Type: unidirectional (one way flow). Size: DN50 up to DN1000. Connection type: between flanges. Nominal pressure:PN6 up to PN25. Body material: cast iron (GG25), ductile iron (GGG40/GGG50), stainless steel (CF8M/SS316). Knife material: stainless steel (SS304/SS316). Temperature range: -50...+200°C. Seat: PTFE, NRB, EPDM, Silicone, FKM (Viton), Metal to metal. Standard: DIN, ANSI. Operation: handwheel, lever, chain wheel, electric/pneumatic/hydraulic actuator. Use: water, water treatment, chemical pulp, powders, food industry.