Pneumatic flow regulating valve

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Model：

Pneumatic flow regulating valve description
Pneumatic flow regulating valve is a top entry globe type valve.The body of channel Pneumatic flow regulating valve is streamlined by S shape with low pressure loss, high capacity,wide regulating range, and high accuracy in flow characteristics. Pneumatic flow regulating valve plug features with guiding area and good vibration resistance. Pneumatic flow regulating valve is equipped with mult-spring diaphragm actuator and compact in structure as well as big in output force. Pneumatic flow regulating valve is designed to control a broad variety of fluids, like steam, water, most of the medium and gases.
Pneumatic flow regulating 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 regulating valve Body 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 flow regulating 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
Regulating control valve Actuator:	Pneumatic: multi-spring diaphragm actuator, piston type actuator.

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

Pneumatic flow regulating 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 regulating valve Allowable leakage	Metal seal: IV grade（0.01% rated capacity） Soft seal: VI grade（foam grade） Leakage standard: GB/T 4213
Pneumatic flow regulating 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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