Views: 0 Author: Site Editor Publish Time: 2021-09-08 Origin: Site
A lug butterfly valve is a kind of butterfly valve with a body that has “lugs” or hole protrusions around its circumference that provides passages for bolts. The orientation of the lugs around the lug butterfly valve body is engineered in such a way that matches the holes in flanges connecting to pipes for ease of installation and alignment. Normally, the lug butterfly valve is sandwiched between flanges and two bolts opposite each other are to be inserted in each hole, securing the valve.
What is the construction of lug butterfly valve?
When to use different lug butterfly valve?
What can lug butterfly valve be used for?
Disk: The disk of lug butterfly valve is the flow closure part of the butterfly valve, bored in the middle to receive the stem. The usual method of securing the disk to the stem is by bolts or pins.
Stem: The stem of lug butterfly valve extends beyond the bottom of the disk and fit into a bushing in the bottom of the lug butterfly valve. We designed different material bushings to suit differences in chemical properties of the media being handled by the valve. Stem seals are made of O-ring seals. For corrosive substances.
Seat: The seat of lug butterfly valve utilizes an interference fit between the disk edge and the seat to provide shutoff. The material of the seat can be made from many different elastomers or polymers. The seat may be bonded to the body or it may be pressed or locked in. In high-performance lug butterfly valves, the shutoff may be provided by an interference-fit seat design or a line-energized seat design, where the pressure in the pipeline is used to increase the interference between the seat and disk edge.
Both lug butterfly valve and wafer butterfly valve can be benefited when it comes to weight-saving. These are both lightweight as compared with other types of butterfly valve such as globe valve. However, wafer butterfly valves are lighter than lug butterfly valve as attributed by the number of lugs in the lug butterfly valve.
Also, both butterfly valves are easy to maintain and maintenance costs are usually low attributed to the minimal number of moving parts. Structurally speaking, they have no pockets trapping fluids. Unique advantages of lug butterfly valve are as follows:
l Lug butterfly valve is applicable for dead-end service.
l Lug butterfly valve can be used as an isolation valve.
l Lug butterfly valve is compactness in design which requires less space.
l Lug butterfly valve is quick in operation requiring less time to open or close.
l Lug butterfly valve is available in a variety of sizes.
l Lug butterfly valve has low-pressure drop, but high-pressure recovery.
l Lug butterfly valve is easier to clean, inspect, repair, or replace and plant shut down is not required as with wafer butterfly valves.
Lug butterfly valves are used in a number of applications for industrial sectors that include food processing, pharmaceutical, chemical, oil, water as well as waste water management. The lug butterfly valves utilized in these industries are generally manufactured in compliance with the Pharmaceutical Quality/Manufacturing Standard, CGMP (current good manufacturing practice) guidelines. Lug butterfly valves for the most part have replaced ball valves in a lot of industries. This is especially the case for those dealing with petroleum because lug butterfly valves are less expensive and easy to install. It's important to note that pipelines that contain lug butterfly valves cannot be pigged for cleaning.
In throttling, regulating control and mud medium, the structure length is required to be short and the opening and closing speed is fast. For low pressure cut-off with small pressure difference, it is recommended to use a lug butterfly valve.
When the lug butterfly valve is used under special conditions such as throttling adjustment, strict sealing requirements, severe wear, and low temperature, the triple-eccentric or double-eccentric butterfly valve needs a specially designed metal sealing belt adjustment device.
Learn more something about lug butterfly valve can know the construction of lug butterfly valve and the applications of 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.
