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Hydranautics Reverse Osmosis Membranes – ESPA Range

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The growing family of ESPA (Energy-Saving Polyamide) RO membranes continue to meet the ever-increasing demands of the water treatment industry. Industrial users worldwide have made ESPA their first choice for high productivity and salt rejection.

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ESPA 1812 – Mini

Permeate Flow75gpd (0.28 m3/d)
Salt Rejection99.0 % (99.0% minimum)
ConfigurationSpiral Wound
Membrane PolymerComposite Polyamide
Membrane Active Area
Maximum Applied Pressure300 psig (2.1 MPa)
Maximum Chlorine Concentration<0.1 PPM
Maximum Operating Temperature113ºF (45ºC)
pH Range, Continuous (Cleaning)3.0 - 10*
Maximum Feedwater Turbidity1.0 NTU
Maximum Feedwater SDI (15 mins)4.0
Maximum Feed Flow3 GPM (11 l/m)
Minimum Ratio of concentrate to Permeate flow for any element5:1
Maximum pressure drop for each element10psi

ESPA 2514 – Mini

Permeate Flow250gpd (0.9 m3/d)
Salt Rejection99.4 % (98.0% minimum)
ConfigurationSpiral Wound
Membrane PolymerComposite Polyamide
Membrane Active Area5.1ft2
Maximum Applied Pressure300 psig (2.1 MPa)
Maximum Chlorine Concentration<0.1 PPM
Maximum Operating Temperature113ºF (45ºC)
pH Range, Continuous (Cleaning)3.0 - 10*
Maximum Feedwater Turbidity1.0 NTU
Maximum Feedwater SDI (15 mins)4.0
Maximum Feed Flow6 GPM (23 l/m)
Minimum Ratio of concentrate to Permeate flow for any element5:1
Maximum pressure drop for each element10psi

ESPA 2521 – Mini

Permeate Flow350gpd (1.3 m3/d)
Salt Rejection99.4 % (98.0% minimum)
ConfigurationSpiral Wound
Membrane PolymerComposite Polyamide
Membrane Active Area9.9ft2
Maximum Applied Pressure300 psig (2.1 MPa)
Maximum Chlorine Concentration<0.1 PPM
Maximum Operating Temperature113ºF (45ºC)
pH Range, Continuous (Cleaning)3.0 - 10*
Maximum Feedwater Turbidity1.0 NTU
Maximum Feedwater SDI (15 mins)4.0
Maximum Feed Flow6 GPM (23 l/m)
Minimum Ratio of concentrate to Permeate flow for any element5:1
Maximum pressure drop for each element10psi

ESPA 2540 – Mini

Permeate Flow750gpd (1.3 m3/d)
Salt Rejection99.4 % (98.0% minimum)
ConfigurationSpiral Wound
Membrane PolymerComposite Polyamide
Membrane Active Area25.5ft2
Maximum Applied Pressure300 psig (2.1 MPa)
Maximum Chlorine Concentration<0.1 PPM
Maximum Operating Temperature113ºF (45ºC)
pH Range, Continuous (Cleaning)3.0 - 10*
Maximum Feedwater Turbidity1.0 NTU
Maximum Feedwater SDI (15 mins)4.0
Maximum Feed Flow6 GPM (23 l/m)
Minimum Ratio of concentrate to Permeate flow for any element5:1
Maximum pressure drop for each element10psi

ESPA 4014 – 4″

Permeate Flow500gpd (1.3 m3/d)
Salt Rejection99.4 % (98.0% minimum)
ConfigurationSpiral Wound
Membrane PolymerComposite Polyamide
Membrane Active Area16.9ft2
Maximum Applied Pressure300 psig (2.1 MPa)
Maximum Chlorine Concentration<0.1 PPM
Maximum Operating Temperature113ºF (45ºC)
pH Range, Continuous (Cleaning)3.0 - 10*
Maximum Feedwater Turbidity1.0 NTU
Maximum Feedwater SDI (15 mins)4.0
Maximum Feed Flow12 GPM (45.4 l/m)
Minimum Ratio of concentrate to Permeate flow for any element5:1
Maximum pressure drop for each element10psi

ESPA 4021 – 4″

Permeate Flow1.000gpd (3.8 m3/d)
Salt Rejection99.4 % (98.0% minimum)
ConfigurationSpiral Wound
Membrane PolymerComposite Polyamide
Membrane Active Area28.6ft2
Maximum Applied Pressure300 psig (2.1 MPa)
Maximum Chlorine Concentration<0.1 PPM
Maximum Operating Temperature113ºF (45ºC)
pH Range, Continuous (Cleaning)3.0 - 10*
Maximum Feedwater Turbidity1.0 NTU
Maximum Feedwater SDI (15 mins)4.0
Maximum Feed Flow12 GPM (45.4 l/m)
Minimum Ratio of concentrate to Permeate flow for any element5:1
Maximum pressure drop for each element10psi

