Problems with the setting of safety valves in mechanical diaphragm pumps
Thread Content
I would like to ask whether an internal safety valve is necessary for mechanical diaphragm pumps, and if so, how should the pressure value be determined?
The safety valve is installed on the outlet pipeline, with a set pressure of approximately 1.15 times the outlet pressure
A safety valve is installed to prevent damage to the pump, pipelines, or other equipment caused by blockages in the discharge lines; the set pressure is approximately 1.1 to 1.3 times the operating pressure.
Mechanical diaphragm pumps do not require an internal pressure safety valve
Reply 1# llype: Mechanical diaphragm pumps do not require an internal safety valve, whereas hydraulic diaphragm pumps must have one to prevent overpressure.
Mechanical diaphragm pumps do not have internal safety valves, as this is determined by their mechanical structure； Hydraulic diaphragm pump-type metering pumps are equipped with a built-in safety valve, also known as a four-function valve, which has functions such as pressure relief, pressure discharge, positioning, and oil replenishment.
Mechanical diaphragm pumps do not have built-in safety valves, while hydraulic diaphragm pumps do. However, to prevent the diaphragm from being damaged by overpressure, mechanical diaphragm pumps require an external safety valve.