Electric Knife Gate Valve

Electric Knife Gate Valve is an industrial automated shut-off valve that employs an electric actuator to drive a sharp,blade-like gate for vertical linear movement,perpendicular to the fluid flow direction.Designed specifically for challenging media containing solids,fibers,or slurries,it provides reliable on/off control with exceptional cutting and anti-clogging capabilities.

Working Principle

The core component is a thin,beveled-edged gate driven by an electric actuator.Upon receiving an electrical signal(AC 220V/380V or DC 24V),the actuator's motor converts rotational motion into linear force via a gear reduction system.This lifts or lowers the gate to fully open or close the flow path.The sharp gate cleanly severs fibrous materials and cuts through thick,particle-laden media,preventing the valve from jamming.

Key Design Features

Knife-edge Gate:Precision-machined from stainless steel or alloy steel with a sharp,inclined blade(5°–50°angle)for efficient cutting.

Compact&Low-flow Resistance:Unobstructed,full-bore design minimizes pressure loss and prevents material buildup.The slim profile saves installation space.

Superior Sealing:Utilizes resilient seats(PTFE,EPDM)or metal-to-metal seals for bi-directional,zero-leakage shut-off.Spring-loaded packing ensures long-term stem sealing.

Electric Actuator:Integrates motor,gearbox,and control module.Supports remote control,position feedback,and integration with PLC/DCS systems.Available with manual override for power failures.

Material Versatility:Valve bodies available in cast iron(WCB),carbon steel,and stainless steel(304/316)for corrosion and abrasion resistance.

Technical Specifications

Size Range:DN50(2")to DN2000(80")

Pressure Rating:PN6,PN10,PN16,Class 150

Temperature Range:-20°C to 300°C(depending on materials)

End Connections:Wafer,Lug,Flanged

Actuator Options:On-off type,Modulating type,Explosion-proof certified

Primary Applications

Ideal for handling difficult media in demanding industries:

Mining&Minerals:Slurries,tailings,and ore processing.

Pulp&Paper:Stock,black liquor,and recycled fiber.

Wastewater Treatment:Sludge,raw sewage,and dewatering processes.

Power Plants:Ash handling,bottom ash,and flue gas desulfurization(FGD).

Chemical&Process:Abrasive slurries,polymers,and viscous fluids.

Advantages

Efficient Cutting:Eliminates clogging in fibrous/solid-laden flows.

Automation&Control:Enables remote operation and smart system integration.

Space&Energy Efficient:Compact,lightweight,low torque requirement.

Durable&Low Maintenance:Robust construction with easy seal replacement.

Reliable Sealing:Positive shut-off even in abrasive conditions.