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Category: Gate, globe, and check valves

Standard and bolted bonnet all stainless steel knife gate valves for low emissions.

All stainless steel design.

Standard knife gate valves: NPS 2–24 (DN 50–600).

Bolted bonnet knife gate valves: NPS 4–24 (DN 50–600).

ASME Classes: 1690-4500.

0-14ph packing standard.

Locking device on standard knife gate valve.

Environmentally friendly bi-directional bolted bonnet and standard body styles.

Resilient and metal seats.

Leader in the manufacturing of knife gate valves, Tecofi has a comprehensive range able to respond to all needs and applications. This valve is mainly used for viscous products as the gate has a sharp edge thanks to an external chamfer.

Principle of Functioning

Our knife gate valve is constituted by a gate which slides in a narrow body. The upper part of the gate, in closed or opened position, stands out from the body.

The gate is sharp thanks to a chamfer of extremity. The polishing of faces facilitates the penetration of the gate in the product. At the end of valve closing, the gate is stuck to the joint to assure the seat tightness. The gland packing guarantees the internal tightness of the valve.

This technology of our knife gate valve is particularly adapted for difficult using conditions such as thick or pow – dery products.

Traditional gate valves contain important retention zones. Also thick or powdery products prevent the good functioning of the wedge. Our knife gate valves with the upper gate part always out of body can always open and being sharp always can close with sharp edge.


Pulp production.

Water, water treatment, waste water.

Chemical industry: powdery or crystallizing products.

Brewery industry: wine-producing.

Pulverized products: cement work, pneu -matic transport, stocking.


Function ON/OFF or regulation.

Wafer threaded mounting.

Unidirectional tightness, direction indication thanks to the arrow on the body.

Small retention zone: the gate is guided in the body and has little clearance.

Gland assembly: packing and O-ring (same materials as seat joint) to assure the elasticity and decrease the operating torque.

Small head loss.

Possibility to regulate thick fluids with the adaptation of a diaphragm ring.

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