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www.glenfield.co.uk
SERIES 855 (1400)
IN-LINE FLOW THROTTLING VALVE
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S E RI E S
8 5 5 ( 1 4 0 0 ) I N-L I NE F L
OWT HROT T L I NGV AL V E
1
The control of flow within a pipeline can vary from moderately to extremely severe and involves difficulties thatare generally those of obtaining regulation over the major part of the stroke, vibration, cavitation, erosion andscouring. Few of the more common valve designs are capable of fully performing the function
The Series 855 In-Line Flow Throttling Valve consistsof a flanged ductile iron valve body and a verticalsliding cylindrical sleeve. All interior surfaces thatcome in contact with the fluid are fabricated fromstainless steel or bronze. All ductile iron is epoxycoated.
In action, flow takes place radially inwards throughports in an outer fixed cylindrical liner and thenthrough corresponding ports in a similar movableinner sleeve into the interior of the valve. The energyof the jets is dissipated as they impinge againstradially opposite jets. Thus vibration is not transmittedto the valve components.
Actuation of the valve via fine thread rising screw canbe manual, electric or hydraulic operators. Electricactuators can be supplied for local and remote
control, and to work in conjunction with flow meteringor telemetry equipment.
(In all installations where throttling occurs, dissolvedair may separate out of the water stream due to thereduction of pressure. It is therefore good practice toprovide a small orifice air relief valve a short distancedownstream of the regulating valve.)
The Series 855 (used to be known as series 1400)In-Line Flow Throttling Valve controls flow using theprinciple of throttling across multiple tapered portswhich are positioned around the valve liner. The portshape and arrangement can be designed specificallyfor each application to provide optimum valveperformance and flow control characteristics.
The valve is capable of operating for long periods atany degree of opening over the full length of itsstroke, the shape of the ports in the liner beingdesigned to give flow regulation over the full travel,
without risk of vibration and with complete safety.Droptight closure is not provided, this is effected bythe pipeline isolation valves.
INTRODUCTION
DESIGN
CONSTRUCTION
PERFORMANCE / ENERGY
DISSIPATION
PPLICATION : In Line Flow Throttling
STANDARD SPECIFICATION BODYThe valve body shall be flanged on both theupstream and downstream ends conforming toapplicable standards for bolting into the systemconduit. The body section and flanges shall beductile iron.
LINERThe fixed liner which contains the ports shall beconstructed using stainless steel. The size andquantity of the ports shall be determined by the flowand pressure requirements to meet the applicationfor which it is intended.
SLEEVEThe moving sleeve shall be manufactured ofstainless steel or bronze, providing long-life, non-galling operation. To ensure alignment, operation ofsleeve shall be made by means of a shaft with rigidlyattached external and internal guides.
MATERIALS Body: Ductile Iron BS EN 1563
ENGJS 500-7 Cover: Ductile Iron BS EN 1563
ENGJS 500-7 Ported Liner : Stainless Steel 8.8 Gr. 1.4401(316) Stem : Stainless Steel 8.8 Gr. 1.4401(316) Coating : Internal and external blue (RAL
5005) 2 pack epoxy to WIS 4.52.01Class B with DFT 250 microns
TESTINGThe valve shall be hydrostatically tested in the openposition at a pressure equal to 1.5 times the workingpressure. The valve shall be cycled from closed toopen three times for operational testing.
SIZINGThe size of valve is selected from the flows given intable on page 4.
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Features and benefits :
5.Cylindrical Sleeve :Hydraulic BalanceNo Differential LoadsLow Operating Effort
4/5.Annular Gap :No Wear, No FrictionLower Operating Effort Ideal for Modulation
4/5.Shaped Multiports :Near Linear Characteristic Can be customised Optimum flow change
4/5.Radial Inward Flow :Good Energy DissipationMinimum Wear / ErosionMinimum Cavitation Risk
FLUID MOVEMENT
11.Fine Screw Thread :Slow Speed OperationFine Adjustment Smooth Flow Transition
11.External Mechanism :Easy To MaintainSimple To LubricatePosition Visible
11.Vertical Motion :Good For ModulationLoad Taken In Gearbox Ideal Alignment
APPLICATION : In Line Flow Throttling
SLEEVE LINER
(For item number see component list on page 4)
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Valve characteristics
Cavitation guide
SERIES 855 (1400)Vertical Sleeve Flow Regulating Valve
Valve Headloss Coefficient Versus Valve Port Travel
1
10
100
1000
10000
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Valve Port Travel
V a l v e H e a d l o s s C o e f f i c i e n t k
2k = 2gh/v
where:-
k = Valve Headloss Coefficient
g = 9.81 m /s2
h = Valve Headloss in m
v = Velocity of flow based on valve nominal bore in m/s
Shut Full
OpenDD1036
Cavitation Guide
Control Valves
(Standard Porting)
0
20
40
60
80
100
120
140
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
Outlet Pressure (Metres Head)
I n l e t P r e s s u r e ( M e t r e s H e a d )
DD1261
Cavitation
Zone
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Component List
1. Body
2. Cover
3. Thrust Tube (F10 top flange)
4. Ported Liner
5. Ported Sleeve
6. Spindle
7. Bearings
8. Gland
9. Gland Packing
10. O Rings
11. Gearbox/ Actuator (extra)
12. Fasteners
5
89
10
11
12
4
7
6
1
2
3
A
B C
E
D
DS26/0206
Ref Nos.
