What influences membrane performance over time?

Membrane performance may be influenced by feed water quality, operating conditions, contaminant loading, salinity, temperature, pretreatment quality, cleaning practices and long-term process stability.

What is membrane fouling?

Fouling refers to the accumulation of materials on membrane surfaces. Different fouling mechanisms may affect system operation in different ways.

What is scaling in RO systems?

Scaling refers to precipitation of dissolved constituents under certain operating conditions. Risk evaluation depends on feed chemistry and operating parameters.

Can one membrane be suitable for multiple applications?

Potentially, but suitability depends on water quality objectives, operating conditions and project-specific requirements.

Why are membrane test conditions important?

Performance values are dependent on test conditions. Understanding those conditions helps interpret technical data appropriately.

What membrane types are used in water treatment systems?

Water treatment systems may incorporate different membrane technologies including reverse osmosis (RO), nanofiltration (NF), ultrafiltration (UF) and other membrane processes depending on application requirements. Each technology operates through different separation mechanisms and treatment objectives.

What is an RO membrane?

RO membranes are used in reverse osmosis systems and are commonly evaluated in applications requiring treatment of dissolved salts and other constituents according to project requirements.

What is a UF membrane?

UF membranes are used in ultrafiltration systems and provide physical separation of particles, colloids and other constituents according to application requirements.

What is an NF membrane?

NF membranes are used in nanofiltration systems and may be evaluated when selective separation of specific constituents is required.

What are brackish water membranes?

Brackish water membranes are evaluated for water sources with elevated dissolved solids compared to municipal water but generally lower salinity than seawater.

What are seawater membranes?

Seawater membranes are intended for applications involving high-salinity water sources. Suitability depends on feed conditions and project requirements.

What are Low Energy membranes?

Low Energy membrane families may be evaluated where energy efficiency is an important design consideration. Final suitability depends on project requirements.

What are High Rejection membranes?

High Rejection membrane families are often evaluated where treated-water quality is a primary project consideration.

What are High Flow membranes?

High Flow membrane families may be considered in projects where throughput characteristics are an important design factor.

What is a Fouling Resistant membrane?

Fouling Resistant membrane families may be evaluated where fouling management is an important operational consideration.

Is there a single membrane suitable for every application?

No. Different applications involve different water characteristics, process objectives and operating requirements.

How is the choice made between RO, NF and UF?

Selection depends on treatment objectives, target water quality, feed-water characteristics and operating conditions.

Why is understanding membrane type important before selecting a treatment system?

Membrane type influences treatment strategy, operating considerations, pretreatment requirements and system integration.

What is the difference between a membrane and a filter?

Membranes and filters use different separation approaches and may serve different treatment objectives.

How does feed-water quality influence membrane selection?

Feed-water quality influences technology selection, operating conditions and design considerations.

Can membranes from different manufacturers be compared?

Source information and testing conditions may be reviewed while accounting for differences in testing methodology.

Why are testing conditions important?

Performance data may depend on testing conditions and should be interpreted accordingly.

How is membrane technology evaluated for a new project?

Evaluation considers feed-water quality, treatment objectives, operating conditions and project requirements.

What is an industrial membrane?

An industrial membrane is a separation element used in water treatment processes.

How is a membrane selected?

Selection is based on water quality data, operating conditions and project objectives.

What is the difference between RO and NF?

RO and NF are different membrane technologies with different separation objectives.

What is the difference between UF and RO?

UF and RO use different separation mechanisms and often serve different functions within treatment systems.

Can membrane family alone determine suitability?

No. Water quality data and operating conditions should also be reviewed.

Membranes and Engineering Solutions

Nimbus engineering solution categories and approved specifications, subject to source verification and approval.

Check a Nimbus Alternative

Quick Summary

Nimbus defines reverse osmosis and nanofiltration engineering solution categories for industrial, commercial and municipal applications. Membrane selection follows feed water quality, the application and operating conditions, and suitability is confirmed only after reviewing site data.

Membrane families

Low Energy membranes

Membranes designed to reduce process energy use, subject to approved feed conditions and design.

High Rejection membranes

Membranes intended for applications requiring a high level of solute rejection, subject to review and approval.

High Flow membranes

Membranes intended for applications requiring relatively high permeate flow, subject to feed conditions and approval.

Fouling Resistant membranes

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

Seawater desalination membranes

Membranes intended for seawater treatment, subject to feed data, design conditions and pretreatment.

Nanofiltration membranes

Membranes intended for selective separation processes, subject to application and feed data.

