WZJHP pneumatic film bellows regulating valve

Pneumatic bellows regulating valve Overview:
The pneumatic bellows seal regulating valve is composed of multi-spring pneumatic film actuator and bellows seal regulating valve body. The valve cover uses bellows plus packing double seal, which fundamentally eliminates the possibility of medium leakage. It is suitable for the flow pressure control of extremely quality, flammable, explosive and volatile, and toxic or precious media, and can also be used in vacuum occasions.
Pneumatic bellows regulating valve features:
The pneumatic bellows seal regulating valve is to add a layer of protective film outside the sealing element to prevent the corrosive medium from directly contacting the sealing element, and when the medium pressure increases, the bellows will expand and reduce the impact of the medium on the sealing surface. In highly corrosive medium conditions, double bellows structure can also be used to seal.
Pneumatic bellows regulating valve parameters:
Valve body
V-type through cast valve
Nominal diameters 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200mm
Nominal pressure PN16, 40, 64bar
Flange standard JB/ T791-94, 792-94, etc
Material cast steel (ZG230450), cast stainless steel (ZGICr18Ni9Ti, ZGICr18Ni12M02Ti), etc
Upper valve cover standard type: -17-230 ° C Heat dissipation type: 230-450 ° C Low temperature type: -60--196 ° C bellows seal type: -40-350 ° C
Valve cover form bolt pressing type
V-type PTFE packing, asbestos packing containing impregnated polytetracyanoethylene, asbestos textile packing, graphite packing
Structure form bellows seal
Valve inner assembly
Spool type Single seat plunger type, cage type guide, sleeve balance spool
Flow characteristics such as percentage characteristics and linear characteristics
Material stainless steel, stainless steel stele alloy, titanium and corrosion resistant gold, etc
Pneumatic bellows regulating valve actuator:
Actuator
V-type ZHA/B multi-spring film actuator
Type ZHA/B-22 ZHA/B-23 ZHA/B-34 ZHA/B-45 ZHA/B-56
Effective area cm2 350 350 560 900 1400
Stroke mm 10, 16 25 40 40, 60 100
Spring range KPa 20-100 (standard) 20-60 60-100 40-200 80-240
Diaphragm material Butadiene rubber sandwich nylon cloth, ethylene propylene rubber sandwich nylon cloth
Air supply pressure 140-400KPa
Air supply interface RCl/4"
Ambient temperature -30-70 ° C
 

Pneumatic film bellows regulating valve

Valve action form
Gas close (B) - Valve position open when air is lost (FO); Air open (K) - Valve position is open when air is lost (FC)
Accessories
Positioner, air filter pressure reducer, holding valve, stroke switch, valve position transmitter, handwheel mechanism, etc