What Are Hydranautics Membranes?
Hydranautics (a Nitto group company) makes high-performance RO membrane elements, especially their CPA (Composite Polyamide) line. These deliver excellent salt rejection, high flow rates, and are suited for feed waters with high Total Dissolved Solids (TDS). (Romegamart)
Membrane sizes like 8040 (8-inch diameter × 40-inch length) are common in large RO plants. 4040 versions are used in smaller or modular units. (Romegamart)
Key Technical Highlights & Catalogue Info
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The CPA family includes models like CPA2, CPA3, CPA5, CPA6, CPA7, with variations (LD = Low Differential, MAX etc.) for feed pressure, fouling, or recovery needs. (Romegamart)
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Membranes are available in both 4-inch and 8-inch diameters.
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Typical salt rejection rates are very high (~ 99.5-99.8%) under standard operating conditions. (Romegamart)
Hydranautics Membrane Price & Dealers in India
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In India, Hydranautics membrane 8040 price (for CPA2/CPA3/CPA5-LD types) generally ranges between ₹30,000-₹38,000 per piece in many authorised outlets. Dealers like Unitech Water Solution (Ahmedabad) frequently list CPA2-8040 around ₹30,000. (Romegamart)
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There are also 4040 sized membranes (e.g. CPA2-4040) available via suppliers like RomegaMart and Jazz Pure Water Solutions for lower capacities.
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Hydranautics membrane dealers in India include authorised distributors such as Unitech, Soft Tech Ion Exchange, among others. These dealers provide full support, genuine catalogue information and often supply in bulk. (Romegamart)
Matching Your Needs: 8040 vs 4040
| Feature | 8040 | 4040 |
|---|---|---|
| Size | 8-inch dia × 40-inch length | 4-inch dia × 40-inch length |
| Application | Larger, high-capacity / industrial RO plants | Smaller systems, modular or lower flow requirements |
| Price | Higher due to size & higher membrane area | Lower in absolute cost; suitable for a smaller scale |
Why Choose Hydranautics Membranes?
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Long operational life with good reliability.
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High salt rejection even in tough feed waters.
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Wide catalogue: many variants for different pressures, feed water quality, and fouling conditions.
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Strong Indian presence so easier procurement, support, and warranty via Hydranautics Membrane Distributors within India.

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