Ductile Iron GGG40 Knife Gate Valve, 20 IN, CL150, Pneumatic

Key Specifications / Features

The Ductile Iron GGG40 Knife Gate Valve is engineered for bidirectional shutoff, offering reliable flow control in demanding industrial settings. Featuring a 20-inch (DN500) size, Class 150 LB (PN16) pressure rating, and flanged ends for secure connections, this valve is built for durability and ease of installation. Equipped with a pneumatic actuator, it ensures efficient, automated operation, making it ideal for systems requiring quick, reliable valve actuation.

The maintenance-free compact cross seal with a double-seal lip profile ensures a tight shutoff and allows adjustment without interrupting operation. A self-cleaning effect is achieved through flush-out corners in the body and a cutting edge beneath the gate, which slices through solids and fibers before sealing against the elastic seat.
The gate's interrupted guidance along the stroke length enables dirt ejection, while bidirectional shutoff is ensured by the lateral gate surfaces and the integrated, pre-stressed chambered seat. The high-finish guide and sealing surfaces on both sides enhance durability and sealing performance. Additionally, lateral gate guidance prevents fluttering in both flow directions and throttle positions, ensuring stable operation.

Technical Specifications

» Nominal Diameter: NPS 2–16 Inch (DN50–DN400)
» Design Pressure: PN10, PN16, Class 150 LB
» Temperature Range: -29°C to 120°C
» Max Working Pressure:
  DN50–DN250: 10 bar
  DN300–DN450: 7 bar
  DN500–DN600: 4 bar
» Body Material: GGG40, ASTM A351 CF8, CF8M, Special Alloys, etc.
» Disc Material: Stainless Steel, Chrome Plated, Special Alloys, etc.
» Seat Material: EPDM (120°C), NBR (80°C)
» Flange Standard: GB/T 9113.1, JB/T 79.1, HG 20592, ASME B16.5, EN 1092-1
» Face-to-Face: MSS SP-81
» Operation: Manual, Pneumatic, Electric, Hydraulic

Product Features

» Bidirectional operation
» Split body design
» Flatness knife for efficient cutting
» Low torque operation
» Support yoke for added stability
» Epoxy coating with fusion bonded paint for durability
» Reliable sealing type for tight shutoff