How to choose high quality rubber expansion joints

There are many types of rubber expansion joints and many working environments for application. Different rubber joints are selected according to different requirements and environments. So the service life of rubber joints not only depends on the quality, but also on the correct use and maintenance. If they cannot be used and maintained correctly, they will also seriously affect their quality and service life, and may even cause serious accidents, thus causing property damage. Rubber joints usually use rubber, nylon and PTFE as the seat sealing materials, so the use temperature is subject to the seat sealing materials. The cut-off action is accomplished by pressing the plastic rubber joints (floating rubber joints) against each other by the metal spheres under the action of the medium. Rubber joint seal under a specific contact pressure, some areas will undergo elastic-plastic deformation. This deformation compensates for the manufacturing accuracy and surface roughness of the spheres and ensures the sealing performance of the rubber joint. Rubber joint seals are usually made of plastic, so when choosing the structure and performance of rubber joints, the fire resistance and fire prevention of rubber joints, especially in the petroleum, chemical, metallurgical and other sectors using flammable and explosive media in the equipment and piping systems of rubber joints, more attention should be paid to fire resistance and fire prevention.

The most critical factor that determines the quality of rubber joints is the rubber material, and good rubber material can make good rubber joints. Some rubber joints have poor damping performance, some will crack and age more seriously after using for a period of time. These are caused by poor quality rubber.You can start by looking at the color of the rubber in sunlight or light. A particularly bright one is not necessarily a good rubber ball. A good rubber ball is certainly bright black, which is a natural rubber color.

How much pressure can the sphere withstand? Due to the flow rate of the material, the inner diameter of the rubber, etc., it is subject to a certain pressure, and this pressure is divided into positive and negative pressure. According to their needs to choose the rated pressure to be greater than the actual use of the working pressure, in order to avoid damage to the sphere.

Also according to their own work when the circulation medium to choose different rubber materials, there are natural rubber, butyl rubber, butyl rubber, nitrile rubber, EPDM rubber, neoprene, silicone rubber, fluorine rubber and so on. They are heat-resistant, acid-resistant, alkali-resistant, corrosion-resistant, wear-resistant, oil-resistant and other functions. Choosing the right rubber material can reduce the corrosion degree of the rubber to prolong the service life of the rubber joint.

The length of rubber, too long rubber is bound to be bent in use, which will increase the pressure at the bend of the pipe body when transporting the medium, and will also cause certain damage.