Advantages and purpose
However the upper pressure changes, it always keeps the preset pressure. The range of pressure adjustment is big and the valve hasn′t impingement of the water hammer and can replace the middle water box.
For the pipe network applications of industrial water supply, fire fighting and domestic water.
Standard and regulation
Flange connection dimension: GB/T 17241.6-1998, GB/T 9113.1-2000
Nominal pressure: PN0.6MPa, PN1.0MPa, PN1.6MPa, PN2.5MPa
Nominal diameter: Diaphragm type DN20～450mm, Piston type DN500～900mm
Suitable medium: Water
Suitable temperature: ≤80℃
Inspection and test: GB/T12245, GB/T 13927, API598
Body material: Cast iron, Ductile cast iron, Carbon Steel, Stainless steel
Adjustable pressure limits PN(MPa):

1.0 　0.09~0.8MPa
1.6　 0.10~1.2MPa
2.5　 0.15~1.6MPa