Wafer Butterfly Check Valve

We are offering wafer butterfly check valve. Dual disc wafer butterfly check valve
dn40-1200mm
pn(mpa): 1.0/1.6
api,ansi,astm,bs,din,jis,iso approved
1)working temperature: -25*c~120*c
2)applicable medium: fresh water, sewage, sea water, air, vapor, oils, gas etc.
3)materials:
body: gg25, ht200, wcb, ss304
plate: ggg40+epoxy
hinge stem: ss304
stop stem: ss304
body seat: viton
eye bolt: steel, carbon steel
spring bearing: ptfe
body bearing: ptfe
plug: steel, carbon steel
standard:
design standard: mss sp-67, api609, en593
flange end: din, ansi, bs, iso, jis.
top flange: iso5211
face to face: api609, iso5752 series 20, bs5155
test&check: api598.