block gate valve 1.Material:Stainless steel 2.Driven:Pneumatic,Motor-driven,Manual 3.Madium:Water,Oil block gate valveThis valve is specially installed ... can be made optionally according to different requirement.- Direct pass gate, no jam, no slag, open and close flexible.- Short ... in sealing and anti-corrosion- Drive method can be: Manual, Pneumatic, electric and electric-hydraulic. block gate valve