The HLE-4040 is a polyamide compound RO membrane built for window cleaners and solar panel cleaners who want to get more life out of their DI resin. By purifying incoming water up to 98% before it reaches the final DI stage, the membrane leaves the resin with fewer dissolved solids to remove, which can mean fewer resin changes and refills. The tradeoff is pressure; the higher rejection rate requires more pressure to keep water moving through the RO. For that reason, a pump is highly recommended when running this membrane. It is a good fit for RO/DI setups already running a pump, or for window and solar cleaners looking to get longer life out of their DI resin between refills.

Fits any 4"x40" RO housing.

Key Features:

• Up to 98% purification before water reaches the DI resin stage
• Reduces the dissolved-solids load placed on DI resin
• Designed for RO/DI window cleaning and solar cleaning systems
• Higher rejection rate requires increased operating pressure
• Polyamide compound membrane construction
• Maximum feedwater flow of 16 gpm
• Feedwater residual chlorine concentration must remain below 0.1 ppm
• Continuous operating pH range of 3–10

Specs:

• Model: HLE-4040
• Membrane Type: Polyamide Compound
• Purification: Up to 98%
• Testing Pressure: 100 psi (0.69 MPa / 6.9 bar)
• Testing Solution Temperature: 77°F (25°C)
• Testing Solution NaCl Concentration: 500 ppm
• Testing Solution pH: 7.5
• Maximum Feedwater Flow: 16 gpm (3.6 m³/hr)
• Maximum Feedwater Temperature: 113°F (45°C)
• Maximum Feedwater SDI: 5
• Maximum Residual Chlorine Concentration: <0.1 ppm