Pilot Drive Self-operated Differential Pressure Control Valve
V230Y 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: B 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
Working principle
V230Y command operated self-operated differential pressure control valve as shown in figure 1.It
guides the medium which is set on the tank top’s pressure tapping point to testing organization(7). The
medium contacting on the testing component will produce an acting force which is balance to the preset
pressure of spring. When the pressure in the tank fall to lower than Nitrogen supply equipment’s set
pressure, the balance will be broken ,so the monitor’s plug opened, and the gas from front valve goes
into actuator’s upper and lower case through pressure relief valve and throttle valve, at last it opens the
plug and fill gas to the tank; when the tank’s inside pressure up to air supply equipment’s set pressure,
preset spring make the monitor be closed. Due to the function of spring in the actuator, the plug closed
and stopped to supply the air.
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