Pneumatic control valve 4-20mA signal

Pneumatic control valve 4-20mA signal Product introduction

　Pneumatic control valve 4-20mA signal is composed of control valve and positioner for 4-20mA signal input and output control,Pneumatic control valve 4-20mA signal applicable for low leakage requirement;Pneumatic control valve 4-20mA signal adopts pressure-balanced spool structure, allowed large pressure differential, low noise and steady and reliable actuation;Actuator of Pneumatic control valve 4-20mA signal adopts multi-spring circular equal layout, using high strength rubber diaphragm actuation parts,with small structure and large output force.

Pneumatic control valve 4-20mA signal feature:

Body type	straight through casting globe type
Spool type:	balanced cage guided sleeve type
Nominal size:	DN15~600,、 NPS 1/2〞~ 24〞
Nominal pressure:	PN16 ~ 100、 CLASS 150LB ~ 900LB
Connection: flange:	FF、RF、MF、RTJ
Welding:	SW、BW
Flange dimension:	According to to IEC 60534
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
Actuator:	Pneumatic: multi-spring diaphragm actuator, piston type actuator.

Pneumatic control valve 4-20mA signal 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

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Pneumatic control valve 4-20mA signal

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