Three Leading Models for Industry in Israel

Industrial RO membrane elements in 8040 and 4040 formats

NIM-BW-8040

NIM-BW-8040XLFR

NIM-SW-8040-HF

Nimbus Membrane Catalogue

Nimbus membrane models are listed by series and format. Values refer to the stated test conditions only.

Filter by seriesFilter by format

31 models shown

Nimbus Membrane Catalogue
Nimbus model	Series	Format	Feed spacer	Nominal permeate flow	Nominal salt rejection	Test conditions
NIM-XLE-8040-HF	Extreme Low Pressure	8040	28mil	13,000 GPD49.2 m³/d	99%	100psi, 500ppm Nacl,15% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-XLE-8040-HF Active Membrane Area Active Membrane Area 440 ft² (40.9 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 100 psi Salt Concentration 500 ppm NaCl Test Temperature 25°C Recovery 15% Test pH 7.5-8.0
NIM-XLE-8040	Extreme Low Pressure	8040	28mil	11,000 GPD41.6 m³/d	99.2%	100psi, 500ppm Nacl,15% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-XLE-8040 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 100 psi Salt Concentration 500 ppm NaCl Test Temperature 25°C Recovery 15% Test pH 7.5-8.0
NIM-XLE-4040-HF	Extreme Low Pressure	4040	28mil	3,500 GPD13.2 m³/d	99%	100psi, 500ppm Nacl,15% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-XLE-4040-HF 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 100 psi Salt Concentration 500 ppm NaCl Test Temperature 25°C Recovery 15% Test pH 7.5-8.0
NIM-XLE-4040	Extreme Low Pressure	4040	28mil	2,600 GPD9.8 m³/d	99.2%	100psi, 500ppm Nacl,15% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-XLE-4040 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 100 psi Salt Concentration 500 ppm NaCl Test Temperature 25°C Recovery 15% Test pH 7.5-8.0
NIM-BW-LE-8040-HF	Low Pressure	8040	28mil	12,500 GPD47.3 m³/d	99.5%	150psi,1500ppm Nacl,15% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-BW-LE-8040-HF Active Membrane Area Active Membrane Area 440 ft² (40.9 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 150 psi Salt Concentration 1500 ppm NaCl Test Temperature 25°C Recovery 15% Test pH 7.5-8.0
NIM-BW-LE-8040-MR	Low Pressure	8040	28mil	10,500 GPD39.7 m³/d	99.6%	150psi,1500ppm Nacl,15% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-BW-LE-8040-MR 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 150 psi Salt Concentration 1500 ppm NaCl Test Temperature 25°C Recovery 15% Test pH 7.5-8.0
NIM-BW-LE-4040-HF	Low Pressure	4040	28mil	2,700 GPD10.2 m³/d	99.5%	150psi,1500ppm Nacl,15% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-BW-LE-4040-HF 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 150 psi Salt Concentration 1500 ppm NaCl Test Temperature 25°C Recovery 15% Test pH 7.5-8.0
NIM-BW-LE-4040-MR	Low Pressure	4040	28mil	2,400 GPD9.1 m³/d	99.6%	150psi,1500ppm Nacl,15% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-BW-LE-4040-MR 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 150 psi Salt Concentration 1500 ppm NaCl Test Temperature 25°C Recovery 15% Test pH 7.5-8.0
NIM-BW-8040-HF	Brackish Water	8040	28mil	13,000 GPD49.2 m³/d	99.55%	225psi,2000ppm Nacl,15% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-BW-8040-HF Active Membrane Area Active Membrane Area 440 ft² (40.9 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
NIM-BW-8040 Most Popular in Israel	Brackish Water	8040	28mil	10,500 GPD39.7 m³/d	99.7%	225psi,2000ppm Nacl,15% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-BW-8040 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
NIM-BW-8040-E	Brackish Water	8040	28mil	10,500 GPD39.7 m³/d	99.55%	225psi,2000ppm Nacl,15% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-BW-8040-E 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
