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常见问题
?Does a double sphere rubber expansion joint always allow more movement?
It may provide greater or different movement capability, but actual movement depends on the selected size, pressure, construction and manufacturer data.
?Which design is better for pump connections?
A single sphere design is often evaluated first because it is compact. A double sphere may be considered when additional verified movement is required and sufficient installation space is available.
?Is a double sphere joint rated for higher pressure?
Not automatically. Pressure capability depends on the complete rubber body, reinforcement, size, temperature and product design.
?Is a double sphere joint better for pump suction?
Not by default. Pump suction selection must be based on minimum internal pressure and verified vacuum capability.
?Do single and double sphere joints require control rods?
Control rods are selected according to pressure thrust, anchors, equipment loads and pullout risk rather than sphere count alone.
?What information is needed to compare single and double sphere joints?
Provide size, installed length, medium, temperature, pressure, vacuum, movement, flange standard, supports, restraints, quantity and piping drawings.