Fouling Resistant membranes

Membranes intended for applications with feed water that has fouling potential, subject to appropriate pretreatment.

Membrane system for challenging feed water

Quick Summary

The Fouling Resistant series is intended for challenging feed water where membrane fouling is a concern. Suitability depends on pretreatment, water quality and operating conditions, and is reviewed by the Nimbus team before any model is recommended.

Suitable application

Reviewed for water sources with significant organic, colloidal or biological loading.

Selection conditions

Fit is determined by feed water characterization, the pretreatment train and planned cleaning frequency.

Fouling Resistant Series Models

This series is intended for applications where feed water conditions may increase fouling potential. Final model selection depends on water quality and operating conditions.

NIM-BW-8040XLFR

Active Membrane Area

Active Membrane Area: 400 ft² (37.2 m²)

Operating Limits

Max Operating Pressure: 600 psi (41 bar)
Max Operating Temperature: 45°C (113°F)
Continuous Operating pH: 2.0–11.0
CIP pH Range: 1.0–12.0
Maximum Feed Water Silt Density Index: SDI15 < 5.0
Free Chlorine Tolerance: < 0.1 ppm
Max Pressure Drop per Element: 15 psi (1.0 bar)

Dimensions

Length: 40.0 in (1,016 mm)
Outer Diameter: 7.9 in (201 mm)
Central Tube Diameter: 1.125 in (28.6 mm)

Standard Test Conditions

Test Pressure: 225 psi
Salt Concentration: 2000 ppm NaCl
Test Temperature: 25°C
Recovery: 15%
Test pH: 7.5-8.0

Values are measured at the stated test conditions and are not a commitment to field performance. Engineering review is required for every application.

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NIM-BW-FR-8040-LD

Fouling Resistant Membrane

8040 Format

Nominal permeate flow: 10,500 GPD (39.7 m³/d)
Nominal salt rejection: 99.75%
Active Membrane Area: 400 ft² (37.2 m²)
Max Operating Pressure: 600 psi (41 bar)

Nominal flow and rejection at the model’s test conditions; not a commitment to field performance.

Full Specs

Active Membrane Area

Active Membrane Area: 400 ft² (37.2 m²)

Operating Limits

Max Operating Pressure: 600 psi (41 bar)
Max Operating Temperature: 45°C (113°F)
Continuous Operating pH: 2.0–11.0
CIP pH Range: 1.0–12.0
Maximum Feed Water Silt Density Index: SDI15 < 5.0
Free Chlorine Tolerance: < 0.1 ppm
Max Pressure Drop per Element: 15 psi (1.0 bar)

Dimensions

Length: 40.0 in (1,016 mm)
Outer Diameter: 7.9 in (201 mm)
Central Tube Diameter: 1.125 in (28.6 mm)

Standard Test Conditions

Test Pressure: 225 psi
Salt Concentration: 2000 ppm NaCl
Test Temperature: 25°C
Recovery: 15%
Test pH: 7.5-8.0

Values are measured at the stated test conditions and are not a commitment to field performance. Engineering review is required for every application.

Request a Quote

NIM-BW-FR-4040

Fouling Resistant Membrane

4040 Format

Nominal permeate flow: 2,300 GPD (8.7 m³/d)
Nominal salt rejection: 99.6%
Active Membrane Area: 85–90 ft² (7.9–8.4 m²)
Max Operating Pressure: 600 psi (41 bar)

Nominal flow and rejection at the model’s test conditions; not a commitment to field performance.

Full Specs

Active Membrane Area

Active Membrane Area: 85–90 ft² (7.9–8.4 m²)

Operating Limits

Max Operating Pressure: 600 psi (41 bar)
Max Operating Temperature: 45°C (113°F)
Continuous Operating pH: 2.0–11.0
CIP pH Range: 1.0–12.0
Maximum Feed Water Silt Density Index: SDI15 < 5.0
Free Chlorine Tolerance: < 0.1 ppm
Max Pressure Drop per Element: 15 psi (1.0 bar)

Dimensions

Length: 40.0 in (1,016 mm)
Outer Diameter: 3.9 in (99 mm)
Central Tube Diameter: 0.75 in (19.0 mm)

Standard Test Conditions

Test Pressure: 225 psi
Salt Concentration: 2000 ppm NaCl
Test Temperature: 25°C
Recovery: 15%
Test pH: 7.5-8.0

Values are measured at the stated test conditions and are not a commitment to field performance. Engineering review is required for every application.

Request a Quote

Membranes For Challenging Feed Conditions

This category may be reviewed where operating conditions create additional treatment and maintenance considerations.

Check a Nimbus Alternative

Selecting a water-treatment solution is an engineering and operational process. It begins with the water source, composition, variation over time, required flow, target quality, operating hours, site constraints and maintenance approach. A technology name alone is not sufficient to establish suitability.

Website information is general and is not a quotation, binding specification, fit approval or engineering approval. Scope, equipment, performance and conditions will be determined only after data review and an approved Nimbus proposal.