Pneumatic diaphragm double seat control valve adopts double-guide structure, the body structure is compact, the fluid channel is S-streamlined, the pressure loss is small and the flow flux is large, the adjustable range is wide, the flow characteristic precision is high.Due to the top and bottom of the spool guide, it has the characteristics of anti-seismic and wear resistance.The control valve is equipped with multi-spring film actuator,which has small structure and large output force, and is more suitable for good stability, high reliability,high pressure, high pressure difference and good control under the process conditions ofthe fluid medium containing silt and easy to block.
Model：ZJHN
Size：DN25~200mm
Material of valve body: WCB,304,316,316L
Spool material: 304,316+STL\PTFE
Valve seat material: 304,316+STL;PTFE
Norminal Pressure：PN16; PN40; PN64MPa,Class150 - Class 600
Working Temperature： -17~450ºC
Connection: Flange, thread, welding
Seat type: single seat, double seat, sleeve
Bonnet type: standard, low temperature, heat dissipation, bellows seal type
Pneumatic actuators: multi-spring film actuators
Accessories: electric positioner, air filter pressure reducing valve, handwheel, protectionvalve
Application Range：Gas, liquid, steam, petroleum, chemical industry, power station.
Operation: Pneumatic Diaphragm, Pneumatic Piston, Electric Actuator
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.
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