SKU: 83110949583

4" x 40" | 2000 GPD | 150 psi | 99.6% Rej. | Hydranautics ESPA Low Pressure Membrane (Replaces ESPA2-4040)

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Description

4" x 40" | 2000 GPD | 150 psi | 99.6% Rej. | Hydranautics ESPA Low Pressure Membrane (Replaces ESPA2-4040)Hydranautics ESPA Series RO Membrane Elements ESPA2 LD 4040 Ultra Low Energy 4" x 40" Reverse Osmosis Membrane Element Hydranautics ESPA2 LD 4040 membrane provides optimum salt rejection and permeate flows and features Hydranautics Low Differential LD Technlogy to minimize colloidal fouling when used with conventional pre treatment equipment. Hydranautics ESPA2 LD 4040 membranes offer consistently low feed pressures and longer intervals between


Hydranautics ESPA Series RO Membrane Elements

ESPA2-LD-4040 Ultra-Low Energy 4" x 40" Reverse Osmosis Membrane Element


Hydranautics ESPA2-LD-4040 membrane provides optimum salt rejection and permeate flows and features Hydranautics Low Differential LD Technlogy to minimize colloidal fouling when used with conventional pre-treatment equipment. Hydranautics ESPA2-LD-4040 membranes offer consistently low feed pressures and longer intervals between cleanings.

ESPA2-LD-4040 membranes are commonly chosen when lower permeate TDS and lower feed pressures are needed. Offering the highest energy efficiency at lowest costs, ESPA2 elements are used in large municipal wastewater reclamation plants.

ESPA2-LD-4040 is the replacement for Hydranautics ESPA2-4040 membrane element, which has been discontinued by the manufacturer.


ESPA2-LD-4040 Specifications

Manufacturer Model: ESPA2-LD-4040
Brand: Hydranautics Nitto
Replaces Model: Hydranautics ESPA2-4040
Permeate Flow: 2,000 gpd (7.57m3/day)
Salt Rejection: 99.6% (99.4% Minimum)
Test Feed Pressure: 150 psi (1.03 MPa)
Test Temperature: 77°F (25°C)
Test Recovery: 15%
Test pH Range: 6.5 to 7.0 pH
Test Feed: 1500 ppm NaCl Solution
Configuration: Low Fouling Spiral Wound
Membrane Polymer: Composite Polyamide
Membrane Active Area: 80 ft2 (7.4 m2)
Feed Spacer: 34 mil (0.864 mm)


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SKU: 83110949583

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Mike
Battle Creek, US
★★★★★ 3
Narrow for an 11.5W
Size: 11.5 Wide, Color: Navy
Nice look and material but very narrow for a wide, had to return
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Reviewed in the United States on February 25, 2026
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David Kuck
Houston, US
★★★★★ 5
NIce Shoes
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Very nice quality and comfort
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Reviewed in the United States on June 1, 2026
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elizabeth a.
Omaha, US
★★★★★ 5
Great shoe.
Size: 11.5, Color: Navy
Perfect fit. Stylish comfortable.
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Reviewed in the United States on May 2, 2026
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phala riffel
Dallas, US
★★★★★ 5
Comfortable shoes
Size: 10.5, Color: Black
Fit well Look great Get compliments all the time
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Reviewed in the United States on April 3, 2026
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Larry
Bozeman, US
★★★★★ 5
Good value for the money.
Size: 9.5 Wide, Color: Beige
Comfortable right out of the box. Great style and well made. The more you wear the softer they get but maintain their overall appearance.
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Reviewed in the United States on May 25, 2026

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