Pneumatic steam jacketed control valve

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Pneumatic steam jacketed control valve Feature
Pneumatic steam jacketed control valve mainly applied to the occasions of thermal insulation,full the heat medium into the gap between valve body and metal jacket to keep thermal insulation and prevent fluid crystallization occurs, as well as the increase of viscosity, which due to the temperature reduction.
Pneumatic steam jacketed control valve muti-springs pneumatic reinforce actuator makes the control valve realize the conversion of normal close and normal open on site easily,the spring can be effectively protected from the corrosion to prolong the service life of control valve actuator and convenient for customers operation. The actuator of Pneumatic steam jacketed control valve and the intelligent control valve positioner are connected pipeless to strengthen the antisemitic performance,stability and precision adjustment, to meet to exactly control of the working conditions.

Pneumatic control valve Body type:	straight through casting globe type with jacketed
Spool type:	non-balanced single seat plug type
Nominal size:	DN20~200,、 NPS 3/4〞~ 8〞
Nominal pressure:	PN16 ~ 100、 CLASS 150LB ~ 600LB
Connection: flange:	FF、RF、MF、RTJ
Welding:	SW、BW
Flange dimension:	According to to IEC 60534
Pneumatic steam jacketed control valve Bonnet type:	Ⅰ:standard type（-20℃~230℃） Ⅱ:Radiator type: （-45℃~ high than 230℃ occasion） Ⅲ:Low temperature extended type（-196℃~ -45℃） Ⅳ:Bellow seal type Ⅴ:Warm insulation Jacket type
Packing:	V type PFTE packing, flex. graphite packing, etc.
Gasket:	Metal graphite packing
Pneumatic control valve actuator:	Pneumatic: multi-spring diaphragm actuator, piston type actuator.

Component name	Control Valve Material
Body/Bonnet	WCB/WCC/WC6/CF8/CF8M/CF3M
Valve spool/Seat	304/316/316L(overlaying stellite alloy)
Packing	Normal:-196～150℃ is PTFE,RTFE,>230℃ is 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

Pneumatic steam jacketed control valve Flow characteristic	Linear, percentage, quick open
Allowable range	50: 1 (CV<6.3 30: 1)
Rated Cv value	Percentage CV1.6~630 ，linear CV1.8~690
Pneumatic steam jacketed control valve Allowable leakage	Metal seal: IV grade（0.01% rated capacity） Soft seal: VI grade（foam grade） Leakage standard: GB/T 4213
Pneumatic steam jacketed control valve Performance
Intrinsic error %		±1.5
Return difference, %		≤1.5
Dead zone, %		≤0.6
Difference from beginning to end point, %		±2.5
Rated travel difference, %		≤2.5

Pneumatic steam jacketed control valve

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