The D-Series family of proprietary thin-film nanofiltration membrane elements is characterized by an approximate molecular weight cut-off of 150-300 Dalton for uncharged organic molecules. Divalent and multivalent anions are preferentially rejected by the membrane while monovalent ion rejection is dependent upon feed concentration and composition. Since monovalent ions pass through the membrane, they do not contribute to the osmotic pressure, thus enabling D-Series nanofiltration membrane systems to operate at feed pressures below those of RO systems.

Among other applications, DK High Rejection NF Elements are used for dye brine purification, demineralization / concentration of organic solutions and metals recovery.

Typical Operating Flux: 5-20 GFD (8-34 LMH)
Maximum Operating Pressure:

600psi (4,137kPa) if T<95°F (35°C)
435psi (3,000kPa) if T>95°F (35°C)
Maximum Temperature:

Continuous Operation: 122°F (50°C)
Clean-In-Place (CIP): 122°F (50°C)
pH Range:

Continuous Operation: 3.0 – 9.0
Clean-In-Place (CIP): 2.0 -11.0
Maximum Pressure Drop:

Over an element: 15 psi (103 kPa)
Per housing: 60 psi (414 kPa)
Chlorine Tolerance: 500 ppm hours, dechlorination recommended

Feed water: NTU < 1 SDI₁₅ < 5

The D-Series family of proprietary thin-film nanofiltration membrane elements is characterized by an approximate molecular weight cut-off of 150-300 Dalton for uncharged organic molecules. Divalent and multivalent anions are preferentially rejected by the membrane while monovalent ion rejection is dependent upon feed concentration and composition. Since monovalent ions pass through the membrane, they do not contribute to the osmotic pressure, thus enabling D-Series nanofiltration membrane systems to operate at feed pressures below those of RO systems.

Among other applications, DK High Rejection NF Elements are used for dye brine purification, demineralization / concentration of organic solutions and metals recovery.

Typical Operating Flux: 5-20 GFD (8-34 LMH)
Maximum Operating Pressure:

600psi (4,137kPa) if T<95°F (35°C)
435psi (3,000kPa) if T>95°F (35°C)
Maximum Temperature:

Continuous Operation: 122°F (50°C)
Clean-In-Place (CIP): 122°F (50°C)
pH Range:

Continuous Operation: 3.0 – 9.0
Clean-In-Place (CIP): 2.0 -11.0
Maximum Pressure Drop:

Over an element: 15 psi (103 kPa)
Per housing: 60 psi (414 kPa)
Chlorine Tolerance: 500 ppm hours, dechlorination recommended

Feed water: NTU < 1 SDI₁₅ < 5

The GK Series ultrafiltration (UF) spiral wound membranes are characterized by a molecular weight cutoff (MWCO) of 3,500 on polyethylene glycol (PEG) and a smooth, fouling resistant membrane surface.

GK spiral wound membranes are used for surface water pretreatment, color, or total organic carbon (TOC) reduction, and chemical purification.

Typical Operating Flux: 5-20 GFD (8-34 LMH)
Maximum Operating Pressure: 400 psi (2,760 kPa)
Maximum Temperature:

Continuous Operation: 122°F (50°C)
Clean-In-Place (CIP): 122°F (50°C)
pH Range:

Continuous Operation: 2.0-10.0
Clean-In-Place (CIP): 1.0-13.0 (3)
Maximum Pressure Drop:

Over an element: 15 psi (103 kPa)
Per housing: 60 psi (414 kPa)
Chlorine Tolerance: 20-50 ppm days

The GK Series ultrafiltration (UF) spiral wound membranes are characterized by a molecular weight cutoff (MWCO) of 3,500 on polyethylene glycol (PEG) and a smooth, fouling resistant membrane surface.

GK spiral wound membranes are used for surface water pretreatment, color, or total organic carbon (TOC) reduction, and chemical purification.

Typical Operating Flux: 5-20 GFD (8-34 LMH)
Maximum Operating Pressure: 400 psi (2,760 kPa)
Maximum Temperature:

Continuous Operation: 122°F (50°C)
Clean-In-Place (CIP): 122°F (50°C)
pH Range:

Continuous Operation: 2.0-10.0
Clean-In-Place (CIP): 1.0-13.0 (3)
Maximum Pressure Drop:

Over an element: 15 psi (103 kPa)
Per housing: 60 psi (414 kPa)
Chlorine Tolerance: 20-50 ppm days

The RL Series nanofiltration elements are made with a proprietary thin-film membrane characterized by high flux and high rejection of sulfate salts, hardness, heavy metals, and recalcitrant organic compounds contributing to chemical oxygen demand (COD). The RL membrane has an approximate molecular weight cut-off of 200-400 Dalton for uncharged organic molecules.

