Pneumatic piston-type quick cut-off valve

Description

Pneumatic piston-type quick cut-off valve

PNEUMATIC PISTON CYLINDER CONTROL VALVE DESCRIPTION
pneumatic piston cylinder control valve is piston actuator design for high pressue medium, pneumatic piston cylinder control valve is a top entry globe type valve with flange connection or welding connection and which is cage type seat.The body of channel pneumatic piston cylinder control valve is streamlined by S shape with low pressure loss, high capacity,wide regulating range, and high accuracy in flow characteristics. pneumatic piston cylinder control valve plug features with guiding area and good vibration resistance. pneumatic piston cylinder control valve is equipped with pistion actuator and compact in structure as well as big in output force. This pneumatic piston cylinder control valve is designed to control a broad variety of fluids, like steam, water, most of the medium and gases.
PNEUMATIC PISTON CYLINDER CONTROL VALVE FEATURE
Reduced trim can be chosen to provide wide capabilities for site applications
Balanced trims are suitable for high pressure drop and shutoff
Hardened trims to handle high pressure drop applications
Bellows seal for special medium
Extended bonnet for low temperature
Finned bonnet for high temperature
Higher maximum valve flow coefficients
Bigger body volume to reduce cavitations 

• PNEUMATIC PISTON CYLINDER CONTROL VALVE SPECIFICATION

  pneumatic piston cylinder control valveBody type:	straight through casting globe type
  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 piston cylinder control valve Bonnet type:	Ⅰ:standard type（-20℃~230℃） Ⅱ:Radiator type: （-45℃~ high than 230℃ occasion）
  Packing:	V type PFTE packing, flex. graphite packing, etc.
  Gasket:	Metal graphite packing
  control valve Actuator:	Pneumatic: piston type actuator.

• PNEUMATIC PISTON CYLINDER CONTROL VALVE MATERIAL 

  Component name	Control Valve Material
  Body/Bonnet	WCB/A105/WC6/WC9/CF8/CF8M/CF3M
  Valve spool/Seat	304/316/316L(overlaying stellite alloy)
  Packing	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

• PNEUMATIC PISTON CYLINDER CONTROL VALVE PERFORMANCE

  pneumatic piston cylinder control valve Flow characteristic	Linear, percentage, quick open
  Allowable range	50: 1 (CV<6.3 30: 1)
  Rated Cv value	Percentage CV1.6~630 ，linear CV1.8~690
  pneumatic piston cylinder control valve Allowable leakage	Metal seal:  IV grade（0.01% rated capacity） Leakage standard:  GB/T 4213
  pneumatic piston cylinder 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

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