Plastic hydraulic actuator butterfly valve 1.size:DN15,DN25,DN32,DN40,DN50 2.Standard:,ANSI,JIS,DIN,HG 3.Media:oil,gas,water 1.Body : upvc or cpvc2.Disc : upvc or cpvc3.stem :45#4.valve seat: EPDM5.O--ring: EPDM6.Handle : ABS7.Nut: CPVC OR UPVC8.Positioning plate: 1Cr18Ni9Ti 9.Acid&alkaline resistance10.lower torque with any fluid11.Corrosion resistance12.Anti scour13.resilient seat design ...