The ULP21-4040 Reverse Osmosis Membrane is an ultra-low-pressure membrane element designed for efficient dissolved solids reduction in commercial and industrial water treatment systems. Its standard 4-inch × 40-inch configuration supports installation in compatible 4040 membrane housings and multi-element reverse osmosis equipment.
Under specified test conditions, the current ULP21-4040 configuration provides a nominal permeate flow of 2,600 gallons per day (approximately 9.8 cubic meters per day) with a stable salt-rejection rate of 99.5%. Its ultra-low-pressure design helps produce high-quality permeate at lower feed pressure than many conventional low-pressure RO membrane elements.
The spiral-wound membrane element provides approximately 100 square feet of active membrane area. This combination of high membrane area, strong salt rejection and substantial permeate production makes it suitable for commercial and industrial systems requiring efficient water purification.
The ULP21-4040 is intended for appropriately pretreated, low-salinity feedwater, including qualifying municipal water, groundwater and surface water. Proper pretreatment is essential for controlling sediment, hardness, scale, iron, organic fouling, and oxidizing chemicals that could reduce membrane performance or service life.
