Check whether the pneumatic butterfly valve is in good condition for normal operation of the car
With the increasing use of pneumatic butterfly valves, many related products have been derived. In the previous article, we introduced you to the use of pneumatic butterfly valves in cars. Do you know? In fact, the pneumatic butterfly valve is a vulnerable part in the process of automobile operation. The working quality of the pneumatic butterfly valve will directly affect the stability of automobile driving and the life of other parts. Therefore, we should keep the pneumatic butterfly valve in good working condition. The following methods can be used to check whether the pneumatic butterfly valve works well.
1. Stop the car after driving 10km on the road with poor road conditions, touch the shell of the pneumatic butterfly valve with your hand. If it is not hot enough, explain that there is no resistance inside the pneumatic butterfly valve, and the pneumatic butterfly valve does not work. At this time, take part in the appropriate lubricating oil, and then stop the test. If the shell is hot, the pneumatic butterfly valve is short of oil, and it should be filled with oil; Otherwise, the pneumatic butterfly valve is invalid.
2. Press the bumper firmly, and then release it. If the car jumps 2-3 times, it indicates that the pneumatic butterfly valve works well.
3. If the vehicle vibrates violently in case of slow driving and emergency braking, it indicates that the pneumatic butterfly valve is faulty.
4. Dismantle the pneumatic butterfly valve to make it stand upright, clamp the lower connecting ring on the bench clamp, and pull and press the shock absorber rod several times. At this time, there should be stable resistance. The resistance of pulling upward should be greater than the resistance of pressing downward. If the resistance is unstable or no resistance, it may be the lack of oil inside the pneumatic butterfly valve or the damage of valve parts. Stop repairing or changing parts.
After confirming that the pneumatic butterfly valve has problems or failure, check whether the pneumatic butterfly valve can leak oil or has traces of obsolete oil leakage. The oil seal washer and seal washer are cracked and damaged, and the nuts of the oil storage cylinder cover are loose.
If oil leakage is found, first tighten the nuts of the oil cylinder head. If the pneumatic butterfly valve still leaks oil, it may be that the oil seal and sealing washer are damaged and invalid. Replace them with new seals. If the oil leakage still cannot be eliminated, the shock rod should be pulled out. If it feels stuck or different, further check whether the clearance between the piston and the cylinder barrel is too large, whether the piston connecting rod of the pneumatic butterfly valve is bent, and whether the piston connecting rod surface and cylinder barrel are scratched or pulled.
The application of pneumatic butterfly valves in automobiles is still of great importance. If you want to use automobiles normally, you should take care of yourself and check regularly to see if the pneumatic butterfly valves are normal! If you need to purchase pneumatic butterfly valve, please choose Wuxi Xizhen pneumatic butterfly valve!

Application status and selection criteria of PTFE compensator
1. The compensator is usually installed on the thermal pipes such as hot water, steam, smoke and air, and gas to absorb the deformation caused by heating.
2. The outlet of the pump is suitable for metal soft connection (also called pneumatic butterfly valve). Since it is difficult to set a fixed support for the pipeline in the pump room, the compensator is easily damaged by the pipeline stretching at the pump port.
3. When selecting the type of compensator, the manufacturer shall be provided with the pipe diameter of the pipe, the temperature, pressure, compensation amount and other corresponding coefficients of the PTFE compensator medium. The manufacturer shall calculate the optimal design data to ensure the optimal service life of the compensator. The corrugated compensator is composed of the bellows (an elastic element) that constitutes its main body, end pipes, supports, flanges, conduits and other accessories. It is also called a contraction joint or expansion joint in custom. Due to its special material and use, it should be matched reasonably when selecting models, and understand various models. The detailed precautions for the tetrafluoro compensator are as follows: 1. The corrugated compensator is a disturbing element centered on the corrugated pipe, which can be used for axial, transverse and angular compensation on the pipeline.
2. In order to reduce the self-excited phenomenon of the medium, the PTFE compensator is equipped with an inner sleeve inside the product, which limits the radial compensation ability to a large extent, so it is generally only used to absorb or compensate the axial displacement of the pipeline (if a small amount of radial displacement is really required in the pipeline system, it can also absorb the combination of axial, angular and arbitrary displacement;
3. Pay attention to the hinge compensator, which is used together with two or three compensators (a single hinge compensator has no compensation ability) to absorb the transverse deformation in a single plane;
4. Universal hinge type compensator, used by two or three matching devices, can absorb three-dimensional deformation. Technical characteristics and application status of non-metallic contraction joints