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 |