A Solenoid-Driven Dosing Pump is a type of positive displacement metering pump used to inject precise amounts of liquid chemicals into a process stream. It uses a solenoid actuator instead of a motor and gearbox, making it ideal for small to medium dosing applications.

solenoid driven dosing pump

SOLENOID DRIVEN DOSING PUMP

Origin: China

CleanTech Engineering Limited

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Component Description
Solenoid Coil Provides electromagnetic force to drive the diaphragm.
Pump Head Contains the diaphragm and valves for liquid movement.
Diaphragm Flexible membrane that moves fluid without leaks.
Check Valves Prevents backflow during suction and discharge.
Control Panel Adjusts stroke rate and monitors alarms.
Chemical Tank Holds the chemical to be dosed.

How It Works:

  • A solenoid (electromagnet) moves a diaphragm back and forth inside a pump head.

  • On the suction stroke, the diaphragm retracts, drawing liquid into the pump chamber through a check valve.

  • On the discharge stroke, the diaphragm pushes the liquid out through another check valve into the process line.

  • The dosing rate is controlled by adjusting the stroke frequency (speed) and sometimes stroke length.

Advantages:

  • High Accuracy (±1–2%)

  • Simple Design and maintenance

  • No rotating parts, reducing mechanical wear

  • Suitable for corrosive and hazardous chemicals

  • Pulse-based metering allows precise dosing

Limitations:

  • Typically low flow rate (up to ~50 l/h)

  • Limited pressure range (usually up to ~10 bar)

  • Not ideal for slurries or fluids with solids

Typical Applications:

  • Water treatment (chlorine, pH control)

  • Boiler and cooling tower chemical injection

  • Food and beverage (additives, flavorings)

  • Pharmaceuticals

  • Laboratory and pilot plant setups