Balanced Safety Relief Valve (Bellows Type)
This is a pressure relief valve with bellows. The valve with bellows structure will reduce the effects of back pressure in discharge system. This is done by balancing the effects of the back pressure on the upper and lower surface of the disc. In addition, this balanced pressure relief valves are commonly used in where a very precise set pressure is required, and the bellows can
also isolate the spindle guide and spring from the medium when it is corrosive.
Design Standard
API520、API526
ASME Standard
GB/T 12241、GB/T12243、GB/T 29026、ISO 4126-1
Product Range
Caliber range：
US series:1/2"~20" GB series:DN15~DN500
Nominal pressure range：
US series:Class150~Class2500 GB series:PN10~PN420
Body Material:
Carbon Steel, Alloy Steel, Stainless Steel, Duplex-SS, Ni-Alloys, Others upon request.
End Connection:
Flanged, Threaded, SW-Welding, Butt-Welding
Applicable Temperature:
-196~650°C
