Hydranautics ESPA-4641 Membrane

Product Description

Industrial users worldwide have made ESPA their first choice for high productivity and salt rejection is the ESPA-4641, one of the best in energy-saving polyamide membranes. The growing family of ESPA RO membranes continue to meet the ever-increasing demands of the water treatment industry. There's an ESPA solution to satisfy even the most challenging water treatment needs with exceptional performance, productivity and savings.

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ESPA-4641 Specifications

Permeate Flow: 3600 gpd (13.6 m³/d)
Salt Rejection: 99.4% (97.5% minimum)
Configuration: Spiral Wound
Membrane Polymer: Composite Polyamide
Membrane Active Area: 120ft²

Elements are wet tested for quality assurance using the following conditions (Data taken after 30 minutes of operation):

1500 PPM NaCl solution
150 psi (1.03 MPa) Applied Pressure
77°F (25°C) Operating Temperature
15% Permeate Recovery
6.5 – 7.0 pH Range

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Standard Operating Limits:

Maximum Applied Pressure: 300 psig (2.1 MPa)
Maximum Chlorine Concentration: < 0.1 PPM
Maximum Operating Temperature: 113° F (45°C)
pH Range; Continuous (Cleaning): 3.0 –10.0*
Maximum Feedwater Turbidity: 1.0 NTU
Maximum Feedwater SDI (15 mins): 4.0
Maximum Feed Flow: 18 GPM (3.0 m³/h)
Minimum Ratio of Concentrate to Permeate Flow for any element: 5:1
Maximum Pressure Drop for Each Element: 10 psi

The limitations shown here are for general use. For specific projects, operating at more conservative values may ensure the best performance and longest life of the membrane. See Hydranautics Technical Bulletins for more detail on operation limits, cleaning pH, and cleaning temperatures.

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