NIM-BW-4040-HF	Brackish Water	4040	28mil	2,900 GPD11 m³/d	99.5%	225psi,2000ppm Nacl,15% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-BW-4040-HF 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
NIM-BW-4040	Brackish Water	4040	28mil	2,500 GPD9.5 m³/d	99.6%	225psi,2000ppm Nacl,15% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-BW-4040 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
NIM-BW-4040-E	Brackish Water	4040	28mil	2,400 GPD9.1 m³/d	99.5%	225psi,2000ppm Nacl,15% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-BW-4040-E 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
NIM-BW-8040XLFR Most Popular in Israel	Fouling Resistant	8040	34mil	11,500 GPD43.5 m³/d	99.75%	225psi,2000ppm Nacl,15% recovery rate, 25℃，PH 7.5-8.0
Full Specs — 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
NIM-BW-FR-8040-LD	Fouling Resistant	8040	34mil-LD	10,500 GPD39.7 m³/d	99.75%	225psi,2000ppm Nacl,15% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-BW-FR-8040-LD 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
NIM-BW-FR-4040	Fouling Resistant	4040	34mil	2,300 GPD8.7 m³/d	99.6%	225psi,2000ppm Nacl,15% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-BW-FR-4040 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
NIM-SW-8040-HF Most Popular in Israel	Sea Water	8040	28mil	9,000 GPD34.1 m³/d	99.85%	800psi,32000ppm Nacl,8% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-SW-8040-HF Active Membrane Area Active Membrane Area 440 ft² (40.9 m²) Operating Limits Max Operating Pressure 1,200 psi (83 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 800 psi Salt Concentration 32000 ppm NaCl Test Temperature 25°C Recovery 8% Test pH 7.5-8.0
NIM-SW-8040-FR	Sea Water	8040	34mil-LD	9,000 GPD34.1 m³/d	99.85%	800psi,32000ppm Nacl,8% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-SW-8040-FR Active Membrane Area Active Membrane Area 380–400 ft² Operating Limits Max Operating Pressure 1,200 psi (83 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 800 psi Salt Concentration 32000 ppm NaCl Test Temperature 25°C Recovery 8% Test pH 7.5-8.0
NIM-SW-8040-SHF	Sea Water	8040	28mil	10,000 GPD37.9 m³/d	99.75%	800psi,32000ppm Nacl,8% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-SW-8040-SHF Active Membrane Area Active Membrane Area 440 ft² (40.9 m²) Operating Limits Max Operating Pressure 1,200 psi (83 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 800 psi Salt Concentration 32000 ppm NaCl Test Temperature 25°C Recovery 8% Test pH 7.5-8.0
NIM-SW-4040-HF	Sea Water	4040	28mil	2,000 GPD7.6 m³/d	99.8%	800psi,32000ppm Nacl,8% recovery rate, 25℃，PH 7.5-8.0
Full Specs — NIM-SW-4040-HF Active Membrane Area Active Membrane Area 85–90 ft² (7.9–8.4 m²) Operating Limits Max Operating Pressure 1,200 psi (83 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 800 psi Salt Concentration 32000 ppm NaCl Test Temperature 25°C Recovery 8% Test pH 7.5-8.0
NIM-NF1-8040	Nanofiltration (NF) — High Rejection	8040	—	—	—	—
NIM-NF1-8040R	Nanofiltration (NF) — High Rejection	8040	—	—	—	—
NIM-NF1-4040	Nanofiltration (NF) — High Rejection	4040	—	—	—	—
NIM-NF1-4040R	Nanofiltration (NF) — High Rejection	4040	—	—	—	—
NIM-NF1-2540	Nanofiltration (NF) — High Rejection	2540	—	—	—	—
NIM-NF2-8040	Nanofiltration (NF) — High Permeability	8040	—	—	—	—
NIM-NF2-4040	Nanofiltration (NF) — High Permeability	4040	—	—	—	—
NIM-NF2-2540	Nanofiltration (NF) — High Permeability	2540	—	—	—	—
NIM-MS-8040M	Nanofiltration (NF) — Material Separation	8040	—	—	—	—
NIM-MS-8040H	Nanofiltration (NF) — Material Separation	8040	—	—	—	—

