Dosing Pumps

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Generally, dosing pumps are referred to as oscillating displacement pumps with adjustable stroke length. Depending on the requirement the driving mechanism can be equipped with hydraulically actuated diaphragm.


Electrically driven pumps offer besides the stroke length adjustment a further possibility to adjust the delivery flow by modifying the motor rotation speed.

For a small delivery flow and a low delivery pressure, electromagnetically driven pumps are nowadays the devices of choice since they can simply be adapted to the process requirements by modifying the stroke frequency manually or through an external control (pulse or analog) signal.

Electromagnetic LMI pump. Flow rate: up to 76 l/h. Pressure: up to 20.7 bar (click to enlarge)

For several years microprocessor-controlled dosing pumps with stepping motor are part of our portfolio. This pump model has a lot of possibilities and options for adjusting the delivery flow and monitoring the delivery rate. The driving mechanism offers additionally a nearly unlimited delivery adjustment, allowing for an extremely large range of adjustment.

Motor-driven, hydraulically actuated diaphragm pump MAXROY. Flow rate: up to 1,110 l/h. Pressure: up to 28 bar (click to enlarge)

The pneumatically driven dosing pumps of Williams Co. are a specialty for niche applications. These pumps are employed by reason of their Ex safety and the simple controllability through pressurized-air pulses in the oil and gas industry. An interesting application for this pump model is also the dosing of additives in pipelines where normally no driving energy is available. The pumps can source the required energy from the gas pressure of the pipeline.

Hydraulically actuated diaphragm pump WilRoy for the oil and gas industry. Flow rate: up to 2.04/8.51 l/h. Pressure: up to 207 bar (click to enlarge)

From left to right (click to enlarge)


Motor-driven, hydraulically actuated diaphragm pump mROY. Flow rate: up to 310 l/h. Pressure: up to 123 bar.

Motor-driven MILROYAL pump in modular design. Flow rate: up to 345 l/h. Pressure: up to 500 bar.

Motor-driven PRIMEROYAL pump in modular design. Flow rate: up to 15,665 l/h. Pressure: up to 500 bar.

Dosing Pumps Milton Roy for industrial applications and extreme conditions

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