Single-stage reverse osmosis equipment is also known as a reverse osmosis equipment, that is, the raw water through the pretreatment system, precision filters, through the high-pressure pump will be sent to the reverse osmosis device directly to the output of the product water is called single-stage reverse osmosis.
Double-stage reverse osmosis equipment, also known as two-stage reverse osmosis, the raw water is sent to the pretreatment system under pressure coarse filtration, and then into the precision filter filtration, through a high-pressure pump pressurized to the first level of reverse osmosis system, the output of this system of water from the second high-pressure pump pressurized to the second level of reverse osmosis system, the production of water, known as two-stage reverse osmosis.
Single-stage reverse osmosis equipment is mainly used in the water quality is good, or water quality requirements are not very high users; two-stage reverse osmosis equipment is mainly used in the water quality is relatively poor or water quality requirements of higher users.
Single-stage and two-stage reverse osmosis equipment desalination rate is somewhat different, two-stage reverse osmosis equipment desalination rate is higher than single-stage reverse osmosis equipment.