Rubber joints are mainly used for the connection between pipeline and valve, which is a kind of flexible device to transport various media. When choosing the material of the sphere and flange of rubber joints, it is necessary to choose the suitable material according to the transported medium, considering the physical properties (temperature, pressure) and chemical properties (corrosiveness) of the working medium, and also the cleanliness of the medium (with or without solid particles), besides, it is necessary to With reference to the relevant provisions of the state and the use sector, the correct and reasonable choice of rubber joint material can obtain economic service life and performance.

The correct choice of rubber joints is based on the designer's full mastery of the entire production process and operating conditions as a prerequisite. When choosing the type of rubber soft connection, the designer should first master the structural characteristics and performance of each rubber sphere, flange pressure material and other various issues.