Pneumatic Knife Gate Valve, Ductile Iron GGG40, 4 IN, CL150

Product Name: Pneumatic Knife Gate Valve
Type: Bidirectional Knife Gate Valve
Body Material: Ductile Iron GGG40
Size: 4 Inch, DN100
Pressure: Class 150 LB, PN10/PN16
End Connection: Wafer
Operation: Pneumatic Actuator
Temperature Range: -29°C to 120°C

The maintenance-free compact cross seal with a double-lip profile ensures a tight shutoff and can be adjusted without interrupting operation. A self-cleaning effect is provided by flush-out corners in the body and a cutting edge beneath the gate. Solids and fibers are cut by this edge before the gate seals against the elastic seat. The gate guidance is intentionally interrupted along the stroke length, allowing dirt to be expelled. Bidirectional shutoff is achieved through the combination of lateral gate surfaces and the elastic seat integrated into the body. The chambered, pre-stressed seat enhances sealing performance, while the high-quality finish of the guide and sealing surfaces on both sides ensures long service life and consistent tight shutoff. Lateral gate guidance prevents flutter in either flow direction or during throttling.

Technical Specification

» Structure: Bidirectional knife gate valve
» 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

Structural Diagram

Product Features

» Bidirectional
» Split Body
» Flatness knife
» Light torque
» Support yoke
» Epoxy coating-Fusion bonded paint
» Sealing type