Plastic hydraulic actuator butterfly valve 1.size:DN15,DN25,DN32,DN40,DN50 2.Standard:,ANSI, ... : upvc or cpvc2.Disc : upvc or cpvc3.stem :45#4.valve seat: EPDM5.O--ring: EPDM6.Handle : ABS7.Nut: CPVC OR ... .Positioning plate: 1Cr18Ni9Ti 9.Acid&alkaline resistance10.lower torque with any fluid11.Corrosion resistance12.Anti scour13.resilient seat design Plastic hydraulic actuator butterfly valve