If it is found during commissioning that the manufacturer of pneumatic butterfly valve is very slow in opening the valve at the initial position, but it will be very fast after the action. If it is found during commissioning that the valve is very slow in opening the valve at the initial position, but it will be very fast after the action, this situation is that the valve is closed too tightly, Just turn down the stroke of the cylinder a little (turn the stroke adjusting screws at both ends of the cylinder a little inward at the same time, and when adjusting, move the valve to the open position, and then turn off the air source and adjust it again), until the valve can be opened easily and closed in place without leakage.

Compensator is used for pipeline
To be simple and straightforward, compensator is to compensate the deformation of the pipeline due to thermal expansion and cold contraction. In fact, it is easy to think of the role of these types of products in our daily life! (Directly buried corrugated metal compensator) For heating pipeline in winter, in order to avoid pipeline deformation or damage due to elongation or stress of heating pipeline, it is required to set compensator on the pipeline to compensate the warm-up length of the pipeline, so as to compensate the axial, horizontal and angular thermal deformation of absorption pipeline with the stress of pipe wall and the force acting on the valve support structure.
2. Expansion and contraction amount of corrugated compensator is convenient for installation and disassembly of valve pipeline.
3. Absorb equipment vibration and reduce the impact of equipment vibration on pipeline.
4. Absorb the deformation of pipeline caused by earthquake and ground subsidence.
In the case of too long thermal pipelines, square compensators are required to reduce the stretch of 'thermal expansion and cold contraction' on pipelines. The output value of China's pipeline industry has increased significantly, with rich product categories, improved quality, and higher technological content. In the domestic market, domestic compensators account for an absolute dominant share, and the development of the domestic southern market and the international market has also achieved gratifying results. On the other hand, the compensator industry is also facing greater competitive pressure. This competitive pressure mainly comes from five aspects:
1. New threats.
2. The supplier's bargaining power.
3. Competition between existing companies.
4. The buyer's bargaining power.
5. Substitute threats. That is, the price reduction of the buyer and the request for increasing production quality and service from time to time, the rapid growth of substitutes such as non-metallic compensators instead of metal compensators, the increasingly fierce horizontal competition, the price increase of the supplier and the entry of new participants. Among them, the competitive pressure in the first three aspects has become more and more intense in recent two or three years. The growing competitive pressure has eroded the industry profits, which is not conducive to the healthy development of the industry and enterprises.