Pneumatic control valve,Electric control valve,Pneumatic ball valve-Control valve manufacturer

contact us

SHANGHAI HUIXUAN VALVE

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

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

Low flow pneumatic control valve

Model:

  • Port size:DN15~25, NPS 1/2〞~ 1〞
  • Pressure:PN16 ~ 100,150LB ~ 600LB
  • Medium:Water,oil,steam,gas
  • Temperature :-40~450℃
  • Body material:WCB LCB CF8 CF3 CF8M CF3M
  • Description:
  • Low flow pneumatic control valve Feature

    Low flow pneumatic control valve is designed for micro flow medium .The compact body ofLow flow pneumatic control valve has an S-shape flow passage that features low pressure loss, allows a large flowcapacity,rangeability, and high accuracy flow characteristics.

    Low flow pneumatic control valve plugs are available in wide range of Cv values. The flow shut-off performance complies with the IEC or JIS standards. The actuator integrated with simplest mechanisms utilizes a compact yet powerful diaphragm actuator leaded with multiple springs.

    Low flow pneumatic control valve is widely applicable for reliable control of small flows in high or low temperature, high pressure process lines.

  • Low flow pneumatic control valve Specification

    Pneumatic control valve
    Body type:
    straight through casting globe type
    Spool type: non-balanced single seat plug type
    Nominal size: DN15~25,、 NPS 1/2〞~ 1〞
    Nominal pressure: PN16 ~ 100、 CLASS 150LB ~ 600LB
    Connection: flange: FF、RF、MF、RTJ
    Welding: SW、BW
    Flange dimension: According to to IEC 60534
    Low flow pneumatic 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
    Pneumatic control valve actuator: Pneumatic: multi-spring diaphragm actuator, piston type actuator.
  • Low flow pneumatic control valve Structure

  • PLow flow pneumatic control valve Material 

    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
    Gasket Normal:Stainless steel with flexible graphite,Special:Metal tooth type gasket
    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
  • Low flow pneumatic control valve Performance

    Low flow pneumatic control valve
    Flow characteristic
    Linear, percentage, quick open
    Allowable range 30: 1 
    Rated Cv value CV 0.01-1.0
    Pneumatic control valve Allowable leakage Metal seal:  IV grade(0.01% rated capacity)
    Leakage standard:  GB/T 4213
    Pnuematic micro flow 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
  • Low flow pneumatic control valve Special requirement

    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
  • Pnuematic micro flow control valve parameter

    Control Valve Type\ Method Pneumatic diaphragm actuator
    ZHA/B-22
    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 control valve
    Accessories
    E/P, P/P valve positioner, filter regulator, valve converter, solenoid valve, limited switch
    Non-standard accessories, need special customized notes.
  • Low flow pneumatic control valve technical parameter

    Rated flow coefficient Cv Equal percentage         0.25 0.1 0.4 0.63 1.0
    Linear 0.01 0.04 0.1 0.16 0.25 0.1 0.4 0.63 1.0
    DN Travel Option flow coefficient Cv(★ standard ●recommended ○customized) 
    DN15 16mm
    DN20
    DN25
    Pneumatic actuator ZHA/B-22
    Pneumatic diaphragm effective area,  Ae (cm2) 350
     

inquiry us

INQUIRY US

微信扫一扫

添加我为好友了解更多