CPA-400-7+ Composite Polyamide Membranes

When high performance counts, CPA (Composite Polyamide) membranes from Hydranautics set the standard for RO membrane elements.

CPA membranes ensure reduced maintenance while significantly reducing downstream ion exchange costs. Over a half-billion gallons per day of pure water are produced by CPA2 for the world's industries, and for municipal supplies around the globe.

CPA3 and CPA4 offer even higher salt rejection rates. Semiconductor manufacturers rely on Hydranautics to provide the ultrapure water needed for production of sensitive semiconductor chips. And because of their high TOC, silica and hardness rejection, CPA3 and CPA4 are ideal for producing low-scaling boiler make-up water for power generation applications. CPA membranes provide the highest salt rejection rates available - every element on every order for every customer.

-- Please consider the CPA-400-7 elements as a substitute for the CPA2-7 or the CPA3-7 elements. The CPA-400-7 elements were originally intended as CPA3-7's but did not meet Hydranautics' specifications for CPA3-7's. They are 400 square foot elements, whereas the CPA2-7's are 365 square foot elements.

CPA-400-7 +

Size: 8.0 x 40

Flow Rate: 10,000

Test Conditions

The stated performance is initial (data taken after 30 minutes of operation), based on the following conditions:

NaCl Solution, PPM 1500

Applied Pressure, psig (MPa) 225 psi (1.55)

Operating Temperature, °F (°C) 77° (25°)

Permeate Recovery 15%

pH Range 6.5-7.0

Application Data

Maximum Applied Pressure, psig (MPa) 600 (4.14)

Maximum Feed Flow, GPM (m3/h) 4040-16(3.6), 8-inch-75 (17.0)

Maximum Operating Temperature, °F (°C) 113° (45°)

Feedwater pH Range* 3.0-10.0

Maximum Feedwater Turbidity, NTU 1.0

Maximum Feedwater SDI (15 mins) 5.0

Maximum Chlorine Concentration, PPM <0.1

Maximum Ratio of Concentrate to Permeate Flow for Any Element 5:1

Maximum Pressure Drop for Each Element, psig 10