Pneumatic high pressure steam control valve

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Pneumatic high pressure steam control valve feature
Pneumatic high pressure steam control valve is a kind of high differential pressure control valve with the pressure balanced cage structure. The trim cage and plug of Pneumatic high pressure steam control valve adopt a mixed multi-hole and tandem structure to make sure there is no occurrence of cavitation when saturated water passes the control valve. With the cage multi-stage throttling, the throttling area gradually increases, which meets the requirements for saturated water vaporization volume expanding, so that fluid velocity is reduced and erosion of trims by the fluids is lowered. The throttling part is separable from the sealing face to effectively protect the sealing face. The Pneumatic high pressure steam control valve trim surface is subjected to hardening treatment, reaching a hardness of about HRC70.Pneumatic HP heater drain control valve is featured by good erosion resistance and long service life. The valve is used for HP heater draining in thermal power plants and can also serve as a deaerator level control valve. The Pneumatic high pressure steam control valve can be pneumatically or electrically controlled.

Trim features：	multi-level, multi-hole cage balanced trim structure
Body type：	straight-through type
Bonnet type：	standard type heat dissipation type
Flow characteristic：	equal percentage linear
Size：	DN65-250(2.5”-10”)
Pressure class：	PN1.6、4.0、6.3、10Mpa（ANSI 150、300、600LB）
Leakage class：	ASME B16.104 Ⅴ（standard type metal seat）
Pipe connection type：	flange type butt welding type
Applicable temperature range：	less than 420C°
Actuator type：	pneumatic diaphragm actuator pneumatic piston actuator electric actuator

Component name	Control Valve Material
Body/Bonnet	WCB/WC6/WC9/CF8/CF8M/CF3M
Valve spool/Seat	304/316/316L(overlaying stellite alloy)
Packing	Flexible graphite
Gasket	Normal:Stainless steel with flexible graphite,Special:Metal tooth type gasket
Diaphragm Cover	Normal:Q235,Special:304
Diaphragm	NBR with reinforced polyester fabric
Spring	Normal:60Si2Mn,Special:50CrVa
Control valve stem	2Cr13/17-4PH/304/316/316L

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