Pneumatic quick action on off/cut off valve specification
Pneumatic on off control valve |
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℃) |
Packing: |
V type PFTE packing, flex. graphite packing, etc. |
Gasket: |
Metal graphite packing |
Actuator: |
Pneumatic: multi-spring diaphragm actuator, piston type actuator. |
Pneumatic quick action on off/cut off valve Material
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 quick action on off/cut off valve performance
Pneumatic single seat control valve |
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) |
|
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 |