Knife Gate Valve

Overview

Knife gate valves get their name from their ability to cut through solid-containing mediums. They operate by elevating a circular or rectangular gate out of the media’s path. Knife gate valves are commonly utilized when a straight-line fluid flow with minimal restriction is required.

The sealing surfaces between the gate and seats are flat. Knife gate valves were created with the pulp and paper industry in mind. Stringy pulp impinged between the wedge and seat of a standard gate valve, blocking flow shut-off. The material is chopped up as it passes through the valve, which is how they work.

Products

Specifications

Sizes Range

• DN 50(2”) to DN 1000 (25”)

Pressure Rating

• PN3 (45 PSI), PN6 (90 PSI) and PN10 (150 PSI) depending upon housing material, primarily for liquid applications. • CL 150

Design Standards

• MSS SP 81

Testing Standard

• API 598

Operations

Manual

•  Bare-shaft, hand wheel , chain wheel & Gearbox.

Automation

• Electric, Pneumatic, and Hydraulic Actuators.

End Connection

Scope

Flange Drilling

ANSI B16.5 class150,

Wafer, Lugged, Flanged

BS4504 PN10/PN16,

DIN2501 PN10/PN16

Special Features

• Unibody design and rugged heavy duty construction ensures long valve life and greater reliability.

• Flexible two-piece sleeve system allows valve to cycle in heavy slurries without sticking.

• Sleeves are easily replaced without disassembling the valve.

• Full port design reduces pressure drop and turbulence.

• Wafer style saves pipeline space.

• Open bottom allows for the purging of large solids and solids in high concentration.

• Sleeves are available in a variety of materials to handle abrasion and chemical applications.

Shutoff Rating

• Zero Leakage for Soft Seated & Metal Seated as per API 598 or relevant STD.

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