The reverse osmosis pump is the core component of a reverse osmosis system, primarily responsible for providing sufficient working pressure to the reverse osmosis membrane to overcome the osmotic pressure of the raw water, thereby achieving water purification and separation.   1. Working Principle The pump operates by the reciprocating motion of a piston or plunger within the pump cylinder, causing a periodic change in the volume of the working chamber, thereby completing the suction and discharge of the liquid. When the piston or plunger moves to the right, the volume of the pump cylinder's working chamber increases, creating a partial vacuum. The inlet check valve opens due to the pressure difference between the external atmospheric pressure and the pump chamber pressure, and the raw water is drawn into the pump chamber through the inlet pipeline. When the piston or plunger moves to the left, the volume of the working chamber decreases, and the pressure inside the chamber increases. The inlet check valve closes due to the pressure of the liquid inside the chamber, and the outlet check valve is pushed open, forcing the high-pressure raw water into the reverse osmosis membrane module, providing the driving force for reverse osmosis separation.   2. Advantages The pump offers stable pressure output and precise pressure regulation, providing continuous and uniform working pressure for reverse osmosis membranes, ensuring efficient and stable membrane separation.  Its compact structure and small footprint make installation and maintenance convenient, adapting to the needs of different reverse osmosis systems.  Furthermore, the reciprocating design provides strong self-priming capabilities, allowing for stable liquid intake even with low raw water supply pressure, ensuring continuous system operation.  In addition, this type of pump has good adaptability to various media, can handle raw water containing certain impurities, has a long service life, and relatively low operating costs.   3. Applications • Seawater desalination • Industrial wastewater treatment   Reverse osmosis pumps are one of the key pieces of equipment in water purification and resource recovery. Elephant Machinery is committed to becoming an expert in reciprocating pump solutions across all fields, and our reverse osmosis pumps play a vital role in various application areas thanks to their superior performance.