ESPA 4611 – 4″

Permeate Flow930gpd (3.5 m3/d)
Salt Rejection99.4 % (98.0% minimum)
ConfigurationSpiral Wound
Membrane PolymerComposite Polyamide
Membrane Active Area31ft2
Maximum Applied Pressure300 psig (2.1 MPa)
Maximum Chlorine Concentration<0.1 PPM
Maximum Operating Temperature113ºF (45ºC)
pH Range, Continuous (Cleaning)3.0 - 10*
Maximum Feedwater Turbidity1.0 NTU
Maximum Feedwater SDI (15 mins)4.0
Maximum Feed Flow18 GPM (3.0 m3/h)
Minimum Ratio of concentrate to Permeate flow for any element5:1
Maximum pressure drop for each element10psi

ESPA 4641 – 4″

Permeate Flow3600gpd (13.6 m3/d)
Salt Rejection99.4 % (97.5% minimum)
ConfigurationSpiral Wound
Membrane PolymerComposite Polyamide
Membrane Active Area120ft2
Maximum Applied Pressure300 psig (2.1 MPa)
Maximum Chlorine Concentration<0.1 PPM
Maximum Operating Temperature113ºF (45ºC)
pH Range, Continuous (Cleaning)3.0 - 10*
Maximum Feedwater Turbidity1.0 NTU
Maximum Feedwater SDI (15 mins)4.0
Maximum Feed Flow18 GPM (3.0 m3/h)
Minimum Ratio of concentrate to Permeate flow for any element5:1
Maximum pressure drop for each element10psi

ESPA1 4040 – 4″

Permeate Flow2600gpd (9.8 m3/d)
Salt Rejection99.3 % (99.0% minimum)
ConfigurationSpiral Wound
Membrane PolymerComposite Polyamide
Membrane Active Area85ft2
Maximum Applied Pressure600 psig (4.16 MPa)
Maximum Chlorine Concentration<0.1 PPM
Maximum Operating Temperature113ºF (45ºC)
pH Range, Continuous (Cleaning)2 - 10* (1-12)*
Maximum Feedwater Turbidity1.0 NTU
Maximum Feedwater SDI (15 mins)5.0
Maximum Feed Flow16 GPM (3.6 m3/h)
Minimum Ratio of concentrate to Permeate flow for any element5:1
Maximum pressure drop for each element10psi

ESPA2 LD 4040 (low fouling technology) – 4″

Permeate Flow2000 gpd (7.57 m3/d)
Salt Rejection99.6 % (99.4% minimum)
ConfigurationLow Fouling Spiral Wound
Membrane PolymerComposite Polyamide
Membrane Active Area80ft2 (7.43 m2)
Maximum Applied Pressure600 psig (4.16 MPa)
Maximum Chlorine Concentration<0.1 PPM
Maximum Operating Temperature113ºF (45ºC)
pH Range, Continuous (Cleaning)2 - 11 (1-13)*
Maximum Feedwater Turbidity1.0 NTU
Maximum Feedwater SDI (15 mins)5.0
Maximum Feed Flow16 GPM (3.6 m3/h)
Minimum Ratio of concentrate to Permeate flow for any element5:1
Maximum pressure drop for each element10psi

ESPA1 – 8″

Permeate Flow12,000 gpd (45.4 m3/d)
Salt Rejection99.3 % (99.0% minimum)
ConfigurationSpiral Wound
Membrane PolymerComposite Polyamide
Membrane Active Area400ft2 (37.1 m2)
Maximum Applied Pressure600 psig (4.16 MPa)
Maximum Chlorine Concentration<0.1 PPM
Maximum Operating Temperature113ºF (45ºC)
pH Range, Continuous (Cleaning)2 - 10 (1-12)*
Maximum Feedwater Turbidity1.0 NTU
Maximum Feedwater SDI (15 mins)5.0
Maximum Feed Flow75 GPM (17.0 m3/h)
Minimum Ratio of concentrate to Permeate flow for any element5:1
Maximum pressure drop for each element10psi

ESPA2 MAX – 8″

Permeate Flow12,000 gpd (45.4 m3/d)
Salt Rejection99.6 % (99.5% minimum)
ConfigurationSpiral Wound
Membrane PolymerComposite Polyamide
Membrane Active Area440ft2 (40.8 m2)
Maximum Applied Pressure600 psig (4.16 MPa)
Maximum Chlorine Concentration<0.1 PPM
Maximum Operating Temperature113ºF (45ºC)
pH Range, Continuous (Cleaning)2 - 10.6 (1-12)*
Maximum Feedwater Turbidity1.0 NTU
Maximum Feedwater SDI (15 mins)5.0
Maximum Feed Flow75 GPM (17.0 m3/h)
Minimum Ratio of concentrate to Permeate flow for any element5:1
Maximum pressure drop for each element10psi

