What is a Knife Gate Valve?

Knife gate valves are an essential component of many industrial and municipal water systems. They are designed to be durable and easy to operate, making them a popular choice for many applications. Get more news about through conduit gate valve,you can vist our website!

In this article, we will take a closer look at the features, applications, and advantages of knife gate valves to help you understand how they work and why they are a popular choice for industrial and commercial operations.

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How does a knife gate valve work?

A knife gate valve is a type of valve that is used to control the flow of liquids, slurries, and other similar materials in industrial and commercial applications. These valves are known for their durability and reliability and are commonly used as an industrial control valve in a wide range of operations, including mining, power generation, water treatment, and more.

The unique design of a knife gate valve features a stainless steel knife that moves up and down to open or close the flow of the media. Its gate is connected to a hand wheel or an actuator, which is used to open and close the valve. When the valve is open, the gate is raised, allowing the media to flow through, and when the valve is closed, the gate is lowered, blocking the flow.

Additionally, knife gate valves can be actuated by hand wheel, pneumatic, hydraulic, electric, and electro-hydraulic actuators. They can be made for bidirectional flow or unidirectional flow, and a wide range of pressure and temperature ranges.
What are the different types of knife gate valves?

There are several different types of knife gate valves, each with its own unique characteristics and features. Some of the most common types include:

Conventional Knife Gate Valve: Designed with a simple gate or wedge-shaped disk that moves up and down to open or close the flow of material. Also known as a traditional knife gate valve.
Bonneted Knife Gate Valve: Features a bonnet (a removable cover), which is typically secured to the valve body by a number of bolts. Used to protect the internal components of the valve from damage and wear.
Through Conduit Knife Gate Valve: Its gate passes through the body of the valve, rather than being located on one side of the valve. Allows for a larger flow area and less pressure drop.
Push-Through Knife Gate Valve: Its gate is pushed through the valve body to open or close the flow of material. Its design helps prevent blockages.
Severe Service Knife Gate Valve: Specifically designed to withstand high pressure, extreme temperatures, high flow rates, and heavy debris. Typically made from high-grade, corrosion-resistant materials.
Rising Stem Knife Gate Valve: Features a stem that rises and lowers as the valve is opened and closed.
Non-Rising Stem Knife Gate Valve: Its stem does not move in relation to the valve body and is instead connected to a hand wheel or an actuator.
Wafer Knife Gate Valve: Has a typically smaller and thinner body meant to be installed between two pipe flanges.