Hydranautics NANO-SW Membrane

Product Description

The NANO-SW nanofiltration membrane product line is primarily used in the oil and gas industry. These membranes are high-performance nanofiltration membranes which are able to selectively remove sulfate, thereby reducing the risks of scaling and reservoir souring when seawater is injected into the oil containing reservoirs for secondary oil production in offshore production. The membrane rejects 99.8% of sulfate while passing other ions, particularly monovalent ions such as chloride and sodium, allowing for ultra-low-pressure operations.

They use patented Low Differential LD™ technology designed to minimize colloidal fouling. NANO-SW membranes use a patented 34 mil thickness feed spacer that prevents colloidal fouling and increases the effectiveness of membrane cleaning – resulting in lower differential pressure.

As a result, the NANO-SW membrane does not need to be cleaned frequently – thus reducing treatment cost – while offering extreme durability and consistent performance.

NANO-SW membrane is globally acclaimed for high sulfate rejection characteristics in oil and gas seawater injection applications. It significantly reduces operating costs and provides optimum hardness rejection in softening applications.


NANO-SW Specifications:
  • MgSO4 Permeate Flow (Nominal): 11,000 gpd (41.6 m3/d)
  • MgSO4 Rejection: 99.8% (99.6% minimum)
  • Configuration: Spiral Wound
  • Membrane Polymer: Composite Polyamide
  • Nominal Membrane Area: 400 ft2 (37 m2)
  • Feed/Brine Spacer Thickness: 34 mil (0.87 mm)

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

  • 2000 ppm MgSO4
  • 130 psi (0.9 MPa) Applied Pressure
  • 77°F (25 °C) Operating Temperature
  • 15% Permeate Recovery
  • 6.5 – 7.0 Feed pH



Standard Operating Limits:
  • Maxium Applied Pressure (Recommended): 600 psig (4.14 MPa)
  • Maximum Chlorine Concentration: < 0.1 PPM
  • Maximum Operating Temperature: 113°F (45°C)
  • pH Range, Operation (Cleaning): 3.0 - 9.0 (1.0 – 11.5)
  • Maximum Feedwater Turbidity: 1.0 NTU
  • Maximum Feedwater SDI (15 mins): 5.0
  • Maximum Feed Flow: 75 GPM (17.0 m3/h)
  • Maximum Pressure Drop for Each Element: 15 psi
  • Typical Seawater Performance†:
  • Nominal Permeate Flow: 6,500 gpd (24.6 m3/d)
  • Nominal Chloride Rejection: 25%
  • Nominal Sulfate Rejection: 99.8%



  • Filtering oils and gasses
  • Industrial use


[custom-documents] [/custom-documents]
(1 review) Write a Review
  • 5
    Terrific product. Gets the job done in removing organic substances from my water supply with low maintenance required.

    Posted by Fellismina C. on Sep 25th 2018

    Solid leak performance!

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