RL Series elements are typically applied to remove and concentrate sulfate salts, hardness, and hard-to-degrade COD from industrial wastewater or effluent, such as cooling tower blowdown, reverse osmosis reject, landfill leachate, secondary and tertiary effluent. The COD and the concentration ratio of divalent and multi-valent salts to monovalent salts would reduce significantly in the permeate stream, thereby enabling its beneficial reuse and waste reduction.

Typical Operating Pressure: 60-300 psi (414-2,069 kPa)
Typical Operating Flux: 10-20 GFD (15-35 LMH)
Maximum Operating Pressure: 600 psi (4,137 kPa)
Maximum Temperature:

Continuous operation: 122°F (50°C)
Clean-In-Place (CIP): 122°F (50°C)
pH Range:

Optimum rejection: 6.0-7.0,
Continuous operation: 3.0-9.0,
Clean-In-Place (CIP): 2.0-11.0
Maximum Pressure Drop:

Over an element: 15 psi (103 kPa)
Per housing: 50 psi (345 kPa)
Chlorine Tolerance: 1,000+ ppm-hours, Dechlorination recommended
Feedwater: NTU < 1 SDI < 3

The RL Series nanofiltration elements are made with a proprietary thin-film membrane characterized by high flux and high rejection of sulfate salts, hardness, heavy metals, and recalcitrant organic compounds contributing to chemical oxygen demand (COD). The RL membrane has an approximate molecular weight cut-off of 200-400 Dalton for uncharged organic molecules.

RL Series elements are typically applied to remove and concentrate sulfate salts, hardness, and hard-to-degrade COD from industrial wastewater or effluent, such as cooling tower blowdown, reverse osmosis reject, landfill leachate, secondary and tertiary effluent. The COD and the concentration ratio of divalent and multi-valent salts to monovalent salts would reduce significantly in the permeate stream, thereby enabling its beneficial reuse and waste reduction.

Typical Operating Pressure: 60-300 psi (414-2,069 kPa)
Typical Operating Flux: 10-20 GFD (15-35 LMH)
Maximum Operating Pressure: 600 psi (4,137 kPa)
Maximum Temperature:

Continuous operation: 122°F (50°C)
Clean-In-Place (CIP): 122°F (50°C)
pH Range:

Optimum rejection: 6.0-7.0,
Continuous operation: 3.0-9.0,
Clean-In-Place (CIP): 2.0-11.0
Maximum Pressure Drop:

Over an element: 15 psi (103 kPa)
Per housing: 50 psi (345 kPa)
Chlorine Tolerance: 1,000+ ppm-hours, Dechlorination recommended
Feedwater: NTU < 1 SDI < 3

The OSMO USPG series has been designed for pharmaceutical applications with a sanitary Full-Fit design. The elements feature a 316 SS electropolished central tube and Noryl ATDs.

The OSMO USPG Elements are typically used in pharmaceutical related processes requiring regulations. All materials used in the OSMO USPG Series have passed testing according to USP Class VI-121°C. Each element is shipped with a certificate of compliance.

Typical Operating Pressure: 200 psi (1,379 kPa)
Typical Operating Flux: 10 – 20 GFD (15 – 35 LMH)
Maximum Operating Pressure: 600 psi (4,137 kPa)
Maximum Temperature:

Continuous operation: 122°F (50°C)
Clean-In-Place (CIP): 122°F (50°C)
pH Range:

Optimum rejection: 7.0-7.5,
Continuous operation: 4.0-11.0,
Clean-In-Place (CIP): 2.0-11.5
Maximum Pressure Drop:

Over an element: 10 psi (69 kPa)
Per housing: 50 psi (345 kPa)
Chlorine Tolerance: 1,000+ ppm-hours, Dechlorination recommended
Feedwater: NTU < 1 SDI < 3

The OSMO USPG series has been designed for pharmaceutical applications with a sanitary Full-Fit design. The elements feature a 316 SS electropolished central tube and Noryl ATDs.

The OSMO USPG Elements are typically used in pharmaceutical related processes requiring regulations. All materials used in the OSMO USPG Series have passed testing according to USP Class VI-121°C. Each element is shipped with a certificate of compliance.

