How does lug butterfly valve work?

The lug butterfly valve is somewhat similar to a 3-piece ball valve where one end of the wire can be removed without affecting the opposite side. Lug butterfly valve can be done by using threaded inserts, flanges and two sets of lugs that do not use nuts, as each flange has its own bolt. Lug butterfly valve is thus convenient to clean, inspect, repair or replace the lug butterfly valve because you do not need to shut down the entire system.

 

What is the structure of lug butterfly valve?

How does lug butterfly valve work?

What should be paid attention to when using lug butterfly valve?

 

What is the structure of lug butterfly valve?

Lug type butterfly valves use bolt length, which is equal to standard bolt length plus nut length plus butterfly valve thickness plus spring pad thickness plus flat pad thickness and a little margin. Generally, the bolt length is calculated according to the matching flange. The bolt hole of the lug butterfly valve is matched with the thread and is installed by a full-threaded stud bolt. One of the nuts is removed, the bolt is twisted into the bolt hole of the lug butterfly valve, and then the nut is tightened.

There are two holes on the lug butterfly valve. There are also through holes and internal threads. If it is a through hole, the bolt will grow long and pass through. The function of lug butterfly valve is to position the valve pipe coaxially when it is installed. Simply put, it is convenient to install with these holes. The lug butterfly valve is tightened by bolting the two flanges together to produce a clamping force. The caveat here is that a flange has eight holes but the valve does not have to have eight holes. Generally speaking, there are four holes and two holes. Internal threads, short bolts, installed on both sides of the valve.

Such a valve should be referred to as a single-lug butterfly valve because such valves are typically mounted at the end of the pipe. At this time, the pipe has only one flange, and the valve is fixed on the pipe by the fastening force generated between the bolt and the threaded hole on the valve. Generally, all holes of the lug type butterfly valves are threaded holes. Through holes are only used at the request of the customer.

 

How does lug butterfly valve work?

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.

 

What should be paid attention to when using lug butterfly valve?

The lug butterfly valve should be stored in a dry, ventilated room, and both ends of the valve channel should be blocked.

Lug butterfly valves stored for a long time should be checked regularly to remove dirt. Special attention should be paid to the cleaning of the sealing surface of lug butterfly valves to prevent damage to the sealing surface.

Before installation, carefully check whether the lug butterfly valve mark is equal to the use requirement.

Before installation, check the lug butterfly valve channel and sealing surface. If there is dirt, wipe it with a cleaning cloth.

Before installation, check whether the packing is tightly pressed. The sealing of the packing should be ensured and the rotation of the valve stem should not be hindered.

During installation, the tightening force of the connecting bolts of lug butterfly valve should be even and appropriate.

The lug butterfly valve can be installed on horizontal and vertical pipelines. The installation position should ensure that it is easy to use, maintain and replace.

When the manual valve is opened or closed, the handle should be used to open and close, and no auxiliary bar or other tools should be borrowed.

The use of the lug butterfly valve should be checked regularly to check whether the sealing surface is worn or not and the gasket packing. If the damage fails, it should be repaired or replaced in time.

 

Learn more something about lug butterfly valve can know the structure of lug butterfly valve and how does lug butterfly valve work. In the process of butterfly valve development, a number of very powerful companies have emerged, such as Tianjin Worlds Valve Co., Ltd. Our company knows how to innovate while developing, and will also go out in the process of introducing lug butterfly valve. Whether from quality or price, or delivery time, we can help customers to open up a further and larger market, it is wise to choose us as your business partner.