Definition of a lug butterfly valve: The lug butterfly valve is named for the lugs on both ends of its valve. The lugs of the valve can be fixed to the pipeline to prevent the valve from wobbling or falling off when in use and can also act as a seal. The sealing performance of the lug butterfly valve is very good, which can prevent leakage, and it also has good flow characteristics with low flow resistance, which will not affect the flow of the pipeline. The lug butterfly valve is widely used in the pipeline system of chemical, petroleum, metallurgy, water treatment, electric power, food, and other industries and is a cost-effective valve product. The lug butterfly valve can be driven by manual, electric, pneumatic, and other driving methods, which can be selected according to different working conditions. In addition, the lug butterfly valve can achieve two-way sealing; that is to say, good sealing performance can be achieved in both positive and negative directions. What are the advantages of the lug butterfly valve? Simple structure: The structure of the lug butterfly valve is relatively simple, consisting of a few parts, making disassembly and maintenance relatively easy and reducing maintenance...
Why is it necessary to install and set up an air vent in a water supply pipe? Air venting valves are essential for pipelines as they are used to quickly remove gas from the pipeline, to improve the efficiency of water conveyance equipment and to protect the pipeline from deformation and rupture. It is installed at the outlet of the pump or in the water distribution line to remove a large amount of air from the pipe to improve the efficiency of the water pipe and pumping machine, and in case of negative pressure in the pipe, the valve can quickly suck in air to keep the line damaged by negative pressure. When the pump stops working, negative pressure will be generated at any time and the float will drop at any time to ensure the safety of the pipeline by sucking in a large amount of air. When the air is discharged, the float pulls down one end of the lever due to gravity, when the lever is in a tilted state, a gap appears in the contact part of the lever and the air discharge hole. The air is discharged through this gap by the...
Introduction If you’re getting a new pipe installed, you might have noticed there are different types of valves available. Some of them are much easier to install than others. In this article, we’ll walk you through the process of installing a lug butterfly valve—a type that’s designed to be easy and quick. 1. Disconnect the power. In order for you to safely install a lug butterfly valve, you will need to disconnect the power. This is because the lug butterfly valve is water and electrical hazard. To be safe, you should completely shut down any power to the valve and make sure all water connections are unplugged from their respective valves. 2. Unscrew the lug valve from the pipe. You can use various types of wrenches to unscrew the lug valve from the pipe. The most common options are: ①A wrench with a single handle that turns in either direction ②A wrench with two handles, one on each end (this is sometimes called a “combination” or “offset” wrench) ③A crescent wrench, which has the same shape as a pipe wrench except it’s small and can fit into tight spaces You may also be able to use ratcheting wrenches, which have...
Introduction: A butterfly valve, also called a flap valve, is a simple structure of the regulating valve, that can be used for low-pressure pipeline media switch control of the butterfly valve refers to the closing member (valve flap or butterfly plate) for the disc, rotating around the valve shaft to achieve the opening and closing of a valve. The valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil, liquid metal, and radioactive media. The pipeline mainly plays a cutting-off and throttling role. The butterfly valve opening and closing member is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to open and close or regulate the purpose. The butterfly valve is usually less than 90° from fully open to fully closed, and the butterfly valve and the butterfly stem itself have no self-locking ability, so for the positioning of the butterfly plate, a worm gear reducer is added to the stem. The use of a worm gear reducer can not only make the butterfly plate have the self-locking ability and make the butterfly plate stop at any position, but also improve...
Introduction: The wafer-type metal seat butterfly valve is one of the most commonly used valves in industrial applications. The unique design of this valve allows for easy installation and maintenance. It has a large area for disc movement, which makes it possible to control flow with less effort compared to other types of butterfly valves. Wafer Type Metal Hard Seal Butterfly Valve Usage: Clamped hard seal butterfly valve with precision J-shaped elastic seal ring and three eccentric multi-level metal hard seal structure, is widely used in the medium temperature <425 ℃, gold, electric power, petrochemical, as well as water supply and drainage and municipal construction and other industrial pipelines, for the regulation of flow and fluid cut-off use. The main features of the wafer-type hard seal butterfly valve The main features of the clamp-on hard seal butterfly valve are suitable for various different media such as water, steam, oil, air, gas, etc. The main features of the clamp-on hard seal butterfly valve are: 1. The butt-clamp metal multi-level sealing butterfly valve butt-clamp connection structure is simple, easy to install and disassemble, and heavy star by its characteristics. Metal hard seal butterfly valve adopts three eccentric sealing structures, the seat and...
