Pilot Operated Gas Pressure Reducing Valve

Structure characteristic and purpose.
this series pressure reducing valve is pilot piston type pressure reducing valve,mainly composed of main valve and pilot valve.the main valve consists of valve seat,main valve disc,piston,cylinder liner and spring.the piston valve consists of valve seat,valve flap,membrane,spring and adjusting spring.set the outlet pressure through adjusting spring,sense the change of pressure of outlet with membrane,adjust the flow area of throttling part of main valve through open and close of pilot valve and drive the piston to realize the function of reducing and regulating valve.the product is mainly applied on gas piping,such as air,nitrogen,oxygen,hydrogen,liquefied gas and natural gas.
main technical parameters and indexes of performance.
nominal pressure(mpa) 1.6 2.5 4.0 6.4 10.0 16.0
test pressure of shell(mpa) 2.4 3.75 6.0 9.6 15.0 24.0
sealing test pressure(mpa) 1.6 2.5 4.0 6.4 10.0 16.0
maximum upstream pressure(mpa) 1.6 2.5 4.0 6.4 10.0 16.0
pressure range of outlet(mpa) 0.1-1.0 0.1-1.6 0.1-2.5 0.5-3.5 0.5-3.5 0.5-4.5
minimum differential pressure 0.15 0.15 0.2 0.4 0.8 1.0
medium gas,air,oxygen,nitrogen,etc.
Maximum operating temp. 80
*the shell test does not include membrane and top cover.
material of main component.
name of component material of component
valve body,valve cover,seat cover wcb
valve seat,valve disc 2cr13304
cylinder liner 25cr304
piston 2cr13copper alloy
piston ring alloy cast ironpolypheny1
pilot valve seat,pilot valve rod 2cr13304
membrane 1cr19ni9ti
spring of main valve and pilot valve 50crva
adjusting valve 60si2mn
sealing gasket(xf model) rubberptfe
pilot valve body,pilot valve cover 25304