What are the common failures of lug butterfly valve?

The lug butterfly valve is connected between two pipe flanges with stud bolts. The structure of lug butterfly valve is simple, small in size and light in weight, which consists of only a few parts. Moreover, lug butterfly valve can be opened and closed quickly by rotating 90°. At the same time, the lug butterfly valve has good fluid control characteristics. When the lug butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is small.

 

Why we use lug butterfly valve?

What are the common failures of lug butterfly valve?

How to maintain lug butterfly valve?

 

Why we use lug butterfly valve?

Lug butterfly valve has small size with light weight.

Lug butterfly valve is easy to operate and install.

Elastic seal of lug butterfly valve is produced by torque.

The unique design of three-way eccentricity of lug butterfly valve enables frictionless transmission between the sealing surfaces and prolongs the service life of the lug butterfly valve.

The wedge-shaped design makes the lug butterfly valve have an automatic sealing function that is closer and tighter. The sealing surface has compensation and zero leakage.

The material of replacement parts of lug butterfly valve can be applied to various media.

The lug butterfly valve can be equipped with pneumatic and electric devices according to user requirements to meet the needs of remote control and program control.

The butterfly plate of the lug butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical passage of the lug butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0° and 90°. When the rotation reaches 90°, the lug butterfly valve is in a fully open state.

 

What are the common failures of lug butterfly valve?

Before installation, confirm whether the performance of lug butterfly valve and the arrow of the flow direction of the medium are consistent with the working conditions. The inner cavity of the lug butterfly valve is inserted and cleaned. No matter attached to the sealing ring and butterfly plate is allowed. It must not be closed before cleaning. Butterfly board, so as not to damage the sealing ring.

It is recommended to use the special flange for the lug butterfly valve.

The best position to install lug butterfly valve in the pipeline is vertical installation, but not upside-down installation.

It is necessary to adjust the flow when using lug butterfly valve, which is controlled by a worm gear box.

For the lug butterfly valve with a large number of opening and closing times, open the worm gear box cover in about two months to check whether the butter is normal. Keep a proper amount of butter.

Check the tightness of each connection part, which not only guarantees the sealing nature of the packing, but also ensures the flexible rotation of the lug butterfly valve stem.

The metal-sealed lug butterfly valve is not suitable for installation at the end of the pipeline. If it must be installed at the end of the pipeline, an outlet flange must be installed to prevent backlog and over-position of the sealing ring.

Check the lug butterfly valve periodically after installing lug butterfly valve, and promptly remove any faults found.

 

How to maintain lug butterfly valve?

We should first check whether the lubricator of lug butterfly valve is working properly and whether the viscosity of the lubricating oil is appropriate. If necessary, you can choose to replace the lubricating oil, clean the sliding part of the lug butterfly valve, and replace the spring.

Then we need to replace the sealing ring, valve stem and valve seat of lug butterfly valve in time.

Next, the sludge and impurities on the pilot valve and movable iron core of lug butterfly valve should be cleaned properly.

Before checking the working circuit of lug butterfly valve for faults, we should first turn the manual knob of the lug butterfly valve a few times to see whether the lug butterfly valve can achieve normal reversing under the rated air pressure. If it can change normally, the problem is that the circuit is faulty. During the inspection, the voltage of the electromagnetic coil can be measured with instrument technology to see if lug butterfly valve has reached the basic rated output voltage. If the voltage level is not too low, the power supply and the associated travel switch design circuit in the risk control module circuit should be further improved.

 

Learn more something about lug butterfly valve can know the common failures of lug butterfly valve and how to maintain lug butterfly valve. 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.