SWC4B-LD Hydranautics RO Membrane


Datasheet Send enquiry

SWC4B membranes use the same polymer chemistry as SWC4 offering highest rejection including boron. SWC4B-LD and SWC4B MAX membranes are used in the production of potable waters when the permeate boron concentration is critical.They do not need the second pass thus reducing capital costs.

SWC4B-LD membranes use patented Low Differential LD™ technology designed to minimize colloidal fouling. They use a patented 34 mil thickness feed spacer that prevents colloidal fouling and increases the effectiveness of membrane cleaning.
As a result, the SWC4-LD membrane does not need to be cleaned frequently – thus reducing treatment cost – while offering extreme durability and consistent performance.


Permeate Flow: 6,500 gpd (24.6 m3/d)
Salt Rejection: 99.8 % (99.7 % minimum)
Boron Rejection (Typical): 95.0%†


Configuration: Spiral Wound
Membrane Polymer: Composite Polyamide
Membrane Active Area: 400 ft2 (37.1m2)
Feed Spacer: 34 mil (0.864 mm)

Application Data

Maximum Applied Pressure: 1200 psig (8.27 MPa)
Maximum Chlorine Concentration: < 0.1 PPM
Maximum Operating Temperature: 113 °F (45 °C)
pH Range, Continuous (Cleaning): 2-11 (1-13)*
Maximum Feedwater Turbidity: 1.0 NTU
Maximum Feedwater SDI (15 mins): 5.0
Maximum Feed Flow: 75 GPM (17.0 m3/h)
Minimum Ratio of Concentrate to
Permeate Flow for any Element: 5:1
Maximum Pressure Drop for Each Element: 15 psi
* The limitations shown here are for general use. For specific projects, operating at more conservative values may ensure the best performance and longest life of the membrane. See Hydranautics Technical Bulletins for more detail on operation limits, cleaning pH, and cleaning temperatures.

Application questions? Price & Availability? Please send us a quick email.

Fields marked with an * are required

  • Overview
  • Process Filtration
  • Our Customers
  • Industrial & Food Filter Bags
  • Enquiry Today
  • Process Filtration
  • Our Customers
  • Stainless Steel Filter
  • Enquiry Today