elastomeric material Rubber Expansion Joints flexible connectors

1. Introduction:

Rubber expansion joints generally consist of smooth waveform compensation elements with rubber flanges at both ends and metal flanges. The metal flanges commonly adopt a loose tube construction. The surface of the waveform compensation element is rubber, and the inner layer consists of several layers of reinforced fiber or steel strip (wire) reinforced interlayer. The reinforced fiber or steel strip (wire) reinforced interlayer extends to the rubber flanges at both ends, and there is a hard steel wire skeleton inside the flanges. Rubber expansion joints have significant displacement compensation capabilities and can compensate for axial, lateral, and angular displacements. They also have the ability to reduce noise, decrease vibration, and provide certain corrosion resistance. With features such as high pressure resistance, good elasticity, large displacement, effective vibration absorption and noise reduction, and easy installation, they can be widely used in pipeline systems for water supply and drainage, HVAC, fire protection, compressors, papermaking, pharmaceuticals, ships, pumps, fans, etc.

2. Selection Instructions

Flexible rubber joints selection instructions:

Rubber joints are generally suitable for temperatures from -200°C to 70°C. The instantaneous temperature can reach 115°C, and the operating temperature is from 70°C to 115°C.For flange-connected rubber joints with high working pressure and temperature (diameter above 200, temperature above 70°C, working pressure above 1.5MPa), flange rubber joints with limited devices can be selected.

When installing flange-connected rubber joints, the bolts connecting the flanges should be threaded from the inside of the flanges to both ends of the flanges, intersecting with washers or spring washers. The bolts should be tightened diagonally step by step.

For rubber joints connected by the union swivel, the union swivel at both ends should not be swapped during installation to avoid product leakage or damage.

3. Advantages:

Rubber expansion joints have ultra-high performance, reliability, and service life, thereby improving factory safety and mechanical integrity of equipment. By inserting specially designed products into rigid pipeline systems, rubber expansion joints can: reduce displacement/improve thermal stability/release thermal changes, load stress, pump pressure fluctuations, system strain caused by sediment wear/ reduce mechanical noise/ compensate for centrifugation/ eliminate electrolysis between different metals.