Besides metal pneumatic butterfly valves, what other pneumatic butterfly valves are there
There are many kinds of pneumatic butterfly valves. As far as I know, there are metal pneumatic butterfly valves, rubber pneumatic butterfly valves. What other pneumatic butterfly valves do you not know? Next, let's understand other types of pneumatic butterfly valves!
1. Wire rope pneumatic butterfly valve
The wire rope pneumatic butterfly valve is the most widely used pneumatic butterfly valve in China at present, which is often used as the vibration damping support of vibration equipment. The advantages are that the natural frequency can be controlled within 20Hz, the price is cheap, the performance is stable, high temperature resistance, low temperature resistance, oil resistance, corrosion resistance, aging resistance, and long service life. It can be used for elastic support with different requirements, can be preloaded, and can also be made into suspension type. The disadvantage is that the damping performance is poor and the isolation effect of high-frequency vibration is poor. In high frequency, the spring gradually becomes rigid, the elasticity becomes worse, and the vibration isolation effect becomes worse, which is called "high frequency failure". At present, the small spiral steel spring set is combined with cast iron shell, and some damping measures are taken, but the practical damping is not improved much. The effect of high-frequency failure can be weakened by inserting rubber pads when installing shock absorbers. However, some rubbers are easy to age under pressure, and sometimes they can be installed in the air, which is more ideal.
2. Rubber pneumatic butterfly valve
The rubber can be cured and cut to form various rubber pneumatic butterfly valves. The advantage is that it can isolate vibration not only in the axial direction, but also in the rotation direction, and the natural frequency can be controlled within 15Hz. The internal damping of rubber is much larger than that of metal, and the high-frequency vibration isolation effect is good. The device is convenient, easy to bond with metal firmly, small in size, light in weight and low in price. The defect is aging resistance. The operating temperature range of ordinary rubber is 0-70 ℃, and the lower limit temperature of special process can reach - 50 ℃. It is easy to age in the air, especially under direct sunlight. The ordinary service life is 5-10 years, and the load characteristics are often not different. It is forbidden to be subject to long-term heavy load, which will cause relaxation. The performance and quality of rubber vibration isolators mainly depend on the formula and vulcanization process of rubber. The vulcanization temperature and time are very important, and it is often necessary to repeat experiments to summarize the process.
Metal pneumatic butterfly valve
3. Rubber vibration isolation pad
Unlike the rubber pneumatic butterfly valve, the rubber vibration isolation pad is a rubber plate, which can be placed between the vibration equipment and the foundation in a large area. Some grooves are often cut out on the surface of the rubber vibration isolation pad to meet the deformation requirements under pressure. It is widely used because of its durable high elasticity, good vibration isolation, shock isolation and sound insulation performance. The applicable vibration isolation natural frequency of rubber vibration isolation pad is 10-15Hz, and multi-layer stacking can be lower than 10Hz,. The defects of rubber vibration isolation pads are similar to those of rubber vibration isolators. They are easily corroded by temperature, oil quality, sunlight and chemical reagents, resulting in performance degradation and aging. The common service life is 5-10 years, and they should be checked and replaced regularly.
4. Glass wool board and rock wool board
As an elastic cushion, glass wool can play a very good role in reducing vibration of machines or building foundations. When the load is 1-2T/m2, the preferred thickness is 10-15cm, the unit weight is 64kg/m3, and the natural frequency is about 10Hz. When the unit weight of rock wool board for vibration isolation is 120kg/m3, the load is 250kg/m2, and the thickness is 10cm, the natural frequency is about 16Hz. The advantages of glass wool board and rock wool board are fire resistance, corrosion resistance and temperature resistance. The defect is that it needs to be waterproof, deformed after being damped, and the vibration isolation effect drops.

What are the steps for welding pneumatic butterfly valves? Pneumatic butterfly valves are widely used nowadays. When pneumatic butterfly valves are used as highly flexible pipes to connect metal equipment, they are mostly connected with other equipment by welding. In the process of welding, we often use the five step welding method. Today, I will introduce the steps of welding pneumatic butterfly valves. 1. Nozzle size. During welding, the pipe length shall be measured first, and then the pipe knife shall be used to cut the pipe size. 2. Clean the pipeline. Due to the metal nature of the pipe, some waste slag will be generated due to oxidation in the pipe, and some waste slag will affect the welding effect. Therefore, before welding, we should use emery cloth or paper to grind away the waste slag in the pipe. 3. Clean the fittings with a pipe brush. Cleaning the fittings ensures that the welding hose is bonded to the tin plating. 4. Control the welding time. Generally speaking, the length of the weld bead you need depends on the length of the solder. 5. Use flare heat pipe. The torch heat pipe is mainly used to ensure the average heating at the welding point of the pipe. Note that when using the torch, ensure that the flame is close enough to cover the diameter of the whole pipe. The above introduction is the steps of welding pneumatic butterfly valve. If you have other questions, please call our hotline. We are waiting for your call!
Bellows are often used to make compensation devices in piping systems. Bellows are often used to manufacture not only the body of pneumatic butterfly valve, but also compensation devices in pipeline system. Applying the elastic displacement of bellows in the longitudinal, transverse and lateral directions can smoothly compensate the rated deviation in the position of the connection point due to temperature difference, vibration or device and other reasons. Of course, it is very difficult and impossible for ordinary metal lubricating pipes to do this. Affirming the elastic range of bellows displacement is mainly to study its longitudinal stiffness and bending stiffness, because they can directly reflect the size of the elastic deformation of bellows in the longitudinal and horizontal directions.
