CPA® Hydranautics Membranes

High Rejection Brackish Water Reverse Osmosis Elements

High Performance for the highest quality water.

CPA (Composite Polyamide) elements set the standard for RO membrane elements - over 600 million gallons per day of pure water are produced by CPA elements for global municipalities and industries. CPA membranes provide the highest salt rejection rates available.

CPA2 Series - The workhorse and industry standard, CPA2 delivers consistently high performance, day in and day out.

CPA3 Series - The element with the best combination of productivity and salt rejection available.

CPA5 Series - has minimized biofouling, minimized colloidal fouling and enhanced cleanability.

Advantages

99.7% Nominal Rejection
High TOC, silica and hardness rejection

Applications

Desalting of well waters - municipal drinking water
Reducing TDS prior to ion exchange
Boiler make-up water
Ultrapure water for semi-conductor manufacture

Hydranautics CPA Membranes
Hydranautics Membrane CPA

Model No. (Click for spec. sheet)	Flow Rate*		Pressure Rating (PSI)	Nominal *Salt Rejection %**	*Minimum Salt Rejection %**	Size* (Dia. x L)	Spec.
Model No. (Click for spec. sheet)	(GPD)	(m3/d)	Pressure Rating (PSI)	Nominal *Salt Rejection %**	*Minimum Salt Rejection %**	Size* (Dia. x L)	Spec.
CPA2-4040	2,250	8.5	225	99.5	99.2	4" × 40"
CPA5-LD-4040	2,100	7.95	225	99.7	99.5	4" × 40"
CPA2	10,000	37.9	225	99.7	99.5	8" × 40"
CPA3	11,000	41.6	225	99.7	99.6	8" × 40"
CPA5-LD	11,000	41.6	225	99.7	99.6	8" × 40"
CPA5MAX	12,000	45.4	225	99.7	99.6	8" x 40"

*Please see product specification sheets for the test conditions under which the stated performance are based, and exact membrane element dimensions.
Click the model number to download the data sheet for that element.

Hydranautics Membranes CPA

Obsolete CPA Membrane Models

The below Hydranautics CPA Membrane Models are Obsolete and are no longer available for purchase. The below information is being listed for reference and replacement purposes only.

Model No.	Flow Rate (GPD)	Minimum Salt Rejection %	Size (Inches)	Specifications
CPA-400 *Not Available - Use CPA3 or CPA5-LD*	11,000	99.0%	8" × 40"
CPA4 *Not Available - Use CPA3 or CPA5-LD*	6,000	99.6%	8" × 40"

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