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Knife gate valves

Knife gate valves


Knife gate valves

Knife gate valves are used as shut-off and isolation fittings in material handling systems. These simple devices, designed to work in difficult conditions are a support for the operation of many industrial installations.
Knife gate valves can be applied and used in the food industry, chemical idnustry, paperindustry, chemical plants, cement plants, mining and many other industrial applications.

These devices can be installed at the outlets of tanks, silos, mechanical feeders, under dry dedusting devices and wherever gases and dust are not aggressive and their temperature for the standard version does not exceed +80º C.

POSSIBILITIES OF CONTROL AND VERSIONS: hand / manual, electrical, pneumatic / hydraulic

Additional information

Information leaflet

Gate valves are characterized by a minimum pressure drop in the fully open position, they are easy to use and have a relatively low weight.

Knife gate valves should only be used in conditions requiring a fully open or fully closed position and should not be used to regulate the flow of the transported medium, unless intended for this purpose.


The knife gate valve consists of a body where in the middle, on pin guides, a plate (knife) adjusting the degree of opening of the gate cross-section moves. The passage of the plate through the body is sealed with a stuffing box. Knives and pins are made of stainless steel or acid-resistant stainless steel, which is characterized by even greater resistance to corrosion.


We can distinguish various types of knife gate valves: by the construction itself, by the manufacture material used and by the drive way. One of the most important parameters is, of course, the diameter. Despite the large diameter of the flange enabling installation on the pipeline, the gate valve itself has a relatively narrow body, and thus low weight. Thanks to this, knife gate valves take up little space between two sections of the pipeline and allow for optimization of the space occupied by industrial installations.

Manual control is carried out by steering wheel or a drive chain wheel that lowers or raises the knife. Pneumatic control is carried out by means of double-acting or single-acting pneumatic actuators.
Another type is the control of the electromechanical drive in the power supply versions 230-400V~ 50Hz.

With the use of pneumatic and electric drives, it is possible to add position sensors and connect them to the automation system.

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