First, let us know the PUMP CLASSIFICATION:
Diaphragm pump or plunger pump belong to reciprocating pump of one kind of positive displacement pump.
(2) The plungers push three diaphragm by turns (no. 3).
(3) The diaphragms exert pressure to the liquid.
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(2) If diaphragm broken, the pump stopped working immediately, and will not damage pump by entering materials into transmission assembly.