What are the methods to deal with the wear problem of the corrugated compensator? It is well known that wear and tear will inevitably occur during the operation of the compensator for a long time, especially when the rotary compensator is operating, which is the easiest way to show the wear and leakage of the filler. So how to deal with such situations accurately on the premise of reducing loss? Here is the summary experience of Shanghai Jizhuang Compensator for you. The application of maintenance free rotary compensator and ordinary rotary compensator products depends on the flexible packing in the packing chamber to stop sealing. During the application of rotary compensator, the packing will wear a little every time it rotates. When the wear reaches a certain value, the product will leak. Once the rotary compensator has air leakage, it is necessary to stop the gas supply of the heat supply network pipeline, remove the packing pressing flange, add a certain amount of packing, and then press the flange for reuse; For the maintenance free rotary compensator, a set of tension springs is added below the packing compression flange. When the packing shows slight wear, the tension of the compression tension spring is used to compensate, thus extending the time of product leakage (the leakage time is delayed by 3-5 years). When the wear amount exceeds the tension compensation amount of the tension spring, it is only necessary to tighten the nut above the compression flange of the tension spring, without the need for air stop correction. The ripple compensator has no limit on the number of times of work, and is not easy to leak, thus greatly advancing the social and economic benefits of the gas supply unit and the gas consumption unit. The rotary compensator compensates for 5000 times without leakage under the pressure of 4.0Mpa, and the sealing result is excellent. This is the information provided by Shanghai Songxia Shock Absorber Co., Ltd. Please correct and criticize the deficiencies. Shanghai Jizhuang Compensator Co., Ltd. is a modern enterprise integrating research, development, production and sales. We have professional technicians, sellers, product inspection teams and device teams.
Plastic coated pneumatic butterfly valve refers to the wire and cable maintenance pipe used for wires, cables and automatic instrument signals, with specifications ranging from 6mm to 150mm. Ultra small diameter stainless steel hose (inner diameter: 3mm~25mm) is mainly used for the maintenance of the sensing line of fine optical ruler and industrial sensor line. It has good flexibility, corrosion resistance, high temperature resistance, wear resistance and tensile resistance. First: waterproof and insulation. Plastic coated pneumatic butterfly valves are widely used in all walks of life, and most of the time they are used are under wet and exposed to air conditions, which requires waterproof and insulation performance. Otherwise, in the communication industry, in power plants, the infixing of several lines will lead to very serious results, which may be the partial paralysis of communication, It may be the breakdown of a power supply system. Second: High temperature resistance and fire prevention. The unique properties of plastic coated pneumatic butterfly valves are fire prevention and high temperature resistance. Many lines do not stop working in ordinary environments, especially in the southern summer. In fact, the summer is generally high in China. Stopping work under such temperature environment is also necessary to have the effect of high temperature resistance and fire prevention. This is also the most special property of this kind of hose.
Pneumatic butterfly valve can not be twisted without two steps. There have been many articles on the Internet about the care of shower heads, but most of them talk about how to care for shower heads and sprinklers. In fact, the shower faucet is tightly structured and consolidated, which is not easy to be damaged. It is often overlooked that the shower shower pneumatic butterfly valve connecting the water inlet pipe and the water outlet faucet is the most vulnerable and needs maintenance. Let's look back at the shower hose. In fact, its connection with the water inlet pipe is connected to the valve body and fixed by a screw cap hose. The problem is that the screw cap is easy to gradually loosen, rust or even fall apart over time. The bigger problem is that in the process of bathing, this hose is pulled most frequently, and the range is often very large, which will cause the central fracture between the pneumatic butterfly valve and the screw cap. What's more, the other end of the hose is connected to the shower head in the same way. If the owner operates improperly, such as exerting too much force, it is also easy to break. We have never seen the condition that the middle of the pneumatic butterfly valve breaks first and both ends are in good condition, is that right? Many users have not yet paid attention to this point, and lack of self-care knowledge in this regard. Here, you should have understood how to take care of the shower hose. Here are some points for your reference: first, you should make the pneumatic butterfly valve extend naturally when you take a shower. After use, you should insert the shower nozzle into the rack, and never coil the pneumatic butterfly valve around the shower faucet. Secondly, when pulling the hose, it is necessary to avoid a dead knot between the hose and the center of the valve body connector. It is necessary to have a look with your heart. When pulling the hose, it is necessary to use light force to prevent the pneumatic butterfly valve from being broken or causing damage to the hose.
What is the reason for handling the instability of pneumatic butterfly valve? Whether the pneumatic butterfly valve is a ductile air pressure seal, a directional telescopic pipe compensator, or a pneumatic butterfly valve, there are many problems. In other words, the strength of waste products to bear the pressure on gas usually lies in its reliability. Scientific research on the reliability of commodities can also use the Euler pressure bar relationship! Measure its approximate load. In that way, we can calculate the pressure load of the east and west similarly according to the length calculation method. However, such a result, due to the reasons of the lower two levels, is beyond the practical value. 1、 Due to the size of the ripple, the thickness of the pneumatic butterfly valve bone, and other processing problems, the axis of the pneumatic butterfly valve is often separated from the original symmetry axis. In other words, in essence, the axis of the product has a small half end bending. For this pneumatic butterfly valve, the unevenness of mesh sleeve weaving and the consistency of each pair of strength also range the carrying capacity of bellows. 2、 Since the bending stiffness value in the pressure load formula of the pneumatic butterfly valve is really determined to consider the water wave (valley) half circle of the product as the rigid connection point of the diaphragm, the pneumatic butterfly valve itself is higher than the bending stiffness value.