◆The initial position of acting plug after valve is normally opened, and it will be closed when pressure
differential increases, and used mostly to control the pressure differential of media between two pipes
to ensure a certain proportioning.
◆The initial position of acting plug before valve is normally closed, and it will be opened when pressure
differential increases, and used mostly to control the pressure differential of the same pipe before and
after valve to ensure flow control.
◆Pressure setpoint can be field controlled within the range of pressure regulation.
◆This series of valve with a balance structure adopts self-balanced double sealing-face cage or double-
seal plug as throttling component which is suitable for the condition of big pressure drop.
◆Actuator adopts rubber diaphragm as detecting element featuring small resistance, quick response
and high precision adjustment. A very slight variation in pressure can be detected by diaphragm.
◆Type of Valve: self-operated
◆Nominal Dia: DN20～DN300
◆Pressure Rating: Class150，300
◆Body Material: ZG230-450、ZG1Cr18Ni9Ti、ZGCr18Ni12Mo2Ti
◆Flow Cv: 7~1925
◆Flow Characteristic: quick opening
◆Precision adjustment: ±5~10
Hard seal: ANSI Class II, ANSI Class IV
Soft seal: ANSI Class IV, ANSI Class V, ANSI Class VI
◆End Connections: flanged
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