How to fix lug butterfly valve?

Lug butterfly valves are throttling valves that turn in a quarter-turn rotary motion. Lug butterfly valves control the media flow in a system. The operators use these lug butterfly valves in different media and applications. When you operate a lug butterfly valve, it has a similar principle to a ball valve, that allows a fast shut off.

What is the working principle of lug butterfly valve?

How to fix lug butterfly valve?

How to check lug butterfly valve?

What is the working principle of lug butterfly valve?

The body of lug butterfly valve covers and protects the internal parts of the butterfly valve. The seat of lug butterfly valve covers the inner edge of the walls of the valve. The disc lodges to the seat when the valve is in the closed position.

The disc of lug butterfly valve is thin in the middle. Together with the seat, it seals off the flow of media when the lug butterfly valve is used for isolation. For the control of flow, the disc moves to partially open or close, allowing a certain amount to pass through.

The lug butterfly valve is one of the few industrial valves that are both efficient in isolating and regulating the flow of media. The lug butterfly valve is also quick to open. The disc is attached to the stem, either through the former or the stem is at the back of the disc. The stem is attached to the handle that is either placed on top of the body or at its side.

How to fix lug butterfly valve?

The lug type butterfly valve and the lug-on butterfly valve are in the same valve form. They are just different names. Lug butterfly valves have the advantage that the distance between the pipes at both ends is short. The "lug" here refers to the valve connecting the pipe flanges at both ends with a gold hoop. The lug type butterfly valve is a butterfly valve that is distinguished according to the connection method. The butterfly valve is connected by a flange type butterfly valve or a welded butterfly valve. Some small-diameter butterfly valves have lugs and some are not, which is determined by the design of each manufacturer. However, the large-diameter butterfly valve generally has a lug.

When the lug type butterfly valve and the pipe are installed, the flanges of the two sides are respectively installed with bolts. The sealing surfaces of the lug butterfly valve body and the valve body are not squeezed by the bolts, which is beneficial to the sealing life.

How to check lug butterfly valve?

The lug butterfly valve must be strictly examined and tested before leaving the factory. When testing the sealing performance of a lug butterfly valve, the two sides of the inlet and outlet are evenly fixed, and then the lug butterfly valve is closed and the inlet end of the lug butterfly valve is pressed. End observation is not a leak. If you want to do a strength test on the lug butterfly valve on the pipe, the butterfly plate of the lug butterfly valve should be in the open state to prevent the pressure from destroying the valve sealing pair.

In addition, after the lug butterfly valve is shipped from the factory, it is necessary to pay attention to it during transportation, and it is not possible to bump the lug butterfly valve. Before the installation, check all the components of the lug butterfly valve. Confirm whether the lug butterfly valve performance and parameters purchased are in accordance with the working conditions of the circulating medium of the pipeline. If it is found to be inconsistent, it must be replaced with the manufacturer in a timely manner. It is worth noting that when purchasing the lug butterfly valve product, it must be their own needs and work. Say it clearly so as not to cause unnecessary trouble.

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