There are three types of coupling are commonly used for pump: jaw type elastic coupling, flexible pin coupling and diaphragm coupling.
Jaw type elastic coupling is also called the plum coupling, and its structure is shown below. Features: small size, light weight, simple structure, easy installation.Used for small power and less important occasions.The larger allowable torque is generally lower than 850N·m, and the general larger bore diameter is not more than 50mm.
Flexible pin bush coupling is used with a flexible bush (rubber material) at one end of the stud, installed in the coupling flange holes to achieve the two semi-coupling connection. Its characteristics are simple structure, easy installation, easy replacement, small size, light weight and high transmission torque.
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