Common butterfly valve fault elimination methods

Common butterfly valve fault elimination methods Cause of failure: leakage of the sealing surface, and sundries are included in the butterfly plate and sealing ring of the butterfly valve. Elimination method: eliminate impurities and clean the inner cavity of the valve. Cause of failure: The butterfly plate and seal closing position of the butterfly valve are not in the right place. Elimination method: Adjust the limit screws of the actuator such as worm gear or electric actuator to achieve the correct closing position of the valve. Cause of failure: The outlet is equipped with flange bolts that are stressed or not compressed. Elimination method: check the flange plane and bolt pressing force, which should be evenly compressed. Cause of failure: The direction of the pressure test is not as required. Elimination method: Install in the direction of the arrow. Cause of failure: Failure of sealing gaskets on both sides. Elimination method: Replace the sealing gasket. Cause of failure: uneven or uncompressed pipe flange compression. Elimination method: compress the flange bolt or re-tighten the bolt with uniform force.

Precautions for valve maintenance

1. Before valve maintenance, the water supply or gas supply of the pipeline must be cut off, and the water or gas accumulated in the pipeline must be emptied to ensure safety. 2. In the process of maintenance, special attention should be paid to understanding the different maintenance methods of various valves, so as to adopt the correct maintenance methods. 3. In the maintenance work, it is necessary to strictly abide by the safety operation procedures, use professional tools and equipment, and take protective measures. 4. During the maintenance of the valve, it is necessary to pay attention to ensure the environmental hygiene of the place where the valve is located to avoid pollution to the environment. The valve is a key component in the pipeline system, and the maintenance of the valve can effectively extend the service life of the valve and ensure the normal operation of the pipeline system. Correct valve maintenance methods and safe operation procedures are important guarantees for valve maintenance, and if there is any problem, you need to seek professional help in time.

What are the reasons that affect the service life of butterfly valves

Butterfly valves are a common type of valve in industrial production piping systems. However, the service life of a butterfly valve is often affected by a variety of factors. The following butterfly valve manufacturers summarize the possible reasons that affect the service life of butterfly valves: 1. Improper installation and maintenance of equipment: Butterfly valve manufacturers believe that improper installation or maintenance of butterfly valves often leads to the destruction of valve seats. For example, if the internal structure of the valve body and piping are not cleaned prior to installation, residues in the piping may cause damage to the seat of the butterfly valve. Therefore, it is recommended that the operator perform regular maintenance and maintenance on the butterfly valve to ensure that the valve is in normal condition and avoid damage to the sealing ring of the valve seat. 2. The quality of the equipment: when the butterfly valve manufacturer does not pay attention to the details when talking about the processing quality of the seat of the butterfly valve, it will lead to cracking, porosity and other problems on the seat sealing ring. In addition, the operator selects the wrong butterfly valve model, which can cause the valve to mismatch the load standard, resulting in damage to the seat seal. Therefore, choosing the right butterfly valve model is important to extend the life of the equipment. 3. Pay attention to the flushing of the protruding face: Although the butterfly valve is stable, the flushing of the media may affect the life cycle of the valve seat. Due to the washout of the medium, the seat seal may be located inside the pipeline. Continuous flushing will cause corrosion of the seat seals and damage to the protruding surfaces of the seats. In addition, the butterfly plate rubs against the seat every time it opens and closes, which can adversely affect the protruding surface over time. In summary, maintaining the long-term stable operation of the equipment will be a key factor in maintaining the service life of the butterfly valve. Operators should follow proper installation and maintenance procedures and select the correct type of butterfly valve to ensure that all parts of the equipment are functioning properly and that the service life of the equipment is maximized.

What maintenance is required for the valve

Valve is an important equipment in the pipeline system, and its safety and reliability play a very important role in the normal operation of the entire pipeline system. Therefore, regular maintenance of the valve is essential. 1. Clean the valve After a period of use, the inner wall of the valve is prone to accumulate dirt and sediment, which will not only affect the service life of the valve, but also affect its normal operation. Therefore, it is necessary to clean the valve regularly to ensure the smooth and effective operation of the valve, and also to prolong the service life of the valve. 2. Lubricate the valve The sealing surface of the valve will have a lot of friction during operation, so the valve needs to be lubricated regularly to reduce friction and ensure its normal operation. Pay attention to the selection and use of lubricants, different types of valves need to use different lubricants. 3. Check the valve Regularly check the sealing performance, use status and operation of the valve, find and solve problems in time to avoid affecting the normal use of the valve.

