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Grundfos BMET booster module consist of a BME and a BMT pump connected in series.
Both pumps has a Grundfos multi-stage submersible pump built into a stainless steel sleeve.
The BME pump is powered via a v-belt pulley by means of an electric standard motor. The pulley ball bearing features an oil lubricating and oil cooling system.
The BMT pump is powered via a Pelton turbine and connected in series with the first pump.
The BMET booster module are designed for use in reverse osmosis systems where the energy from the resulting high-pressure concentrate is recovered by the Pelton turbine.
This gives energy savings of up to 34 % compared to conventional systems.
The shaft seal, in the BME pump, is made of carbon/silicon carbide, specially designed for high pressures.
Both pumps has a water lubricated axial thrust bearing build in, to absorb the axial thrust from the pump.
The rubber bearings in both pumps are water-lubricated, and ball bearings in the motor are grease-lubricated.