Electronic Dosing Pump

Solenoid pumps are the simplest, because they have the fewest moving parts. Timing circuitry energizes an electromagnet, which slides the diaphragm into the discharge position. The magnet moves against both back pressure and a spring. When the magnet is de-energized, it drives the diaphragm mechanism backward into the suction position. Diaphragm pumps pulse a flexible diaphragm to displace liquid with each stroke. Diaphragm pumps deliver their fluid with a high degree of pulsation. There are several diaphragm pump categories, including solenoid, mechanical and hydraulic.