Pilot Drive Self-operated Differential Pressure Casted Steel Flanged RF Control Valve

Pilot Drive Self-operated Differential Pressure control valve, is composed of control valve body, actuator, positioning spring ,stainless steel bellows, external pressure tap and all that. The valve doesn’t requires any auxiliary energy from external supply sources, by use of medium itself pressure as motive power, it can automatically control and stabilize the medium pressure.This valve has high regulating accuracy . It is mainly used for keep ing the pressure of protecting gas (such as Nitrogen ) on tank’s top to be constant ,in ordert to avoid the material in the tank contacting with air,avoid volatilizing and oxygenizing of material and keep the safe of the tank.It is especially suitable for the various gas seal protection system!
V230Y command operated self-operated micro-pressure control valve is characterized by power saving, effectively handle, convenient to operate and maintain etc. It is widely used in the oil and chemical etc industrials.

Standard Specifications

Body Type :cast globe valve,(as shown in figure 1)
Nominal Diameter:DN20,25,32,40,50,65,80,100
Nominal Pressure: PN1.0,1.6MPa ANSI150 JIS 10K DIN PN16
End Connection:Flange HG20596-97M； ANSI B16.5 RF ；DIN2543/2544/2545RF；JIS B2201RF
Face to Face Dimension: according to GB/T12221-1989,EN558.1:1995,ISO5752-1982 basic series 1
Body Material: WCB,ZG0Cr18Ni9(CF8),ZG0Cr18Ni12Mo2Ti(CF8M)
Bonnet Type: STD type,-10～80℃ ；Medium temp type(with Every temperature tank ), ≤250℃；high temp type(with Every temperature tank and extensions),≤350℃Packing :V shape PTFE ,flexible graphite, o-rings
Seal gasket:Seal gasket:Metal winding gasket, metal graphite gaskets, zigzag gasket and flat gasket
Paint: Carbon steel shell surface required to paint, stainless steel or copper surface without paint .

Trim Plug type: cylinder plug
Flow characteristics: quickly opening
Plug material: 0Cr18Ni9(304),0Cr17Ni12Mo2(316)
Seat material: 0Cr18Ni9(304),0Cr17Ni12Mo2(316),304+F4,316+F4
Stem material: 0Cr17Ni4Cu4Nb(17-4PH),0Cr17Ni12Mo2(316)
Bellow material: 0Cr17Ni12Mo2(316),00Cr17Ni14Mo2(316L)

Actuator
Type : multi-spring diaphragm type
Pressure Regulating Range: please check table 1
Upper and Lower Case Material:A3,A4 With PTFE,0Cr18Ni9(304)
Diaphragm Rubber: NBR , EPDM , FPM and other oil-resistance rubbers
Spring material: 60Si2Mn
Work temperature:-20~80℃
Performance
Control Type: pressure relief type(B), pressure regulators type(K)
Rated CV:As shown in table 1
Seat leakage:Metal seat according to ANSI B16.104 ClassⅣ,less than10-4of Rated Cv ,PTFE seat according to ANSI B16.104 Class VI,less than10-7of Rated Cv
Pressure control accuracy ± 3%.
Working temperature:-10～350℃
Rated Travel: see table 1
Shape Size:As shown in figure 3 , table 2
Weight of product:As shown in table 2