Flow performance curve of diaphragm pump
Thread Content
Gentlemen, I have a question: Reciprocating pumps have a characteristic in that the flow rate is independent of the discharge pressure; no matter what the discharge pressure is, the flow rate remains unchanged. Then why, being another type of reciprocating pump, does the flow rate of a diaphragm pump vary inversely with the discharge pressure (see the performance curve for details)?
Diaphragm pumps operate by the opening and closing of two sets of check valves at the inlet and outlet. When the outlet pressure is high, the valve ball drops back to close the check valve quickly, resulting in less liquid being pumped out
Diaphragm pumps operate by the opening and closing of two sets of check valves at the inlet and outlet. When the outlet pressure is high, the valve ball drops back to close the check valve quickly, resulting in less liquid being pumped out