Cast iron cast steel ss 304 ss 316 body ss 304 ss 316 disc nitrile metal to metal seat knife edge gate valve wheel gear pneumatic cylinder operated....
Russian Standard Carbon Steel 20# Pn16 Pn25 Pn40 Pn63 Gate Valve Standard Design  Standard Gost Face  to   Face Gost 12815-80 Flange  Standard Gost 12815-80 Testing  Standard Gost...