate any air flow oscillations,the controller is fitted by a damper fixed to the control flap,serving to damp any frequencies arising during fast openingor closing of the control flap. In this way, resonance vibrationsare avoided. The controller frame and connection parts conformto the sealing requirements for the angular components andclass C components of the prEN 1751 standard.

The controller can be easily installed in the ventilation system bymeans of its flange section. An important requirement is stablefixing of the ducting system to prevent oscillations of theducting in the flexible part during fast opening or closing of thecontrol flap. According to the general rules for the ventilationsystems, DIN 1946 Part 2(VDI rules for ventilation), access shallbe provided to the system ducting, for the purposes of adjustingand maintenance.

Material :

Installation :

1.5.5.04 MECHANICAL FLOW-RATE CONTROLLER

MEHANICAL FLOW-RATE CONTROLLER MRP-2


A

B

H

30


-

7000

5000

3000

2000

1000

500

300

200

100

0,02 0,03 0,04 0,05 0,08 0,1 0,15 0,2

2A (m)

Existing system: air flow rate controllertype MRP-2Width: 400 mm, height: 200 mm

2(duct cross section: 0.08 m )Parameter to be determinded: air flow ratesetting range from diagram 1:

3V(3m/s)=865m /h

3V(10m/s)=2880m /h


Existing system: air flow rate controllertype MRP-2Width: 250 mm, height: 200 mm

3Air flow rate 810 m /h(at air flow velocity 4.5 m/s)Parameter to be determined: staticPressure drop p in PaFrom the selection diagram: p = 80 Pa


300

250

200

150

100

50

0

2 3 4 5 6 7 8 9 10 11

p (P

a)

Diagram 1: fast selection of air flow rate range according to the duct cross-section:

Diagram 2: Static prssure drop resulting in the controller response:

10 m/s3 m/s

Ordering Key:

MRP - 2 / Q / size B x H (example: 400 x 200)3

example: flow rate setting to 120 m /h

rectangular design2

150-330301-400200-350351-500250-400401-500501-600

150-200150-200201-250201-250251-300251-300251-300

385385420420460460460

3-103-103-103-103-103-103-10

1000100010001000100010001000

40404040404040

75957595959595

95959595959595

Width Bmm

Height Hmm

Length Lmm

Air flow velocity m/s Max. staticpressure drop Pa

Dimensions mm500 501-502 503-511

1.5.5.05 MECHANICAL FLOW-RATE CONTROLLER TECHNICAL SPECIFICATION


MECHANICAL FLOW-RATE CONTROLLER MRP-2

v (m/s)


3Q

(m/h

)

Volume Control Dampers

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