1. Expansion joints are also called expansion joints, expansion joints and pneumatic valves. They are divided into several types, such as corrugated pneumatic valves, sleeve pneumatic valves, rotary pneumatic valves, square natural pneumatic valves, and jacketed expansion joints. Corrugated pneumatic valves are commonly used, mainly to ensure the safe operation of pipelines, and have the following functions:
1. Compensate the axial, transverse and angular thermal deformation of absorption pipe.
2. Absorb equipment vibration and reduce the impact of equipment vibration on pipeline. 3. Absorb the deformation of pipeline caused by earthquake and ground subsidence.
2. Pneumatic ball valve is a hollow valve product used for flexible connection between metal pipes. Pneumatic ball valve is also called valve pipe pneumatic ball valve, pneumatic ball valve, valve pneumatic ball valve, flexible joint, high-pressure pneumatic ball valve, valve shock absorber, etc. According to the connection mode, it can be divided into loose flange type, fixed flange type and threaded type; According to the structure, it can be divided into single sphere, double sphere, curved sphere, etc. The tubular valve part is composed of inner and outer rubber, cord fabric and steel ring, which is formed by vulcanization and then loosely combined with metal flange or parallel joint. This product can reduce vibration and noise, and can compensate for thermal expansion and cold contraction caused by temperature changes. It is widely used in various pipeline systems. Pneumatic ball valve is a pipe joint with high elasticity, high air tightness, medium resistance and weather resistance. This product makes use of the advantages of the valve, such as elasticity, high air tightness, medium resistance, weather resistance and radiation resistance. It is made of polyester cord fabric with high strength and strong cold and hot stability, which is diagonally compounded with it, and then vulcanized by high-pressure and high-temperature molds.
As the pneumatic ball valve has good comprehensive performance, it mainly plays the role of shock absorption, noise elimination and noise reduction. Therefore, it is widely used in chemical engineering, construction, water supply, drainage, petroleum, light and heavy industry, refrigeration, sanitation, plumbing, fire protection, power and other basic projects.