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

Engineering Considerations For Industrial Membrane Selection

Industrial membrane selection requires evaluation of engineering, operational and application-specific considerations. Feed water quality, dissolved solids concentration, contaminant profile, operating temperature, target water quality and system operating conditions all contribute to the decision-making process. Additional factors often include maintenance strategy, pretreatment availability, monitoring requirements, cleaning procedures and integration into the overall treatment train.

Different industrial projects may require entirely different membrane configurations even when supplied from similar water sources. This is driven by variations in process objectives, production requirements, target water quality and site operating conditions. For this reason, membrane selection is typically based on project-specific engineering review rather than product-family classification alone.

RO Membranes For Industrial Applications

Reverse osmosis membranes are a core component of industrial water treatment systems. They are widely used in process water production, brackish water treatment, seawater desalination and high-quality water applications.

Evaluation of RO systems includes feed water quality, flow requirements, water quality objectives and operating conditions. Effective system planning also considers pretreatment, operational configuration and integration within the overall treatment process.

Membrane Lifecycle Considerations

Membrane performance over time is influenced by feed water quality, suspended solids loading, chemistry, operating conditions, cleaning frequency and pretreatment quality. Lifecycle management therefore includes monitoring operational data, water quality trends and performance indicators over extended periods.

Such an approach supports early identification of operational changes and helps plan maintenance activities according to facility requirements.

What influences membrane performance over time?: Membrane performance may be influenced by feed water quality, operating conditions, contaminant loading, salinity, temperature, pretreatment quality, cleaning practices and long-term process stability.
What is membrane fouling?: Fouling refers to the accumulation of materials on membrane surfaces. Different fouling mechanisms may affect system operation in different ways.
What is scaling in RO systems?: Scaling refers to precipitation of dissolved constituents under certain operating conditions. Risk evaluation depends on feed chemistry and operating parameters.
Can one membrane be suitable for multiple applications?: Potentially, but suitability depends on water quality objectives, operating conditions and project-specific requirements.
Why are membrane test conditions important?: Performance values are dependent on test conditions. Understanding those conditions helps interpret technical data appropriately.

Frequently Asked Questions About Industrial Membranes

What membrane types are used in water treatment systems?: Water treatment systems may incorporate different membrane technologies including reverse osmosis (RO), nanofiltration (NF), ultrafiltration (UF) and other membrane processes depending on application requirements. Each technology operates through different separation mechanisms and treatment objectives.
What is an RO membrane?: RO membranes are used in reverse osmosis systems and are commonly evaluated in applications requiring treatment of dissolved salts and other constituents according to project requirements.
What is a UF membrane?: UF membranes are used in ultrafiltration systems and provide physical separation of particles, colloids and other constituents according to application requirements.
What is an NF membrane?: NF membranes are used in nanofiltration systems and may be evaluated when selective separation of specific constituents is required.
What are brackish water membranes?: Brackish water membranes are evaluated for water sources with elevated dissolved solids compared to municipal water but generally lower salinity than seawater.
What are seawater membranes?: Seawater membranes are intended for applications involving high-salinity water sources. Suitability depends on feed conditions and project requirements.
What are Low Energy membranes?: Low Energy membrane families may be evaluated where energy efficiency is an important design consideration. Final suitability depends on project requirements.
What are High Rejection membranes?: High Rejection membrane families are often evaluated where treated-water quality is a primary project consideration.
What are High Flow membranes?: High Flow membrane families may be considered in projects where throughput characteristics are an important design factor.
What is a Fouling Resistant membrane?: Fouling Resistant membrane families may be evaluated where fouling management is an important operational consideration.
Is there a single membrane suitable for every application?: No. Different applications involve different water characteristics, process objectives and operating requirements.
How is the choice made between RO, NF and UF?: Selection depends on treatment objectives, target water quality, feed-water characteristics and operating conditions.
Why is understanding membrane type important before selecting a treatment system?: Membrane type influences treatment strategy, operating considerations, pretreatment requirements and system integration.

What is the difference between a membrane and a filter?: Membranes and filters use different separation approaches and may serve different treatment objectives.
How does feed-water quality influence membrane selection?: Feed-water quality influences technology selection, operating conditions and design considerations.
Can membranes from different manufacturers be compared?: Source information and testing conditions may be reviewed while accounting for differences in testing methodology.
Why are testing conditions important?: Performance data may depend on testing conditions and should be interpreted accordingly.
How is membrane technology evaluated for a new project?: Evaluation considers feed-water quality, treatment objectives, operating conditions and project requirements.

What is an industrial membrane?: An industrial membrane is a separation element used in water treatment processes.
How is a membrane selected?: Selection is based on water quality data, operating conditions and project objectives.
What is the difference between RO and NF?: RO and NF are different membrane technologies with different separation objectives.
What is the difference between UF and RO?: UF and RO use different separation mechanisms and often serve different functions within treatment systems.
Can membrane family alone determine suitability?: No. Water quality data and operating conditions should also be reviewed.

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.

Membranes and Engineering Solutions

Quick Summary

Membrane families

Low Energy membranes

High Rejection membranes

High Flow membranes

Fouling Resistant membranes

Seawater desalination membranes

Nanofiltration membranes

Three Leading Models for Industry in Israel

NIM-BW-8040

NIM-BW-8040XLFR

NIM-SW-8040-HF

Nimbus Membrane Catalogue

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Active Membrane Area

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Standard Test Conditions

Active Membrane Area

Operating Limits

Dimensions

Standard Test Conditions

Active Membrane Area

Operating Limits