Pneumatic Double-Seated Control Valve (GAZJHN)
Product Description
GAZJHN Pneumatic diaphragm double-seated control valve.
The valve has double seats.The fluid outflow through the valve core of the upper and lower sealing surface.The unbalanced pressure is small.It is a balanced structure,which are widely used in petroleum,chemical,pharmaceutical,metallurgical,power plants,such as the industrial sector,to control of gas liquid medium such as steam.
Specification
Valve Body.
Structure:flowing through type globe valve with double-seated.
DN:25~300mm.
PN:1.6~10.0Mpa or class 150~class 600.
Connections:flanged type.
Material:WCB,HT200 ZG230-450 ZG1Cr18Ni9Ti.ZG0Cr18Ni12Mo2Ti.
Upper Cover.
Normal Temp:-20°C~+200°C.
Heat Radiation Type:-40°C~+450°C.
Gland Connection:bolted type.
Packing:V type PTFE.FLEXIBLE GRAPHITE.S.S BELLOWS.
Valve Assembly.
Valve Core:Double guiding&double-seated plug type.
Cv Features:Linear,Equal Percentage or Quick opening.
Material:1Cr18Ni9Ti0Cr18Ni12Mo2Ti.
Actuator.
Model:Multi-spring diaphragm type actuator
Material of the diaphragm:NBR with reinforced polyester fabric.
Spring range:0.02~0.1/0.04~0.2Mpa.
Air Supply:0.14/0.16/0.28Mpa.
Air Supply Connector:M10*1.
Working Temp:-30~+70°C.
Valve Acting Type:air to close or air to open.
Accessories:positioner,,hand wheel.
Parameters:(with positioner.)
Leakage:<0.5%×Kv.
Intrinsic Erro:+/-1.5%.
Controlling Range:30:1.
Product Details
Pneumatic Double Seated Control Valve Dimension.
| DN |
Actuator |
H |
øA |
H1 |
L |
| Normal TEMP |
Heat Radiator Type. |
PN1.6 |
PN4.0 |
PN6.4 |
| 25 |
ZHA22 |
498 |
648 |
285 |
117 |
185 |
190 |
205 |
| 32 |
ZHA22 |
501 |
651 |
285 |
120 |
200 |
210 |
220 |
| 40 |
ZHA22 |
522 |
691 |
285 |
139 |
220 |
230 |
240 |
| 50 |
ZHA22 |
530 |
699 |
285 |
144 |
250 |
255 |
265 |
| 65 |
ZHA34 |
645 |
815 |
363 |
188 |
275 |
285 |
295 |
| 80 |
ZHA34 |
661 |
835 |
363 |
208 |
305 |
310 |
325 |
| 100 |
ZHA34 |
687 |
887 |
363 |
220 |
350 |
355 |
370 |
| 125 |
ZHA34 |
1234 |
1444 |
363 |
270 |
410 |
425 |
440 |
| 150 |
ZHA45 |
1242 |
1492 |
470 |
280 |
450 |
460 |
475 |
| 200 |
ZHA45 |
1394 |
1654 |
470 |
320 |
550 |
560 |
570 |
Product Parameters
Kv,Movement&Allowable Differential Pressure.
| DN(mm) |
25 |
32 |
40 |
50 |
65 |
80 |
100 |
125 |
150 |
200 |
| Size of seat(mm) |
15 |
20 |
25 |
32 |
40 |
50 |
65 |
80 |
100 |
125 |
150 |
200 |
| Flow coefficient Kv |
4 |
6.3 |
10 |
16 |
25 |
40 |
63 |
100 |
160 |
250 |
400 |
630 |
| Movement(mm) |
16 |
25 |
40 |
60 |
| Allowable differential pressure(Mpa) |
5.8 |
4.9 |
3.8 |
2.9 |
4.0 |
3.3 |
2.6 |
3.6 |
3.0 |
2.3 |
| Note:It refers to the differential pressure when the valves in open position. |
View of the factory
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