Two Way Sealing Pneumatic Knife Gate Valve

The one-piece knife gate valve features a precision-cast integral body and a U-shaped elastic seat, providing reliable two-way sealing with zero leakage. Its non-groove seat design prevents medium accumulation and ensures smooth operation with low friction, extending the valve’s service life. Widely used in sewage treatment, papermaking, and mining applications.

Designed for demanding industrial conditions, this knife gate valve offers bi-directional sealing and zero leakage performance. The precision-cast body and rubber O-ring ensure durability and tight sealing, while the elastic U-shaped seat minimizes wear and friction. Ideal for wastewater treatment, pulp and paper, and slurry handling systems.

Features

One-piece knife gate valve has two-way sealing, zero leakage, withstands high pressure difference, and can reach maximum flow.
Non-groove valve seat design prevents accumulation of medium, avoiding leakage or gate jamming.
Precision casting integral structure valve body.
U-shaped elastic valve seat embedded in valve body, matches gate plate for low friction and long service life, achieving two-way sealing.
Rubber O-ring embedded in flange groove for easy connection and reliable sealing.
Widely used in urban sewage treatment, papermaking, and mine slag discharge.

Technical Parameters

Nominal diameter	DN50-1200 2″-48″
Pressure Level	0.6MPa,1.0MPa,1.6MPa,2.5MPa
Pressure Level	ASME CLASS150	DN50~250 10Bar DN300~400 6Bar DN450 5Bar DN500~600 4Bar DN700~1200 2Bar
Proper Temperature	-20℃~+170℃
Leakage level	Zero leakage

Product Features

Two-Way Sealing & Zero Leakage

The one-piece knife gate valve is designed with bi-directional sealing and ensures zero leakage. It can withstand high pressure differences and maintain full bore flow, achieving maximum flow capacity under demanding conditions.

Non-Groove Valve Seat Design

The smooth valve seat without grooves prevents medium accumulation on the sealing surface, effectively avoiding leakage or gate jamming caused by material build-up.

Precision Casting Valve Body

The valve body adopts an integral precision casting structure, providing superior strength, durability, and dimensional accuracy.

Elastic U-Shaped Valve Seat

The U-shaped elastic valve seat is embedded in the valve body to match the gate plate perfectly. The gate plate moves up and down with low friction, greatly extending the service life of the valve seat while maintaining two-way sealing performance.

Reliable O-Ring Sealing

A rubber O-ring is embedded in the flange groove, ensuring an easy and secure connection between the valve and pipeline with high sealing reliability.