855 0200 01000000
DN
200
250
300
350
400
450
500
600
700
800
900
1000
Dimensions (mm)
A
552
660
762
915
915
990
1220
1372
1525
1525
1830
1830
B
222
267
305
370
370
368
510
534
610
610
686
686
C
330
393
457
545
545
622
710
838
915
915
1144
1144
D
333
349
397
525
525
676
685
838
940
940
1048
1048
E Approx
1090
1140
1190
1250
1250
1600
1680
1705
1810
1915
2025
2025
Approx.Weight (kg)
212
330
513
885
885
1398
1850
2722
3494
4539
6352
6352
DischargeCapacity l/sec
110
172
250
325
440
555
680
990
1345
1760
2000
2500
855 0250 01000000
855 0300 01000000
855 0350 01000000
855 0400 01000000
855 0450 01000000
855 0500 01000000
855 0600 01000000
855 0700 01000000
855 0800 01000000
855 0900 01000000
855 1000 01000000
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www.glenfield.co.ukGLENFIELD VALVES LIMITED
QUEENS DRIVE, KILMARNOCK, A YRSHIRE, SCOTLAND, KA1 3XFT 44 (0) 1563 521 150 F 44 (0) 1563 545 616
Partners In The World
Continental Europe, Russia, South EasternEurope :AVK International A/S - DenmarkTel +45 8754 2100 Fax +45 8754 2120 www.avkvalves.com
AVK Sales Companies Europe:AVK Norge - Norway - www.avk.noAVK Mittelmann - Germany -www.avkmittelmann.comAVK Nederland - Netherlands - www.avknederland.nlAVK Belgium - Belgium - [email protected] Armadan - Poland - www.avk.com.plAVK France - France - [email protected] AVK Valvulas - Spain - [email protected]
UK and Ireland :Aqua-Gas AVK - England - www.aquagasavk.co.ukTel +44 1604 601188 Fax +44 1604 604818
M.&G. Ltd - Ireland - [email protected]
Tel +353 1451 1144 Fax +353 1451 1376
North America:American AVK Company - America -www.americanavk.comTel +1 559 452 4310 Fax +1 559 452 4349
Austral Asia:AVK Australia Pty Ltd - Australia -
www.avkvalves.com.auTel +61 88359 6166 Fax +61 88359 6417
The Middle East:Saudi Valves Manufacturing Co.Ltd. - Saudi Arabia -www.avk.com.saTel +966 2637 1570 Fax +966 2637 9380
Dutco Tennant - United Arab Emirates -www.dutcotennant.com
Dubai : Tel +971 4222 0186 Fax +971 4223 6193 Abu Dhabi : Tel +971 2634 8495 Fax +971 2551 5904 Al Ain : Tel +971 3721 9774 Fax +971 3721 9776
Arabi Company W.L.L. - Kuwait - [email protected] +965 472 4058 Fax +965 472 4059
Al Obeidly & Gulf Eternit Trading Co. Doha - Qatar [email protected] +974 469 4111 Fax +974 469 4449
Other Middle East markets being handled in coordination with:AVK Middle East - United Arab Emirates - [email protected] +971 4336 6396 Fax +971 4336 9908
Latin America and the Caribbean:AVK Ovearseas - Latin America [email protected] +1 559 451 0435 Fax +1 559 451 0437
Asia:Satria Damai Sdh - Malaysia/Brunei - [email protected] +603 7806 1415 Fax +603 7806 1412
Other markets :AVK Overseas Asia - Responsible Other Markets than
Malaysia/Brunei - [email protected] +603 3291 8270 Fax +603 3291 4257
China and Hong Kong:AVK Valves - China - [email protected] +86 21 5308 7733 Fax +86 21 5308 9989
Advance Trading & Eng Ltd. - Hong Kong [email protected] +852 2429 9808 Fax +852 2429 2921
Southern Africa:AVK Valves Southern Africa (Pty) Ltd. - South Africa
- [email protected] +27 44 4951 626 Fax +27 44 4951 310/459
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4.2006 Issue 1