Let's talk about these 3 connection methods of pneumatic ceramic double gate valves

Let's take a look at several connection methods of ceramic double gate valves, the connection methods between ceramic double gate valves are various, and different connection methods are also used in different occasions, with practical connection methods to reflect the value of ceramic double gate valves, different connections in the connection methods also have different skills, let's talk about how to connect the pneumatic ceramic double gate valves? 1. Threaded connection: The ball valve with threaded connection is mainly a ball valve with a nominal passage of less than 50mm. If the bore size is too large, it is difficult to install and seal the connection. Threaded connections are usually machined into tapered or straight pipe threads at the inlet and outlet ends of ball valves, which allow them to be connected to tapered threaded fittings or pipes. Because of the potential for large leaking channels in such connections, these channels can be plugged with sealants, sealing tape, or packing. If the material of the valve body can be welded, but the coefficient of expansion varies greatly, or the operating temperature varies widely, the threaded connection must be honeysealed. To facilitate the installation and removal of threaded ball valves, fittings are available at the appropriate location in the piping system. Ball valves with a nominal diameter of less than 50 mm can use a pipe sleeve as a pipe joint, and the thread of the pipe sleeve joint connects the two parts of the connection together. 2. Flange connection: The ball valve with flange connection is more convenient to install and disassemble, but the flange connection is heavier than the ball valve with threaded connection, and the corresponding price is also high, so it is suitable for pipe connection with various diameters and pressures. When the temperature exceeds 350 degrees, the bolts, gaskets and flanges become relaxed, and the load of the bolts is significantly reduced, and the flange connection with great force may leak. 3. Welded connection: Welded ball valves with nominal diameter below 50mm usually have welded sockets to undertake the pipes at the end of the load plane. Because socket welding forms a gap between the socket and the pipeline, it is possible that the gap is corroded by some media, and the vibration of the pipeline will fatigue the connection part, so the use of socket welding is limited to a certain extent. Welded connections are suitable for a wide range of pressures and temperatures, and are more reliable than flange connections when used in more loaded conditions. However, it is difficult to remove and reinstall the ball valve with welded connections, so its use is limited to situations where it can usually operate reliably for a long time, or when the conditions of use are high and the temperature is high.

Analysis of factors for the length of valve life

First, the type of valve affects the service life Different kinds of valves have different service life. For example, ball valves and gate valves have a long service life, which can reach more than 10 years, while butterfly valves and check valves have a relatively short service life, generally about 5 years. Therefore, in the selection of different types of valves, according to the characteristics and conditions of use, the appropriate valve should be selected to prolong the service life of the valve. Second, the material of the valve affects the service life The material of the valve is also an important factor affecting the service life of the valve. Different materials of valves have different corrosion resistance and wear resistance, and the service life will also change. For example, the service life of cast steel valves is related to the carbon content and hardness of the steel, while the service life of stainless steel valves is usually longer than that of cast steel valves. Therefore, when selecting the valve material, the appropriate material type and grade should be selected according to the specific working conditions and use requirements. 3. The working medium of the valve affects the service life The service life of the valve will be affected differently in different media environments. For example, the temperature, pressure, corrosiveness of the working medium, etc., will affect the material, tightness, strength and other properties of the valve, thereby shortening the service life of the valve. Therefore, when selecting valves, the characteristics and special requirements of the medium used should be considered, and the valves with suitable materials and structures should be selected. Fourth, the use of the valve environmental impact on the service life The environment in which the valve is used is also a factor that affects the life of the valve. For example, the valve is used in some corrosive occasions, which is prone to rust and other damage, and when used in special atmospheres, such as in chemical plants, the material and performance of the valve will be higher. Therefore, when using the valve, it is necessary to pay attention to the use environment and take appropriate maintenance measures to prolong the service life of the valve. To sum up, the service life of the valve is related to many factors, such as the type of valve, the material of the valve, the working medium of the valve, the environment in which the valve is used, etc. In the actual use process, maintenance, inspection and replacement should be carried out according to the specific situation to ensure the normal operation and safe use of the valve.

Advantages of pneumatic disc valves in powder conveying

(1) Superior sealing performance: The pneumatic disc valve adopts a metal hard sealing structure, which can effectively prevent powder leakage and ensure the safety and environmental protection of the conveying process. (2) Fast switching speed: The pneumatic actuator has the characteristics of fast response speed and rapid action, which can realize the rapid opening and closing of the valve and improve the work efficiency of the powder conveying system. (3) Good wear resistance: The disc plate of the pneumatic disc valve is made of wear-resistant materials, which has good wear resistance and can adapt to the high-speed flow and particle impact in the process of powder conveying. (4) Easy maintenance: The pneumatic butterfly valve has a simple structure and is easy to disassemble and repair, which reduces maintenance costs and downtime.

