History and Installation Analysis of Reverse Osmosis Pumps

1.The Origin and Generations of RO Pumps

RO pumps are direct current diaphragm booster pumps. The original direct current diaphragm booster pump was invented by E. Dale Hartliey in 1979 in the United States. Its initial design was for water storage tank water delivery purposes in the automobile and boating industries, such as recreational vehicles and yachts, and it was later promoted for use in low-pressure water supply boosting fields.

In 1985, RO household water purifiers entered the Taiwanese market from the United States. Due to the generally high water pressure in the United States, RO water purifiers did not require external pressure pumps. Therefore, the initially imported RO water purifiers did not have RO booster pumps.

After the application of RO water purifiers in Taiwan, it was found that the tap water pressure in Taiwan could not meet the product water pressure requirements of RO water purifiers. As a result, direct current diaphragm booster pumps from the United States were introduced as booster pumps for RO water purifiers. Subsequently, direct current diaphragm booster pumps have been widely used in the water appliance industry for RO water purifier products, and hence the name "RO pump" was coined.

2.Installation of RO Pumps

Reverse osmosis water pump is generally installed on RO water purifier equipment, and their installation location should be behind the pre-filter and in front of the RO membrane. At least it should be installed after the first pre-filter (PP cotton). If it is a non-rural area with no water pressure or low water pressure (less than 1kg), it is recommended to install it behind all pre-filters and in front of the RO membrane.

The outlet of the RO pump is directly connected to the inlet of the RO membrane. This installation process allows the source water to first pass through the pre-filter to filter out sand and other particles and impurities in the water, preventing them 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 rate for the RO membrane.

When installing the RO pump, it is generally recommended to install the pump head vertically downwards or horizontally, with the pump head facing downwards whenever possible. When installing, attention should be paid to ensuring that the direction of water flow is consistent with the direction of the arrow on the pump head.