Slurry Knife Gate Valve

A slurry knife gate valve is designed for abrasive, high-solids and viscous media where conventional isolation valves may experience accelerated wear. Slurry Knife Gate Valve Suppliers in South Africa supplies heavy-duty knife gate valves for mining, mineral processing, wastewater and industrial slurry systems. African Valve supplies slurry knife gate valves with wear-resistant gates and resilient or metal seating options.

Key Features

• Abrasive-Service Design: Suitable for mineral and solids-laden slurries.

• Sharp-Edged Gate: Cuts through suspended solids and fibrous material during closure. 

• Full-Bore Passage: Helps minimise flow obstruction when fully open.

• Replaceable Seats: Allows worn sealing components to be replaced.

• Wear-Resistant Options: Hardened gates and metal-seat configurations are available.

• Purge Options: Can be configured with ports for removing accumulated solids.

Technical Specifications

Materials & Components

• Body: Cast Iron / Ductile Iron / ASTM A216 WCB / ASTM A351 CF8M / Duplex

• Gate: SS304 / SS316 / Duplex / Super Duplex / Hardened Gate

• Seat: EPDM / NBR / PTFE / Metal

• Stem: SS304 / SS316 / SS410 / Duplex

• Packing: PTFE / Graphite

• Fasteners: Carbon Steel / Stainless Steel

Applications in South Africa

Slurry knife gate valves are suited to gold and platinum mining, mineral beneficiation, coal handling, tailings pipelines, phosphate processing, wastewater sludge and abrasive process lines, where solids concentration and particle abrasiveness can cause valve wear.

Standards

Applicable requirements include MSS SP-81, with EN 12266-1 / API 598 applicable to inspection and pressure testing Design Standards: AWWA C515, MSS SP-81, TAPPI TIS 405-10. Materials: ASTM A216 (body), ASTM A276 (gate). Testing: API 598, abrasion testing per ASTM G65. Quality: ISO 9001