The ULP21-2521 Reverse Osmosis Membrane is a high-efficiency, ultra-low-pressure RO element designed for compact commercial and light-industrial water treatment applications. Manufactured using advanced thin film composite (TFC) membrane technology, this membrane delivers excellent rejection of dissolved salts, total dissolved solids (TDS), and common water contaminants while operating at reduced feed pressure.
Designed in the 2.5" x 21" (2521) configuration, the ULP21-2521 is ideal for smaller RO systems where space constraints and energy efficiency are critical. Its ultra-low pressure design allows systems to achieve stable permeate flow and consistent water quality while minimizing pump demand and overall operating costs.
The ULP21-2521 is commonly used in compact commercial RO units, equipment feed water systems, spot-free rinse applications, and light industrial processes requiring reliable water purification. High salt rejection ensures consistent permeate quality, while durable membrane construction supports long service life when paired with proper pretreatment and routine maintenance.
For system designers and operators seeking dependable performance in a compact footprint, the ULP21-2521 offers an efficient and cost-effective reverse osmosis solution.
ULP21-2521 Reverse Osmosis Membrane – Ultra-Low Pressure RO Element
Model
ULP21-2521
Membrane Type
Reverse Osmosis (RO)
Technology
Thin Film Composite (TFC)
Element Size
2.5" x 21" (2521)
Nominal Flow Rate
~1,000 GPD (typical)
Salt Rejection
≥ 99% (typical)
Operating Pressure
Ultra-Low Pressure
Max Operating Temperature
113°F (45°C)
Max Feed TDS
2,000 ppm
Operating pH Range
2 – 11
Cleaning pH Range
1 – 12
Chlorine Tolerance
< 0.1 ppm
Applications
Commercial RO, Compact RO Systems
