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Pressure relief Multifunctional water pump control valves 
Purpose
This valve is used mainly for water supply and drainage system and can be set on the pump outlet to prevent the pump from getting harmed the medium back flow. it can also be set on the mouth of a water outlet pipe to prevent the medium from backflow.
Features
Simple structure, reliable performance, long durable, open-close times can be up to over million ones, suitable for sewage.
Executive Standard
GB/T 9113.1
API 609 Category A
BS EN593/BS5155
Performance parameters
Nominal diameter:2"-24"/DN50-DN600
Working pressure:10Bar/16Bar/25Bar
Face-to-face: API 609 Table 1/ISO 5752 Series 20/BS 5155
Flange accommodation: ANSI B16.1 Class125/150
EN1092-2 PN6/10/16/25
Top Flange:ISO5211
Tightness Inspection: API 598/ISO 5208,/EN12226-2
Main part material
Body: Ductile Iron ,Cast steel, Stainless Steel
Disc: Ductile Iron ,Cast steel, Stainless Steel
Stem: Stainless Steel
Sealing ring: Stainless Steel/PTFE
Packing: Flexible Graphite/PTFE
