Mobile:+86-17717520739
Wechat:17717520739
Email:info@shxvalve.com
Address: NO.720, Suide Road, Jiading District,Shanghai, China.
Model:
Pneumatic control valve Body type: |
straight through casting globe type |
Spool type: | balanced cage guided sleeve 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 pressure balanced 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 |
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 control valve Flow characteristic | Linear, percentage, quick open | |
Allowable range | 50: 1 | |
Rated Cv value | Percentage CV10~1400 ,linear CV11~1500 | |
Pneumatic pressure balanced control valve Allowable leakage |
Metal seal:Ⅱgrade(0.5% rated capacity) Soft seal: V grade Leakage standard: GB/T 4213 |
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Pneumatic pressure balanced control valve Performance | ||
Intrinsic error (%) | ±1.0 | |
Return difference(%) | ≤1.0 | |
Dead zone(%) | ≤1.0 | |
Difference from beginning to end point(%) | ±2.5 | |
Rated travel difference(%) | ≤2.5 |
Special test | Material penetration flaw detection (PT), radiator test (RT), flow characteristic test, low temperature test. |
Special treatment | Trim nitrogen treatment, seat hard alloy treatment. |
Special rinse | Degreasing and dehydration treatment |
Special condition | Special piping or connection, vacuum condition, S.S fastener, special coating. |
Special dimension | Customized face to face length or dimension |
Test and inspection | Third party test report |
Pneumatic control valve Type\ Method |
Pneumatic diaphragm actuator |
ZH23~ZH56 | |
Multi-spring type | |
Usage | Regulating type, ON-OFF type |
Air supply pressure or Power supply voltage | Air supply pressure (Spring range) 140(20~100)Kpa G 240 (40~200) Kpa G 280 (80~240) Kpa G |
Connector | Air pipe connector: RC1/4 |
Direct action | Pressure increase, stem descend, valve close. |
Reaction | Pressure increase, stem ascend, valve open. |
Input signal | 40~20mA.DC(with positioner) |
Lag | ≤1%FS(with positioner) |
Linear type | 2%FS(with positioner) |
Environmental temperature | -10℃~+70℃ |
Pneumatic pressure balanced control valve Accessories |
E/P, P/P valve positioner, filter regulator, valve converter, solenoid valve, limited switch Non-standard accessories, need special customized notes. |
Seat diameter(mm) | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | ||
Rated Cv | Percentage | 10 | 16 | 25 | 40 | 63 | 100 | 160 | 250 | 400 | 630 | 1000 | 1400 | |
Linear | 11 | 17.6 | 27.5 | 44 | 69 | 110 | 176 | 275 | 440 | 690 | 1100 | 1500 | ||
Nominal size | Travel | Option flow coefficient, Cv(★standard ●recommended ○customized) | ||||||||||||
DN25 | 16 mm | ★ | ||||||||||||
DN32 | 25 mm | ○ | ★ | |||||||||||
DN40 | ○ | ● | ★ | |||||||||||
DN50 | ○ | ● | ● | ★ | ||||||||||
DN65 | 40mm | ○ | ○ | ○ | ★ | |||||||||
DN80 | ○ | ○ | ○ | ● | ★ | |||||||||
DN100 | ○ | ○ | ○ | ● | ● | ★ | ||||||||
DN125 | 60mm | ○ | ○ | ○ | ★ | |||||||||
DN150 | ○ | ○ | ● | ★ | ||||||||||
DN200 | ○ | ○ | ● | ● | ★ | |||||||||
DN250 | 100mm | ○ | ● | ● | ★ | |||||||||
DN300 | ○ | ● | ● | ★ | ||||||||||
Pneumatic actuator,Diaphragm effective area, Ae (cm2) | ZHA/B-23 | ZHA/B-34 | ZHA/B-45 | ZHA/B-56 | ||||||||||
350 | 560 | 900 | 1600 | |||||||||||
Action | Spring range | Pneumatic pressure balanced control valve Metal seal allowable pressure difference(MPa) |
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Air to open | 20-100KPa | 3 | 2.25 | 2.25 | 1.95 | 2.36 | 2.04 | 1.67 | 1.41 | 1.41 | 1.14 | 0.65 | 0.55 | |
40-200 KPa | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 1.55 | 1.4 | ||
80-240 KPa | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 4.08 | 4.08 | ||
Air to close | 20-100KPa | 1.5 | 1.13 | 1.13 | 0.98 | 1.18 | 1.02 | 0.84 | 0.71 | 0.71 | 0.57 | 0.65 | 0.55 | |
40-200 KPa | 4.5 | 3.38 | 3.38 | 2.93 | 3.54 | 3.06 | 2.51 | 2.12 | 2.12 | 1.71 | 1.8 | 1.55 | ||
80-240 KPa | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 5.85 | 4.94 | 4.94 | 4 | 4.08 | 3.65 |