The three-piece slurry valve is available with manual, electric and hydraulic options

The three-piece slurry valve overcomes the shortcomings of the conventional flat gate valve that only transports a single medium (oil or water), and has good sealing performance when it is fully open and closed, and is a new type of valve with high technology, high quality, low liquid resistance, simple structure and reliable operation. It is widely used in the slurry transportation of granular materials in mines, power plants, metallurgy, chemical and other departments, especially in medium and high pressure slurry pipelines, and is an ideal replacement valve for slurry pipelines. By the ram plate and the left and right sealing plates are composed of three pieces of valve dynamic sealing pair, all the wearing parts are concentrated in the left and right sealing plates, when the parts need to be replaced, just disassemble the left and right valve plates, it can be easily replaced, solve the problem of perforation of the gate plate of the granular mud valve, and the inconvenience of disassembly and assembly after the damage of the parts. It is divided into monolithic, two-stage and three-stage type. The valve body casting adopts the advanced technology introduced from Taiwan, with reasonable structure and beautiful shape. The valve seat adopts an elastic sealing structure, which is reliable in sealing and easy to open and close. The stem adopts a bottom-mounted structure with an inverted seal, and the valve stem will not be impacted when the valve cavity is abnormally pressurized. The three-piece dynamic seal pair is composed of the ram plate and the left and right sealing plates, which reduces the volume of the valve cavity to almost zero. Therefore, it completely solves the problems of granular slurry valve and other old-fashioned slurry valves, which are not in place to open and close, perforated, and inconvenient to disassemble and assemble due to slurry deposition. At the same time, it also reduces the abrasion of the overflow parts, and has good opening and closing sealing, all the wearing parts are concentrated on these three plates, when the parts need to be replaced, as long as the upper valve plate is disassembled, it can be replaced at any time, which solves the problem of perforation of the granular mud valve gate plate and the inconvenience of disassembly and assembly after the parts are damaged. Depending on the pressure, manual, electric and hydraulic options are available.

Application scenarios of pneumatic disc valves in powder conveying

(1) Chemical industry: pneumatic disc valves are widely used in the conveying system of chemical raw materials, catalysts, pigments and other powders to ensure the safety and stability of the production process. (2) Building materials industry: pneumatic disc valve plays an important role in the conveying process of cement, gypsum, lime and other powders, improving production efficiency and product quality. (3) Food industry: pneumatic disc valves are widely used in the conveying system of flour, powdered sugar, starch and other powders, ensuring the hygienic safety and production efficiency of food. (4) Metallurgical industry: pneumatic disc valve plays a key role in the transportation process of ore, ore, steel slag and other powders, improving production efficiency and resource utilization.

The difference between an electric two-speed butterfly valve and a hydraulically controlled check butterfly valve

1. Definition of electric two-speed butterfly valve and hydraulic check butterfly valve The electric two-speed butterfly valve is an electric valve used for fluid control, which plays the role of shut-off and regulating the flow of media in the pipeline. Hydraulically controlled check butterfly valve is a kind of fluid control pipe fitting, which is mainly used to protect the pipeline from the valve of medium backflow. Second, the characteristics of electric two-speed butterfly valve and hydraulic check butterfly valve 1. Electric two-speed butterfly valve: It has the characteristics of two-speed adjustment and high torque output, compact structure, small size, strong fire safety, easy installation, and is suitable for conveying medium with a wide range of flow changes, such as air, water, oil, gas, steam, etc. 2. Hydraulically controlled check butterfly valve: with the characteristics of check, throttling and self-cleaning, it can well prevent the regurgitation of medium and pipeline blockage, simple structure, small size, long service life, suitable for liquid, gas and other medium pipelines, can be widely used in petrochemical, metallurgy, electric power, light industry and other industries pipeline system. 3. Application fields of electric two-speed butterfly valve and hydraulic check butterfly valve 1. Electric two-speed butterfly valve: It can be widely used in the pipeline system of insulation materials, metallurgy, chemical industry, electric power, food, medicine and other industries. 2. Hydraulically controlled check butterfly valve: suitable for hydraulic system and pneumatic system in various occasions, widely used in petroleum, chemical, metallurgy, electric power, light industry and other industries of pipeline system. Fourth, the advantages and disadvantages of electric two-speed butterfly valve and hydraulic check butterfly valve 1. The advantages of electric two-speed butterfly valve are compact structure, small size, strong fire safety, and the disadvantage is that the price is higher and the applicable medium range is limited. 2. The advantages of the hydraulic check butterfly valve are the characteristics of check return, throttling and self-cleaning, simple structure and long service life, and the disadvantage is that the flow range is small.