1、 Pneumatic ball valve is a common pneumatic valve. Advantages:
1. The pneumatic ball valve is composed of a pneumatic actuator (single acting, double acting, AW type and GT type) and a ball valve. Compressed air enters the cylinder to drive the piston to rotate, and then drives the opening and closing of the ball valve through the connecting shaft, so as to cut off and adjust the medium. The pneumatic actuator is relatively fast and does not need workers to do it by themselves, which saves human resources and time to a large extent.
2. The pneumatic ball valve is evolved from the stop valve. It has the same 90 degree rotation lifting action, but the difference is that the cock body is a sphere with a circular through hole or channel passing through its axis. The proportion of the sphere and the passage opening should be such that when the sphere rotates 90 degrees, the inlet and outlet should be all spherical, so as to cut off the flow. This type of valve can be installed at any position in the pipeline. It can be adjusted (with locator) and used for opening and closing (optional accessories). There are also many types of ball valves, which are classified according to different connection methods and materials. The details will be introduced in the article.

The good comprehensive performance of non-metallic compensator makes it widely used in many engineering fields. The performance of round non-metallic compensator is usually used for ventilation, dust removal, smoke exhaust and air conditioning insulation pipes and equipment with low working pressure
The final quality and service cycle of corrugated contraction joint non-metallic compensator (fiber fabric compensator) mainly depend on the selection of various main materials during design or manufacturing. The non-metallic compensator (fiber fabric compensator) is mainly composed of ring belt, support, deflector, insulation layer, batten, positioning rod, etc. The support, deflector, batten and positioning rod are metal materials. The deflector is mainly selected according to the temperature and medium of flue gas in the pipeline. The batten is made of ordinary carbon steel for rust prevention and high temperature prevention. The positioning rod is a stud bolt, which is used to avoid belt retraction during manufacturing, transportation and installation. At the same time, ensure the height of the compensator. After the non-metallic compensator (fiber fabric compensator) is complete, make sure to loosen the nuts at both ends.
With the rapid development of power, cement, steel, and other major industries in China, non-metallic compensators (fiber fabric compensators), also known as flexible joints or non-metallic contraction joints, have been found everywhere. Because non-metallic compensators (fiber fabric compensators) have many advantages, such as convenient devices, low design requirements, no reverse thrust, simple and fast manufacturing, etc., design units, manufacturers, The application units are happy to use it.