Typical Operating Pressure: 200 psi (1,379 kPa)
Typical Operating Flux: 10 – 20 GFD (15 – 35 LMH)
Maximum Operating Pressure: 600 psi (4,137 kPa)
Maximum Temperature:

Continuous operation: 122°F (50°C)
Clean-In-Place (CIP): 122°F (50°C)
pH Range:

Optimum rejection: 7.0-7.5,
Continuous operation: 4.0-11.0,
Clean-In-Place (CIP): 2.0-11.5
Maximum Pressure Drop:

Over an element: 10 psi (69 kPa)
Per housing: 50 psi (345 kPa)
Chlorine Tolerance: 1,000+ ppm-hours, Dechlorination recommended
Feedwater: NTU < 1 SDI < 3

The OSMO USPG series has been designed for pharmaceutical applications with a sanitary Full-Fit design. The elements feature a 316 SS electropolished central tube and Noryl ATDs.

The OSMO USPG Elements are typically used in pharmaceutical related processes requiring regulations. All materials used in the OSMO USPG Series have passed testing according to USP Class VI-121°C. Each element is shipped with a certificate of compliance.

Typical Operating Pressure: 200 psi (1,379 kPa)
Typical Operating Flux: 10 – 20 GFD (15 – 35 LMH)
Maximum Operating Pressure: 600 psi (4,137 kPa)
Maximum Temperature:

Continuous operation: 122°F (50°C)
Clean-In-Place (CIP): 122°F (50°C)
pH Range:

Optimum rejection: 7.0-7.5,
Continuous operation: 4.0-11.0,
Clean-In-Place (CIP): 2.0-11.5
Maximum Pressure Drop:

Over an element: 10 psi (69 kPa)
Per housing: 50 psi (345 kPa)
Chlorine Tolerance: 1,000+ ppm-hours, Dechlorination recommended
Feedwater: NTU < 1 SDI < 3

The Industrial NF1 nanofiltration elements feature a D-Series proprietary thin-film membrane to remove low solubility salts and organics from concentrated effluents and brines.

The Industrial NF1 will permeate sodium chloride NaCl and reject the sodium sulfate Na2SO4. The Industrial NF1 elements are high pressure elements that can operate up to 80 bar. This salt segregation combined with a high-pressure construction enables production of a pure highly concentrated (> 150 g/L) single salt. The thermal process for Zero Liquid Discharge or Minimum Liquid Discharge projects can greatly be simplified to a crystallizer only, strongly reducing the investment and the operational costs.

Typical Operating Pressure: 5 – 20 GFD (8 – 34 LMH)
Maximum Operating Pressure:

< 77°F (25°C) 1,200psi (8,253kPa)
< 86°F (30°C) 1,000psi (6,895kPa)
< 95°F (35°C) 850psi (5,860kPa)
< 104°F (40°C) 750psi (5,171kPa)
< 113°F (45°C) 670psi (4,619Pa)
< 122°F (50°C) 600psi (4,137kPa)
Maximum Temperature:

Continuous operation: 122°F (50°C)
Clean-In-Place (CIP): 122°F (50°C)
pH Range:

Continuous operation: 3.0 – 9.0
Clean-In-Place (CIP): 2.0 – 11.0
Maximum Pressure Drop:

Over an element: 15psi (103kPa)
Per housing: 60psi (414kPa)
Chlorine Tolerance: 500 ppm x hours, dechlorination recommended
Feedwater: NTU < 1 SDI15 < 5

The Industrial NF1 nanofiltration elements feature a D-Series proprietary thin-film membrane to remove low solubility salts and organics from concentrated effluents and brines.

The Industrial NF1 will permeate sodium chloride NaCl and reject the sodium sulfate Na2SO4. The Industrial NF1 elements are high pressure elements that can operate up to 80 bar. This salt segregation combined with a high-pressure construction enables production of a pure highly concentrated (> 150 g/L) single salt. The thermal process for Zero Liquid Discharge or Minimum Liquid Discharge projects can greatly be simplified to a crystallizer only, strongly reducing the investment and the operational costs.

Typical Operating Pressure: 5 – 20 GFD (8 – 34 LMH)
Maximum Operating Pressure:

< 77°F (25°C) 1,200psi (8,253kPa)
< 86°F (30°C) 1,000psi (6,895kPa)
< 95°F (35°C) 850psi (5,860kPa)
< 104°F (40°C) 750psi (5,171kPa)
< 113°F (45°C) 670psi (4,619Pa)
< 122°F (50°C) 600psi (4,137kPa)
Maximum Temperature:

Continuous operation: 122°F (50°C)
Clean-In-Place (CIP): 122°F (50°C)
pH Range:

Continuous operation: 3.0 – 9.0
Clean-In-Place (CIP): 2.0 – 11.0
Maximum Pressure Drop:

Over an element: 15psi (103kPa)
Per housing: 60psi (414kPa)
Chlorine Tolerance: 500 ppm x hours, dechlorination recommended
Feedwater: NTU < 1 SDI15 < 5