Slurry Knife Gate Valves, GGG40, 8 Inch, 150 LB, Wafer

Key Specifications / Features

This Slurry Knife Gate Valve features a bidirectional, full-bore design with a ductile iron GGG40 body for strength and durability. With an 8-inch (DN200) size, Class 150 LB (PN10) pressure rating, and wafer ends, it is pneumatically actuated for reliable operation in slurry handling applications, ensuring efficient flow control and minimal leakage.

The integral slurry valve is a full-bore design, with the valve body’s flow channel entirely wrapped in wear-resistant polyurethane. This configuration prevents the flushing medium from coming into contact with the metal valve body, significantly extending its anti-wear life. The flow channel is consistent with the inner diameter of the pipeline, ensuring that the medium flows smoothly without generating eddy currents, thus reducing erosion. When fully opened, the valve plate lifts into the valve chamber, avoiding direct contact with the medium and effectively extending the service life of the disc.

Technical Specifications

Structure: Bidirectional Knife Gate Valve
Nominal Diameter: NPS 2-24 Inch (DN50-DN600)
Design Pressure: PN10, PN16, Class 150 LB
Temperature Range: -29°C to 120°C
Working Pressure: 10.3 bar (150 PSI)
Operating Pressure: 6.2 bar (90 PSI)
Body Material: GGG40, ASTM A351 CF8, CF8M, 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
End Connections: Wafer Type

Product Features

Self-Cleaning Disc Function: A self-cleaning valve plate scraper inside the sleeve automatically cleans the surface of the valve plate as it moves up and down. This prevents clumping and reduces switch torque or blockage.
Integrated Elastomeric Filler: The sealing filler is molded from wear-resistant, high-rebound rubber. It is tightly sealed with the stuffing box and polyurethane valve liner, providing superior sealing, extended lifespan, and easier replacement.
Self-Flushing Valve Seat Structure: The self-flushing design of the valve seat prevents sedimentation at the bottom, ensuring zero leakage each time the valve closes.
Easy Seat Replacement: The valve features a removable seat and upper sealing structure. If the liner or upper seal is worn during service, these parts can be replaced on-site, restoring the product to its original service life. Replacement costs are only 15-20% of the total cost of the valve.