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Working Principle and Installation of RO Pump

The working principle of the RO pump

The internal structure design of the RO pump head mainly includes the high-pressure chamber, the booster chamber, the valve cover, the inlet check valve, the outlet check valve, the diaphragm, and the cam water jet support assembly.

The reverse osmosis water pump is powered by a DC motor. After the power is turned on, the motor rotor rotates, driving the eccentric swinging wheel to perform eccentric motion, which is then converted into reciprocating motion of the three cam water jet support assemblies that are closely integrated with the eccentric swinging wheel. This drives the diaphragm to perform reciprocating motion, which produces a reciprocating suction and squeezing phenomenon on the valve cover.

When the cam water jet support assembly moves from top to bottom, a vacuum effect is produced in the booster chamber. Under the action of the vacuum suction force, the inlet check valve is opened and water is sucked into the booster chamber. When the motor rotates to a certain angle, the cam water jet support assembly gradually changes from moving from top to bottom to moving from bottom to top, and squeezes the water that has been sucked in upwards. Under the pressure of squeezing, the inlet check valve is sealed in the forward direction, and the water can only be discharged in the direction of the high-pressure chamber. When the pressure is greater than the anti-backlash force of the outlet check valve, the outlet check valve is opened and the water is discharged towards the high-pressure chamber. The continuous rotation of the motor enables the diaphragm to perform reciprocating motion, completing the purpose of water suction and pressure boosting.

The installation of the RO pump

The RO pump is generally installed on the RO water purification equipment, and its installation position should be behind the pre-filter and in front of the RO membrane. It should be installed at least behind the first pre-filter (PP cotton), and if it is in non-rural areas with no water pressure or low water pressure (below 1kg), it is recommended to install it behind all pre-filters and in front of the RO membrane. The outlet end of the RO pump is directly connected to the inlet end of the RO membrane.

This installation process allows the raw water to be filtered through the pre-filter to prevent sand and other particles and impurities from entering the RO pump and causing pressure loss and other problems.

Directly installing the RO pump in front of the RO membrane can reduce pressure loss and provide a more stable pressure and flow for the RO membrane. When installing the RO pump, it is generally recommended to choose between vertical or horizontal installation with the pump head facing downward. When installing, pay attention to the direction of the water flow should be consistent with the direction of the arrow on the pump head.

References and Products

Application and Common Problems of RO Booster Pump in the System (Water Purifier): RO motor pump

The Classifications and Working Principles of RO Booster Pump: Best RO booster pump

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