A knife gate valve is also called a slurry valve or a mud pump valve. The moving direction of its disc is perpendicular to the fluid direction, and the medium is stopped by the disc (knife) which can cut through fiber materials.
In fact, there is no cavity in the valve body. And the disc moves up and down in the side guide slot and is pressed against the valve seat by the lug at the bottom. If higher sealing is required, the O-ring on the valve seat can be used for bidirectional sealing. The knife gate valve has small installation space, low working pressure, difficult accumulation of debris and low price.
When the knife gate valve is closed, the sealing surface can be sealed only by medium pressure. In other words, the sealing surface of the disc is pressed against the seat on the other side by medium pressure to ensure the sealing of the sealing surface, which is self-sealing. Most gate valves are forced to be sealed, namely, when the valve is closed, the disc must be forced against the seat by external force to ensure the sealing of the sealing surface. This kind of valve should be installed vertically in the pipe.
Driving means of knife gate valves: manual, sprocket, electric, pneumatic, hydraulic, bevel gear, etc.
The appearance of knife gate valves: rising stems and non-rising stems.
Materials of knife gate valves: cast iron, cast steel, carbon steel, stainless steel, etc.
The sealing of knife gate valves: hard sealing, soft sealing, single sided sealing, double sealing, etc.
The ultra-thin knife gate valve has the advantages of small size, low flow resistance, light weight, easy installation and disassembly, which completely solves the difficult problems of large flow resistance, heavy weight, difficult installation and large covering area of common gate valves, flat gate valves, ball valves, globe valves, regulating valves, butterfly valves, etc. After the appearance of knife gate valves, a large number of general cut-off valves and regulating valves have been replaced.
Scope of Application
1. Mining, coal washing and iron and steel industry.
2. Purification plant.
3. Paper industry.
4. Power station.
Nortech is one of the leading industrial valve manufacturers in China with quality certification ISO9001.
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Post time: Aug-08-2022