Pneumatic 3 way mixing regulating/control valve body has the features as below:
1.compact structure, light weight, sensitive action, low pressure drop loss, new high allowable pressure, large valve capacity, accurate flow characteristics and convenient maintenance, etc.,
2.Pneumatic 3 way mixing regulating valve can be used for various working conditions, especially for the temperature control system of oil industry heat exchange and automatic control of other industries.
3.Spool structure with side guiding, well stability, no vibration, low noisy, Pneumatic 3 way mixing regulating valve can bear high pressure difference, easy for connection.
4.While with low nominal size and pressure difference, 3 way mixing regulating valve can be used in diverting occasion. However, while nominal size higher than DN100 and high pressure difference, Pneumatic 3 way mixting regulating valve and Pneumatic 3 way diverting regulating valve can’t be exchanged.
Specification
| 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 |
| 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 |
★ |
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| DN32 |
25 mm |
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★ |
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| DN40 |
|
● |
★ |
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| DN50 |
|
● |
● |
★ |
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| DN65 |
40mm |
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★ |
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| DN80 |
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● |
★ |
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| DN100 |
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● |
● |
★ |
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| DN125 |
60mm |
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★ |
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| DN150 |
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● |
★ |
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| DN200 |
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● |
● |
★ |
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| DN250 |
100mm |
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● |
● |
★ |
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| DN300 |
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● |
● |
★ |