Rubber Sphere Structure of Rubber Bellows Expansion Joint

2017-09-22 14:44:00
Nina
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The rubber sphere of single rubber bellows expansion joint is composed of inner rubber layer, outer rubber layer and frame layer. And each layer plays different function, only combined the three layers together can give excellent performance to single rubber sphere expansion joint.

rubber bellows expansion joint

all kinds of rubber sphere expansion joint

Inner rubber layer of single rubber sphere expansion joint

The commonly used inner layer rubber material of single rubber sphere expansion joint are neoprene rubber, butyl rubber and natural rubber. Neoprene rubber is resistance to abrasion, oil and aging; butyl rubber has better gas tightness, resistant to ozone and inorganic strong acid; natural rubber is the most widely used rubber material, it resistant to alkali, high elasticity and high gas tightness. Since inner rubber layer of single rubber bellows expansion joint always been extended to flange end face, it requires the inner rubber layer must be able to resistant to water flow and leakage.

Outer rubber layer of single rubber sphere expansion joint

The commonly used outer layer rubber material of single rubber bellows expansion joint are neoprene rubber and butyl rubber. Neoprene rubber has excellent physical mechanical performance, resistant to all kinds of chemical agents, and has higher tensile strength, elongation. Because single rubber bellows expansion joint’s outer rubber sphere layer is exposed in the air, it will be easily damaged by external objects, which requires performance of heat resistance, acid and alkali resistance, oil resistance and ozone resistance.

Frame layer of single rubber sphere expansion joint

The frame layer is between inner rubber layer and outer layer, providing high strength to the single rubber sphere expansion joint, always produced by natural rubber with cord fabric, also steel wire rope. The frame layer give rubber bellows expansion joint strong capacity of thermal expansion, pressure resistance, vacuum resistance and water hammer impact resistance.


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