Diaphragm pumps, also known as control pumps, are a primary type of actuator. They receive control signals from a regulating control unit and, through power operation, change the fluid flow rate. The role of a diaphragm pump in the control process is to receive control signals from a regulator or computer, change the flow rate of the controlled medium, and maintain the controlled parameter within the required range, thereby achieving automation of the production process.
If we compare an automatic control system to a manual control process, the detection unit is like the human eye, the regulating control unit is like the human brain, and the actuator-the diaphragm pump-is like the human hands and feet. Diaphragm pumps are indispensable for regulating and controlling specific parameters in a process, such as temperature, pressure, flow rate, and liquid level.
Pneumatic diaphragm pumps commonly use five materials: plastic, aluminum alloy, cast iron, stainless steel, and Teflon. Electric diaphragm pumps use four of these materials: plastic, aluminum alloy, cast iron, and stainless steel. The diaphragm of the diaphragm pump is made of various materials such as nitrile rubber, neoprene rubber, fluororubber, polytetrafluoroethylene (PTFE), and polytetrafluoroethylene (PTFE) depending on the liquid medium, and is installed in various special applications to pump various media to meet different needs.
