Pneumatic 3 way mixing regulating/control valve body has the features as below:
Pneumatic 3 way control valve Body type: | 3-way casting globe type |
Spool type: | 3-way double seat spool |
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 3 way 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. |
Material list
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 |
Bellow | 304,316,316L |
Gasket | Normal:Stainless steel with flexible graphite,Special:Metal tooth type gasket |
Stem | 2Cr13/17-4PH/304/316/316L |
Diaphragm Cover | Normal:Q235,Special:304 |
Diaphragm | NBR with reinforced polyester fabric |
Spring | Normal:60Si2Mn,Special:50CrVa |
Valve performance
Pneumatic 3 way control valve Flow characteristic | Linear, percentage | |
Allowable range | 30: 1 | |
Rated Cv value | Percentage / linear CV8.5~1280 | |
Pneumatic 3 way regulating valve/control valve Allowable leakage |
Metal seal: IV grade(0.01% rated capacity) Leakage standard: GB/T 4213 |
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Pneumatic 3 way 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 |
Valve Special Requirment
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 |
Technical parameter
Seat diameter(mm) | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | ||
Rated flow coefficient, CV | 8.5 | 13 | 21 | 34 | 53 | 85 | 135 | 210 | 340 | 535 | 800 | 1280 | ||
Nominal size | Travel | Option flow coefficient Cv(★standard ●recommended) | ||||||||||||
DN25 | 16 mm | ★ | ||||||||||||
DN32 | 25 mm | ★ | ||||||||||||
DN40 | ● | ★ | ||||||||||||
DN50 | ● | ● | ★ | |||||||||||
DN65 | 40mm | ★ | ||||||||||||
DN80 | ● | ★ | ||||||||||||
DN100 | ● | ● | ★ | |||||||||||
DN125 | 60mm | ★ | ||||||||||||
DN150 | ● | ★ | ||||||||||||
DN200 | ● | ● | ★ | |||||||||||
DN250 | 100mm | ● | ● | ★ | ||||||||||
DN300 | ● | ● | ★ |