Hydranautics CPA (composite polyamide) membrane elements have become the trusted industry standard for high performance, high purity applications. CPA elements are available in both 4-inch and 8-inch diameters by 40-inch long spiral wound configurations as well as smaller diameter and shorter length elements for all high purity applications. CPA membranes provide some of the highest salt rejection rates available - every element on every order for every customer.

Hydranautics also offers Integrated Membrane Solutions (IMS) combining a range of RO, NF, UF and MF membrane technologies to achieve the most comprehensive, effective, low-cost solutions for the industry.

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Unit of Measure
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CPA-4040E
2250 Gallon Per Day (gal/d) Permeate Flow Composite Polyamide (CPA) High Performance Membrane Element for High Purity Water
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CPA2-4040
2250 Gallon Per Day (gal/d) Permeate Flow Composite Polyamide (CPA) High Performance Membrane Element for High Purity Water
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CPA2
10000 Gallon Per Day (gal/d) Permeate Flow Composite Polyamide (CPA) High Performance Membrane Element for High Purity Water
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CPA3
11000 Gallon Per Day (gal/d) Permeate Flow Composite Polyamide (CPA) High Performance Membrane Element for High Purity Water
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CPA5-LD-4040
2100 Gallon Per Day (gal/d) Permeate Flow Composite Polyamide (CPA) High Performance Membrane Element for High Purity Water
Description N/A Hydranautics CPA (composite polyamide) membrane elements have become the trusted industry standard for high performance, high purity applications. CPA elements are available in both 4-inch and 8-inch diameters by 40-inch long spiral wound configurations as well as smaller diameter and shorter length elements for all high purity applications. CPA membranes provide some of the highest salt rejection rates available - every element on every order for every customer.

Hydranautics also offers Integrated Membrane Solutions (IMS) combining a range of RO, NF, UF and MF membrane technologies to achieve the most comprehensive, effective, low-cost solutions for the industry.
N/A CPA2 is used in the treatment of brackish waters to produce low TDS permeate. This membrane is available in 4-inch and 8-inch diameters. N/A CPA2 is used in the treatment of brackish waters to produce low TDS permeate. This membrane is available in 4-inch and 8-inch diameters. N/A CPA3 is exhibits higher tolerance to feed water suspended solids. N/A CPA5 is offers improved rejection of all ions including silica and nitrates. This membrane is available in 4-inch and 8-inch diameters.
Brands N/A Culligan® Hydranautics Nitto
Membrane Product N/A CPA N/A CPA2 N/A CPA2 N/A CPA3 N/A CPA5
Diameter N/A N/A 4 in8 in N/A 4 in8 in N/A N/A 4 in8 in
Length N/A 40 in
Permeate Flow N/A 2250 gal/d8.5 m³/d N/A 2250 gal/d8.5 m³/d N/A 10000 gal/d37.9 m³/d N/A 11000 gal/d41.6 m³/d N/A 2100 gal/d7.95 m³/d
Normal Salt Rejection N/A 99.5 % N/A 99.5 % N/A 99.7 % N/A 99.7 % N/A 99.7 %
Minimum Salt Rejection N/A 99.2 % N/A 99.2 % N/A 99.5 % N/A 99.6 % N/A 99.5 %
Membrane Active Area N/A 65 ft²6.04 m² N/A 85 ft²7.9 m² N/A 365 ft²33.9 m² N/A 400 ft²37.1 m² N/A 80 ft²7.4 m²
Culligan® Part Number N/A D1032546 N/A D1032547 N/A D1032549 N/A D1032550 N/A D1032548
Standard Business Lead Time N/A 10 days
Applications N/A
  • Desalting of well waters for municipal drinking water supplies
  • Reducing TDS (total dissolved solids) prior to ion-exchange
  • Production of boiler make-up water for power plants
  • Ultrapure water for semiconductor industry
  • Ultrapure water for pharmaceuticals
  • Ultrapure water for food and beverage
Additional Information N/A The CPA5, CPA6 and CPA7 membranes are available in the LD variant wherein low differential LD Technology® is used to minimize colloidal fouling when used with conventional pre-treatment equipment. These membranes offer consistently low feed pressures and longer intervals between cleanings.

Additionally, the CPA5 and CPA6 membranes are available in the MAX variant which have a 440 ft² (40.9 m²) active membrane surface area. The increased membrane area can reduce capital costs by requiring fewer pressure vessels and less floor space.
N/A N/A N/A N/A The CPA5 membrane is available in the LD variant wherein low differential LD Technology® is used to minimize colloidal fouling when used with conventional pre-treatment equipment. These membranes offer consistently low feed pressures and longer intervals between cleanings.

Additionally, the CPA5 and CPA6 membranes are available in the MAX variant which have a 440 ft² (40.9 m²) active membrane surface area. The increased membrane area can reduce capital costs by requiring fewer pressure vessels and less floor space.