ESPA2 LD – 8″

Permeate Flow10,000 gpd (37.9 m3/d)
Salt Rejection99.6 % (99.5% minimum)
ConfigurationLow Fouling Spiral Wound
Membrane PolymerComposite Polyamide
Membrane Active Area400ft2 (37.1 m2)
Maximum Applied Pressure600 psig (4.16 MPa)
Maximum Chlorine Concentration<0.1 PPM
Maximum Operating Temperature113ºF (45ºC)
pH Range, Continuous (Cleaning)2 - 11 (1-13)*
Maximum Feedwater Turbidity1.0 NTU
Maximum Feedwater SDI (15 mins)5.0
Maximum Feed Flow75 GPM (17.0 m3/h)
Minimum Ratio of concentrate to Permeate flow for any element5:1
Maximum pressure drop for each element10psi

ESPA4 LD – 8″

Permeate Flow12,000 gpd (45.4 m3/d)
Salt Rejection99.2 % (99.0% minimum)
ConfigurationLow Fouling Spiral Wound
Membrane PolymerComposite Polyamide
Membrane Active Area400ft2 (37.1 m2)
Maximum Applied Pressure600 psig (4.16 MPa)
Maximum Chlorine Concentration<0.1 PPM
Maximum Operating Temperature113ºF (45ºC)
pH Range, Continuous (Cleaning)2 - 10 (1-12)*
Maximum Feedwater Turbidity1.0 NTU
Maximum Feedwater SDI (15 mins)5.0
Maximum Feed Flow75 GPM (17.0 m3/h)
Minimum Ratio of concentrate to Permeate flow for any element5:1
Maximum pressure drop for each element10psi

ESPAB MAX – 8″

Permeate Flow9,000 gpd (34.1 m3/d)
Salt Rejection99.3 % (99.0% minimum)
ConfigurationSpiral Wound
Membrane PolymerComposite Polyamide
Membrane Active Area440ft2 (40.8 m2)
Maximum Applied Pressure600 psig (4.16 MPa)
Maximum Chlorine Concentration<0.1 PPM
Maximum Operating Temperature113ºF (45ºC)
pH Range, Continuous (Cleaning)2 - 11 (1-12.5)*
Maximum Feedwater Turbidity1.0 NTU
Maximum Feedwater SDI (15 mins)5.0
Maximum Feed Flow75 GPM (17.0 m3/h)
Minimum Ratio of concentrate to Permeate flow for any element5:1
Maximum pressure drop for each element10psi

ESPA4 MAX – 8″

Permeate Flow13,200 gpd (50 m3/d)
Salt Rejection99.2 % (99.0% minimum)
ConfigurationSpiral Wound
Membrane PolymerComposite Polyamide
Membrane Active Area440ft2 (40.8 m2)
Maximum Applied Pressure600 psig (4.16 MPa)
Maximum Chlorine Concentration<0.1 PPM
Maximum Operating Temperature113ºF (45ºC)
pH Range, Continuous (Cleaning)2 - 10 (1-12)*
Maximum Feedwater Turbidity1.0 NTU
Maximum Feedwater SDI (15 mins)5.0
Maximum Feed Flow75 GPM (17.0 m3/h)
Minimum Ratio of concentrate to Permeate flow for any element5:1
Maximum pressure drop for each element10psi

ESPA2 1640 – 16″

Permeate Flow41,000 gpd (155.2 m3/d)
Salt Rejection99.6 % (99.4% minimum)
ConfigurationSpiral Wound
Membrane PolymerComposite Polyamide
Membrane Active Area1700ft2 (158 m2)
Maximum Applied Pressure600 psig (4.1 MPa)
Maximum Chlorine Concentration<0.1 PPM
Maximum Operating Temperature113ºF (45ºC)
pH Range, Continuous (Cleaning)2 - 10.6 (1-12)*
Maximum Feedwater Turbidity1.0 NTU
Maximum Feedwater SDI (15 mins)5.0
Maximum Feed Flow250 GPM (56 m3/h)
Minimum Ratio of concentrate to Permeate flow for any element5:1
Maximum pressure drop for each element10psi

ESPAB 1640 – 16″

Permeate Flow34,000 gpd (128.7 m3/d)
Salt Rejection99.3 % (99.1% minimum)
ConfigurationSpiral Wound
Membrane PolymerComposite Polyamide
Membrane Active Area1700ft2 (158 m2)
Maximum Applied Pressure600 psig (4.1 MPa)
Maximum Chlorine Concentration<0.1 PPM
Maximum Operating Temperature113ºF (45ºC)
pH Range, Continuous (Cleaning)2 - 10.6 (1-12)*
Maximum Feedwater Turbidity1.0 NTU
Maximum Feedwater SDI (15 mins)5.0
Maximum Feed Flow250 GPM (56 m3/h)
Minimum Ratio of concentrate to Permeate flow for any element5:1
Maximum pressure drop for each element10psi