http://www.ka-valve.com/check-....valve/different-type
Product Description
Working principle of stainless steel flange check valve: The check valve automatically opens and closes the valve flap depending on the flow of the medium itself to prevent the backflow of the medium.
Execution standard and performance specification
Nominal diameterDN8-DN100, 1/2"-12"
Nominal pressurePN16
Shell strength test pressurePN2.4MPA
Low pressure air tightness test pressure0.8MPA
Applicable mediaWater, oil, gas, nitric acid, acetic acid
Design and Manufacturing StandardsANSI B16.34, GB/T-12224-2015
Test StandardAPI598, GB/T13927-2008, EN12516-3
thread standardG, BSP, BSPT, DIN259, DIN2999, ISO228, NPT, PT, ISO7/1
Stainless steel flange check valve main parts material table
valve bodyA216 (WC, A351 CF8, CF8M, CF3M, 321, 2205
valve plateSUS304, SUS316, SUS316L, SUS321, SUS2205
valve seatSUS304, SUS316, PTFE, RPTFE, M111, M1600, M1700, PPL
screwSUS304, SUS316