ThePipingMart Blog other What is Line Blind Valve? Properties, Uses and Application

What is Line Blind Valve? Properties, Uses and Application

Line Blind Valve

In any process industry, pipelines are vital in transporting fluids and gases from one point to another. However, problems may arise when there is a need to isolate the line for maintenance or modifications. In such cases, there may be better solutions than conventional valves. This is where line blind valves come in. They are an excellent alternative to traditional valves in critical applications where fluid flow must be restricted. This blog post will explore what a line blind valve is, its properties, uses, applications, and how to use it.

What is Line Blind Valve?

A Line Blind Valve is a flow control device used to isolate sections of pipe or tubing. It utilizes two plates that are designed to open and close when the handle is moved in either direction. This allows you to regulate the amount of flow, pressure, or temperature within the piping system without having to shut down an entire section. Additionally, it can be used as an emergency shut-off valve in case of a rupture or leaking pipe.

Properties of Line Blind Valve:

A line blind valve comprises a metal blind flange and a gasket. The blind flange is closed by a sliding gate comprising various materials such as stainless steel, brass, and more. The gasket is used to seal the blind flange to create an airtight seal. The valve’s design ensures that the fluid flow is blocked when the valve is closed. This is achieved by moving the sliding gate in and out of the valve’s body. Line blind valves are available in different sizes and shapes, covering a wide range of pipe diameters.

Uses of Line Blind Valve:

The conventional valve has been a reliable solution for sealing pipelines in different applications, but they are only sometimes practical. The line blind valve is a great alternative to conventional valves when there is a need to isolate the fluid quickly and without any external power. The valve can be used in various scenarios, including switching the lines between two different tanks, temporarily blocking the pipeline during repair or maintenance, diverting flow to a different path, and much more.

Application of Line Blind Valve:

Line blind valves are widely used in different industries, including oil and gas, chemical manufacturing, water treatment, pharmaceuticals, food processing, etc. They can be used in various applications, such as pipelines that transport water, oil, gas, slurry, and other fluids. In the chemical industry, line blind valves play a significant role in separating different products and materials during production.

How to Use Line Blind Valve:

To use a line blind valve, remove the sliding gate and gasket and attach the blind flange to the piping. Once the blind flange is securely attached, insert the new gasket into the blind flange. Slide the valve’s gate back and forth to ensure it functions correctly when it is time to shut the valve or block the flow in the pipeline, and slide the valve’s gate to cover the opening in the line blind valve body. The pipeline is now shut off from fluid flow, and the line blind valve is fully operational.


In summary, line blind valves are a reliable and efficient solution for isolating pipelines without using traditional valves. Their properties, uses, and applications make them valuable tools for various industries, including oil and gas, water treatment, and chemical manufacturing. Using line blind valves ensures pipeline isolation during maintenance, repairs, and temporarily blocking the pipeline. With this guide, you can become a pro at using line blind valves in your line of work.

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