Reasons why a double-diaphragm coupling loses its flexibility after installation
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Generally, after installation, a double-diaphragm coupling can move back and forth from side to side, which allows for compensation of any misalignment. The pump has been re-centered, but once the coupling bolts are tightened, there is no more flexibility from side to side. What causes this?
Reason analysis: 1. For double-diaphragm couplings with larger specifications, it is difficult to sense their elasticity by hand after installation; this is not the case for those with smaller specifications. 2. It is also possible that after the bolts of the coupling are tightened, there is interference with the large hole; this is a quality issue with the coupling. The specific reason can only be determined after communicating and understanding the situation; what you said is too general. It would be best to have photos