1.Rubber expansion joint introduction: 
1. This product can greatly reduce pipeline system shock and noise. 
And can fundamentally resolve pipe joints displacement, axial stretch 
and non-concentricity.
2. By using different materials, it can be made many kinds to cater for
different medium and environment. Such as acid resistance, alkali 
resistance, corrosion resistance, oil resistance and heat resistance etc.

3. The material is pure rubber, sealing is very good. It is in light weight, 
very easy for installation .This product has long life performance,but must 
be not contact with sharp metal instruments to avoid piercing the sphere. 

4. The product can be used for lift and transportation of raw water and sewage, transportation of water supply cooling cycle water thermal power ,condensate water of metallurgy industry and chemical industry.

 2.Classification

(1) according to appearance: concentric with diameter rubber expansion joint, concentric reducer rubber expansion joint, eccentric reducer rubber expansion joint.
(2) according to the structure: single ball flexible rubber joint, double sphere rubber joint, spheres rubber joint, elbow sphere rubber joint.
(3) According to the link the form: flange coupling, threaded joint.

3.Rubber expansion joint  material list: