The Frotec ULP-4040 is a 4" x 40" ultra low pressure reverse osmosis membrane element for commercial and light industrial RO systems, including car wash spot-free rinse, restaurant, lab and small municipal systems. Ultra low pressure design runs at up to 40% lower operating pressure than standard brackish water elements, lowering pump energy costs.
Specifications
- Model: ULP-4040
- Size: 4" diameter (3.9" / 99 mm) x 40" long (1,016 mm)
- Permeate tube: 0.75" (19 mm) ID, 1.05" (26.7 mm) OD
- Active membrane area: 78 sq ft (7.2 m²)
- Permeate flow: 2,250 GPD (8.7 m³/day)
- Stabilized salt rejection: 99.3% (minimum 99.0%)
- Test conditions: 150 psi (1.03 MPa), 77 °F (25 °C), 2,000 ppm NaCl, pH 7, 15% recovery
Operating limits
- Maximum operating pressure: 600 psi (41 bar)
- Maximum operating temperature: 113 °F (45 °C)
- Maximum pressure drop per element: 15 psi (1.0 bar)
- pH range: 2–11 continuous, 1–13 cleaning
- Maximum feed SDI (15 min): 5.0
- Free chlorine tolerance: less than 0.1 ppm (use carbon pre-filtration)
Fits standard 4" x 40" pressure vessels in new or existing RO systems. Permeate flow may vary ±15% and active area ±4% per element. Stabilized rejection is normally reached after 24–48 hours of operation.
Country of origin: China. Ships from North Carolina.
