Chinese wholesale Pneumatic Control Valve For Steam - Pneumatic quick action on off/cut off stainless steel valve – Hoyee

Pneumatic on off control valve
Body type:

straight through casting globe type

Spool type:

non-balanced type or balanced 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 On Off 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

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 single seat control valve
Flow characteristic

quick open

Allowable range

50: 1 (CV<6.3 30: 1)

Rated Cv value

Percentage CV1.6~630 ，linear CV1.8~690

Pneumatic control valve Allowable leakage

Metal seal:  IV grade（0.01% rated capacity）
Soft seal:  VI grade（foam grade）
Leakage standard:  GB/T 4213

Pneumatic On Off 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