Butterfly valve selection, first of all, according to successful engineering practice, relevant laws, and regulations, choose the appropriate structure, material, and pressure level to ensure that the butterfly valve is safe and reliable. Structure type ①The flow characteristics of the butterfly valve are approximately linear, whether it is midline type or eccentric type, the difference is not very big. The midline type is suitable as a regulating and small diameter process valve. ②How to choose double eccentric and triple eccentric butterfly valves, both structures have the characteristics of being able to disengage quickly and close tighter and tighter, so how to choose the two structures? As a soft seal with double eccentric, it is more convenient in processing and manufacturing. The triple eccentric is more complicated to process and manufacture, but it is more prominent in the tightening characteristics, and it is not easy to produce interference, so it is more suitable for metal hard seals. At present, there is no comprehensive analysis in the market, that what is recommended to use three eccentric metal hard seal is not right, especially on the large-diameter room temperature water system is recommended use, there is no need. Because the metal hard seal...
How does the electric butterfly valve work? The electric butterfly valve is composed of an electric actuator and butterfly valve, so it has the advantages of easy operation and simple structure of butterfly valve and is also widely used in chemical, pharmaceutical, and other industries. And because of the assistance of electric actuators, the development of butterfly valves has reached a new level. The working principle of the electric butterfly valve: The valve stem is driven by the electric device to make the butterfly plate produce a 90° rotary motion to achieve the opening and closing of the valve. The principle of the electric actuator is actually very simple. Just like a razor used in daily life, the energy source is electricity, and the electricity drives the operation of the valve plate, so as to open and close the valve and circulate or cut off the fluid. The electric actuator of the electric butterfly valve can be divided into switch type and adjustment type. The switch type electric butterfly valve plays the role of a switch; and the adjustment type electric butterfly valve plays the role of regulating the flow, which can accurately adjust the flow to thousands of degrees....
What is a JIS flanged butterfly valve？ The flange butterfly valve is a type of butterfly valve, which refers to the butterfly valve connected to the flange connection. It is a very versatile valve, as well as another type of butterfly valve with a clamp connection. Compared with other types of valves, such as flange gate valve, flange globe valve and flange ball valve, flange butterfly valve structure is very simple, only flanged body, stem, disc, seat, driving device and so on a few parts. In addition, compared to other valves, the flange butterfly valve has a smaller size and lighter weight, which is more suitable for making large diameter valve. With the improvement of manufacturing technology, the flange butterfly valve can be used in more and more working conditions, not only can be used to adjust the flow, but also can be used to cut the flow, gradually began to replace the flange gate valve, globe valve, ball valve and other applications in the pipeline system. Advantages of the JIS flanged butterfly valve： 1.Electrostatic powder thermal spraying process valve body Using electrostatic powder thermal spraying process, spraying thickness 250μm. Body heated at 200°C for 3 hours, powder cured at...
What is a JIS lug butterfly valve？ The driving method of the lug butterfly valve can be used by manual, worm-gear, pneumatic, and electric. The connection method can be used for flanges and clamps. Structural forms can be used for single eccentric, middle line, double eccentric, triple eccentric. Seal structure can choose soft seal, hard seal, and the pressure range PN0.1-10Mpa. The nominal diameter is DN40 ~ 2000mm. The material can choose cast steel and stainless steel. Due to the extensive range of valves, the same valve has different combinations in different occasions and working conditions . The disc of the wafer lug butterfly valve is installed in the diameter direction of the pipe. In the cylindrical channel of the butterfly valve body, the disc rotate around the axis, and the rotation angle is between 0°and 90°. When rotating to 90°, the valve is fully open. Advantages of the JIS lug butterfly valve： 1.Save place The length of the short structure can save raw materials and installation space. It can also effectively supports the strength of the pipe. 2.Good sealing performance The squeezing speed of the disc can ensure that the valve is effectively sealed. 3.Can meet the needs of...
1.5 times the working pressure with water. This test is performed after valve assembly and with disc in half position open, it is called as a body hydro test.
