Product Description

Product Introduction

Knife gate valve (also known as knife-type gate valve, slurry valve, or slide gate valve) is a linear stroke forced-sealing shut-off valve. Its core component is a flat gate plate with a knife edge, whose movement direction is perpendicular to the medium flow direction. It cuts off media containing particles, fibers, and viscous substances through the shearing action of the gate plate. The valve body has no traditional gate valve cavity, featuring an ultra-thin structure and a straight-through flow path. It is specially designed for media prone to clogging, such as slurry, pulp, mine tailings, dust, and sewage.

Technical Specifications

 Nominal Diameter: DN 50 ~ 1200mm (standard); DN15 ~ 2000mm (customized)

 Nominal Pressure: PN 0.6 / 1.0 / 1.6 / 2.5 MPa; 150LB / 10K

 Applicable Temperature

o Soft seal: -20 ~ 120

o Hard seal: -40 ~ 425

 Connection Standards: GB / JB / HG / ANSI / DIN / JIS

 Test Standards: GB/T 13927 (Body: 1.5PN; Seal: 1.1PN)

 Leakage Class: Soft seal Class VI (zero leakage); Hard seal Class IV

Main Component Materials

 Valve Body

o Cast Iron (HT200/250): Sewage, low-pressure service

o Carbon Steel (WCB): General industrial, medium and high pressure service

o Stainless Steel (304/316/316L): Chemical, food processing, highly corrosive service

o Duplex Steel / Titanium Alloy: High corrosion, special working conditions

 Gate Plate

o Stainless Steel (304/316), Carbon Steel, Hard Alloy Overlay (wear-resistant)

 Seal

o Soft: EPDM, NBR, Viton, PTFE

o Hard: 304/316, Stellite Alloy, Hard Alloy

 Stem: 2Cr13, 304, 316, Titanium Alloy

Product Features

1. Knife-type Gate Plate: With a beveled edge, capable of cutting fibers, particles, and sludge to prevent clogging.

2. Straight-through Full Flow Path: Extremely low flow resistance, no dead corners, no material accumulation.

3. Ultra-thin Structure: Compact size, light weight, small installation footprint.

4. Reliable Sealing: Zero leakage with soft seal; high temperature resistance and wear resistance with hard seal.

5. Multiple Actuation Options: Manual / Electric / Pneumatic / Hydraulic, compatible with automatic control systems.

6. Easy Maintenance: Simple structure, seals can be replaced online.

7. Cost-Effective: Lower price than gate valves / ball valves, ideal for slurry applications.