info@shxvalve.cominfo@shxvalve.com
Tel:+86-17717520739
Email：info@shxvalve.com
Address: NO.720, Suide Road, Jiading District,Shanghai, China.
Model：ZJHPFa
PFA lined pneumatic control valve is composed of pneumatic diaphragm actuator,straight through single seat PFA (PTFE,FEP,PFA is optional) Lined structure.PFA lined pneumatic control valve contacted with the corrosive medium adopts the corrosion-resistant, anti-aging PFA, the high pressure lining fluorine plastic process.PFA lined pneumatic control valve is capable of controlling the flow of acid, alkali, aqua wang and other highly corrosive media, toxic volatile gas and liquid media.Therefore,PFA lined pneumatic control valve is widely used in chemical, metallurgy, medicine and other industries.
PTFE lined pneumatic control valve features as below:
1. Good corrosion resistance: the inner cavity of PFA lined pneumatic control valve body, core, seat are lined with 3mm thick PFA (PTFE,PEP,PRA is optional) , which can withstand strong corrosive fluid.
2. Good sealing performance: double sealing with PTFE bellows and packing.
3. The leakage quantity is little, because the PFA lined pneumatic control valve core and seat are soft seal, leakage was far below the national Ⅳ level standard.
4. High adjustment accuracy: PFA lined pneumatic control valve adopts precise and small pneumatic and electric actuators, small in size and light in weight.
| PFA lined pneumatic control valve Body type: |
straight through casting globe type PFA lined (PTFE,FEP,PFA is optional) |
| 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 |
| PFA lined pneumatic 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. |
| Component name | Control Valve Material |
| Body/Bonnet | WCB/CF8/CF8M/CF3M |
| Lined Material | PFA(PTFE,FEP,PFA is optional) |
| 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 |
| Z | Actuator | H | Structure | Nominal size | Body material | Bonnet type | Nominal pressure | |
| Z series control valve | J: pneumatic diaphragm actuator H: pneumatic piston actuator |
H:direct travel | PF: standard fluorine lined control valve PF4: PTFE lined control valve PF46: PEP lined control valve PFa: PFA lined control valve |
DN25= NPS1〞=25 DN50= NPS2〞=50 |
C=WCB LC=LCB P=CF8 PL=CF3 R=CF8M RL=CF3M D=special material |
Ⅰ:standard type（-20℃~150℃） |
PN16=16 CL150LB=150 LB JIS10K=10K |
|
| Such as: Z type Pneumatic control valve,,metal seat, PFA lined ,PN16, body: WCB, nominal size: DN50, type: ZJHPFa-50CⅠ-16 | ||||||||
| PFA lined pneumatic control valve Flow characteristic | Linear, percentage, quick open | |
| Allowable range | 30: 1 | |
| Rated Cv value | Percentage CV6.3~400 ，linear CV6.9~440 | |
| PFA lined pneumatic control valve Allowable leakage |
Soft seal: VI grade（foam grade） Leakage standard: GB/T 4213 |
|
| PFA lined pneumatic 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 | |
| PFA lined 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℃ |
| PFA lined pneumatic control valveAccessories | E/P, P/P valve positioner, filter regulator, valve converter, solenoid valve, limited switch Non-standard accessories, need special customized notes. |
| 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 | PFA lined pneumatic control valve Max. allowable pressure difference（MPa） |
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| 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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