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SHANGHAI HUIXUAN VALVE

Mobile:+86-17717520739
Wechat:17717520739
Email:info@shxvalve.com

Address: NO.720, Suide Road, Jiading District,Shanghai, China.
 

Pneumatic teflon lined control valve

Model:

  • Port size:DN20~300, NPS 3/4〞~ 12〞
  • Pressure:PN16 ~ 64,150LB ~ 300LB
  • Medium:Corrosive medium
  • Temperature :-40~180℃
  • Body material:WCB,CF8,CF8M
  • Description:
  • Pneumatic teflon lined control valve Feature

    Pneumatic teflon lined control valve  is especially suitable for very corrosive media under low pressure and normal temperature service conditions.FEP / PTFE / PFA Pneumatic teflon lined control valve is a suitable and economic valve for corrosive application.

    Pneumatic teflon lined control valve is composed of pneumatic diaphragm actuator,straight through single seat PTFE (PTFE,FEP,PFA is optional) Lined structure.Pneumatic teflon lined control valve contacted with the corrosive medium adopts the corrosion-resistant, anti-aging PTFE, the high pressure lining fluorine plastic process.Pneumatic teflon lined 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, Pneumatic teflon lined control valve is widely used in chemical, metallurgy, medicine and other industries.

  • Pneumatic teflon lined control valve Specification 

    Pneumatic teflon lined control valve 
    Body type:
    straight through casting globe type
    PTFE 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
    Pneumatic teflon lined 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.
  • Pneumatic teflon lined control valve structure

  • Pneumatic teflon lined control valve material

    Component name Control Valve Material
    Body/Bonnet WCB/CF8/CF8M/CF3M
    Lined Material PTFE(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
  • Pneumatic teflon lined control valve performance

    Pneumatic teflon lined control valve Flow characteristic Linear, percentage, quick open
    Allowable range 30: 1
    Rated Cv value Percentage CV6.3~400 ,linear CV6.9~440
    Pneumatic teflon lined control valve 
    Allowable leakage
    Soft seal:  VI grade(foam grade)
    Leakage standard:  GB/T 4213
    Pneumatic teflon lined 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
  • Pneumatic teflon lined control valve  actuator parameter

    Pneumatic teflon lined control valve 
    Type\ Method
    Pneumatic diaphragm actuator
    ZH23~ZH56
    Multi-spring type
    Pneumatic control valve 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 teflon lined control valve 
    Accessories
    E/P, P/P valve positioner, filter regulator, valve converter, solenoid valve, limited switch
    Non-standard accessories, need special customized notes.
  • Pneumatic teflon lined control 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 PTFE lined pneumatic 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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