Motor-driven vs solenoid dosing pump
Quick answer: Solenoid (electromagnetic) dosing pumps suit small flows (roughly up to a few tens of LPH) at modest pressure, such as small water-treatment plants. Motor-driven mechanical metering pumps suit larger flows, higher pressure, continuous process duty and multi-head configurations.
| Motor-driven metering pump | Solenoid dosing pump | |
|---|---|---|
| Drive | Electric motor and gearbox | Electromagnet pulses the diaphragm |
| Flow | From a few LPH to thousands of LPH | Small, typically below ~50 LPH |
| Pressure | Medium to very high (plunger types) | Low to medium |
| Duty | Continuous, heavy process duty | Light to medium duty |
| Multi-head | Yes: duplex, triplex on one drive | No |
| Control | Stroke length plus VFD or stroke actuator | Pulse frequency, often built-in controller |
| Best for | Refinery, chemical, fertilizer, large WTP/ETP, boilers | Small RO, swimming pools, small STP |
Questions
When should I choose a motor-driven metering pump over a solenoid pump?
Choose motor-driven when you need more than a few tens of LPH, higher pressure, continuous duty, or several dosing heads on one drive.
Can a motor-driven metering pump be controlled automatically?
Yes. Flow can be controlled with a VFD on the motor or an electric stroke-length actuator taking a 4–20 mA signal from your plant controller.
Need a motor-driven metering pump?
JEW makes plunger and diaphragm types in Mumbai.
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