Diaphragm valve pneumatic actuator PTFE PFA Lined
Diaphragm valve pneumatic actuator PTFE PFA Lined
Pneumatic PTFE PFA Lined diaphragm valve specification
| Pneumatic PTFE PFA Lined diaphragm control valve Body type: |
straight through casting globe type Fluoride (PTFE,FEP,PFA) lined |
| Spool type: | non-balanced single seat plug 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 PTFE PFA Lined diaphragm control valve Bonnet type: |
Ⅰ:standard type（-29℃~150℃） |
| Packing: | V type PFTE packing, flex. graphite packing, etc. |
| Gasket: | Metal graphite packing |
| Actuator: | Pneumatic: multi-spring diaphragm actuator, piston type actuator. |
Material List
| Component name | Control Valve Material |
| Body/Bonnet | WCB/CF8/CF8M/CF3M |
| Lined Material | PTFE,FEP,PFA |
| Control Valve spool/Seat | 304/316/316L Lined PTFE/FEP/PFA |
| Packing | PTFE |
| Gasket | PTFE |
| 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 |
Valve performance
| Pneumatic PTFE PFA Lined diaphragm control valve Flow characteristic | Linear, percentage, quick open | |
| Allowable range | 30: 1 | |
| Rated Cv value | Percentage CV6.3~400 ，linear CV6.9~440 | |
| Pneumatic PTFE PFA Lined diaphragm control valve Allowable leakage |
Soft seal: VI grade（foam grade） Leakage standard: GB/T 4213 |
|
| Pneumatic PTFE PFA Lined diaphragm 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 actuator specification
| Pneumatic fluorine lined control valve Type\ Method |
Pneumatic diaphragm actuator |
| PZMA-4~ PZMA-7 | |
| 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 PTFE PFA Lined diaphragm control valve Accessories | E/P, P/P valve positioner, filter regulator, valve converter, solenoid valve, limited switch Non-standard accessories, need special customized notes. |
Valve technical parameter
| Nominal size, DN | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | ||
| Rated flow coefficient, Cv | Percentage | 8 | 12 | 20 | 32 | 50 | 70 | 100 | 200 | 240 | ||
| Linear | 5 | 10 | 16 | 25 | 38 | 63 | 80 | 120 | 220 | 300 | ||
| Travel | 16mm | 25 mm | 40mm | 60mm | ||||||||
| Pneumatic actuator Diaphragm effective area, Ae (cm2) |
ZHA/B-22 | ZHA/B-23 | ZHA/B-34 | ZHA/B-45 | ||||||||
| 350 | 350 | 560 | 900 | |||||||||
| Action | Spring range | Pneumatic PTFE PFA Lined diaphragm control valve Max. allowable pressure difference（MPa） |
||||||||||
| Air open | 20-100KPa | 1.16 | 0.7 | 0.44 | 0.28 | 0.18 | 0.17 | 0.11 | 0.07 | 0.07 | 0.05 | |
| 40-200 KPa | 3.34 | 2.14 | 1.31 | 0.84 | 0.53 | 0.51 | 0.33 | 0.21 | 0.22 | 0.15 | ||
| 80-240 KPa | 6.4 | 4.99 | 3.05 | 1.95 | 1.25 | 1.18 | 0.78 | 0.5 | 0.51 | 0.36 | ||
| Air close | 20-100KPa | 2.23 | 2.14 | 0.87 | 0.56 | 0.35 | 0.34 | 0.22 | 0.14 | 0.15 | 0.1 | |
| 40-200 KPa | 6.4 | 6.4 | 5.86 | 3.64 | 2.3 | 2.21 | 1.43 | 0.91 | 0.95 | 0.66 | ||
| 80-240 KPa | 6.4 | 6.4 | 6.4 | 5.04 | 3.18 | 3.06 | 1.98 | 1.26 | 1.32 | 0.92 | ||
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