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Wechat:17717520739
Email:info@shxvalve.com
Address: NO.720, Suide Road, Jiading District,Shanghai, China.
Model:
Pneumatic low noise control valve uses modular design and impact structure. Through the special symmetric holes on the cntrol valve trim, Pneumatic low noise control valve could reduce the noise and pressure, thereby preventing from flashing and cavitation,make it applicable for high pressure difference and low noise conditions to meet customers requirements. caged seat and compressing connection of the valve body,greatly enhance the sealing grade and service life of the control valve , which make it easy to repair and greatly increase the general performance of Pneumatic low noise control valve.
Pneumatic low noise control valve pneumatic actuator makes the control valve realize the conversion of normal close and normal open on site easily,the spring of the control valve can be effectively protected from the corrosion to prolong the service life of actuator and convenient for customers operation. The actuator 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 low noise control valve includes standard type,high temperature type,low temperature type,bellows sealing type etc.Nominal pressure:PN(Mpa)1.6,2.5,4.0,6.4,10.0(150lb,300lb,600lb);Nominal diameter:DN(mm)20~200(3/4”~8”);Fluid temperature range:-196~+560℃;Pneumatic low noise control valve Leakage class:IV,V,VI;Flow characteristic:percentage,linear.
Pneumatic control valve Body type: |
straight through casting globe type |
Spool type: | balanced cage guided type |
Nominal size: | DN20~300,、 NPS 3/4〞~ 12〞 |
Nominal pressure: | PN16 ~ 100、 CLASS 150LB ~ 600LB |
Connection: flange: | FF、RF、MF、RTJ |
Welding: | SW、BW |
Flange dimension: | According to to IEC 60534 |
Pneumatic low noise 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 | Pneumatic 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 low noise control valve Flow characteristic | Linear, percentage | |
Allowable range | 50: 1 | |
Rated Cv value | Percentage CV10~1400 ,linear CV11~1500 | |
Pneumatic low noise 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 low noise 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 low noise 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 low noise 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 |