Hydranautics ESPA4-LD 4040


ESPA4 are the lowest feed pressure reverse osmosis membranes offering low energy consumption. ESPA4 membranes require ultra-low pressures without compromising high salt rejection and are commonly used in the second pass of a reverse osmosis system.

The ESPA4 reverse osmosis membranes are available in the LD variant. Low differential LD Technology® models are offered to minimize colloidal fouling when used with conventional pre-treatment equipment. These reverse osmosis membranes offer consistently low feed pressures and longer intervals between cleanings. ESPA4 reverse osmosis membranes are available in the MAX variant with 440 ft2 (40.9 m2) active membrane surface area. Increased membrane area reduces capital costs by requiring fewer pressure vessels and less floor space

Availability In stock (>5 pcs)
€289,19 incl. VAT
Product code 13
Brand Hydranautics
Category Brackis Water
Warranty 1 year
General Product Description*  
Size: 4″ diameter & 40″ length
Permeate Flow: 2,350 gpd (8.90 m 3 /d)
Salt Rejection: 99.2% (99.0% minimum)
Configuration: Spiral Wound
Membrane Polymer: Composite Polyamide
Product Use and Restrictions  
Maximum Applied Pressure: 600 psig (4.14 MPa)
Maximum Chlorine Concentration: < 0.1 PPM
Maximum Operating Temperature: 113 °F (45 °C)
pH Range, Continuous (Cleaning): 2-10 (1-12)*
Maximum Feedwater Turbidity: 1.0 NTU
Maximum Feedwater SDI (15 mins): 5.0
Maximum Feed Flow: 16 GPM (3.6 m3 /h)
Maximum Pressure Drop for Each Element: 15 psi (0.10 MPa)
*Please refer to standard testing conditions and details in the enclosed datasheet
Weight 4.5 kg

Solutions You Need, Technologies You Trust!
Hydranautics is one of the global leaders in membrane technology. We apply state-of-the-art technology to manufacture industry’s most advanced, high-performance membrane products.