Pneumatic steam three way control valve

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Model：

Pneumatic steam three way control valve feature
1.Pneumatic steam three way control valve is compact structure, light weight, sensitive action, low pressure drop loss, new high allowable pressure, large valve capacity, accurate flow characteristics and convenient maintenance, etc.,
2.Pneumatic steam three way control valve can be used for various working conditions, especially for the temperature control system of oil industry heat exchange and automatic control of other industries.
3.Spool structure with side guiding, well stability, no vibration, low noisy, Pneumatic steam three way control valve can bear high pressure difference, easy for connection.
4.While with low nominal size and pressure difference,Pneumatic steam three way control valve can be used in diverting occasion. However, while nominal size higher than DN100 and high pressure difference,mixting control valve and divertinging control valve can’t be exchanged.

Pneumatic three way control valve Body type:	three way casting globe type
Spool type:	three way double seat spool
Nominal size:	DN20~300 NPS 3/4〞~ 12〞
Nominal pressure:	PN16 ~ 100、 CLASS 150LB ~ 600LB
Connection: flange:	FF、RF、MF、RTJ
Welding:	SW、BW
Flange dimension:	According to to IEC 60534
Pneumatic diverting three way 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.

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
Bellow	304,316,316L
Gasket	Normal:Stainless steel with flexible graphite,Special:Metal tooth type gasket
Stem	2Cr13/17-4PH/304/316/316L
Diaphragm Cover	Normal:Q235,Special:304
Diaphragm	NBR with reinforced polyester fabric
Spring	Normal:60Si2Mn,Special:50CrVa

Pneumatic three way control valve Flow characteristic	Linear, percentage
Allowable range	30: 1
Rated Cv value	Percentage / linear CV8.5~1280
Pneumatic control valve Allowable leakage	Metal seal: IV grade（0.01% rated capacity） Leakage standard: GB/T 4213
Pneumatic steam three way 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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