Permeate Flow Rate
2,500–11,500 GPD (9.5–43.5 m³/day), across model-specific primary test conditions; BW 400 ES L / ES / R: 10,500 GPD (39.7 m³/day); BW 400 R G2: 11,500 GPD (43.5 m³/day); BW 4040 R: 2,500 GPD (9.5 m³/day); CW 4040 SF: 2,900 GPD (11.0 m³/day)
Features and Benefits
BW 400 ES L / ES: high permeate flow and salt rejection at low feed pressures, low energy consumption and high permeate water quality; ES also documents good durability and long-lasting reliability
BW 400 ES L / R G2: optimized membrane surface hydraulics, reduced differential pressure, reduced cleaning frequency, chemical use, membrane replacements, energy consumption and total cost of plant ownership
BW 400 R / BW 4040 R: high salt rejection, good fouling resistance and durability, high permeate water quality and long-lasting reliable performance
BW 400 R G2: excellent fouling resistance and durability, stable performance recovery after cleanings
CW 4040 SF: good durability, low energy consumption; shipped dry
Maximum Pressure Drop per Element
15 psi (1.0 bar)
Wet Weight
4–16 kg (8.8–35 lb); BW 400 models: 16 kg (35 lb); BW 4040 R and CW 4040 SF: 4.0 kg (8.8 lb)
pH Range, Continuous Operation
2–11
Maximum Feed Water SDI15
5.0
Membrane Technology
TFN technology
Dimensional Qualification
All dimensional information is indicative and for reference only; contact NanoH2O for detailed technical specifications.
Referential Stabilized Salt Rejection
Test Condition B only: BW 400 ES L / ES: 99.66%; BW 400 R: 99.65%; BW 400 R G2: 99.82%
Manufacturer
NanoH2O Co., Ltd.
Element Outside Diameter
100–200 mm (3.9–7.9 in.); BW 400 models: 200 mm (7.9 in.); BW 4040 R and CW 4040 SF: 100 mm (3.9 in.)
Maximum Operating Temperature
45°C (113°F)
Core Tube Extension
BW 4040 R and CW 4040 SF: 29 mm (1.1 in.)
Referential Test Condition B
BW 400 models only: 1,500 ppm NaCl, 25°C (77°F), pH 7, 15% recovery; ES L / ES: 150 psi (10.3 bar); R / R G2: 225 psi (15.5 bar)
Element Length
1,016 mm (40 in.)
Minimum Salt Rejection
98.0–99.65%, across model-specific primary test conditions; BW 400 ES L / ES / R: 99.5%; BW 400 R G2: 99.65%; BW 4040 R: 99.3%; CW 4040 SF: 98.0%
Applications
Industrial process water, Municipal drinking water, Water reuse, Light industrial process water, Commercial applications, Spot-free rinse car wash systems
Feed Spacer Type
Low dP spacer: BW 400 ES L and BW 400 R G2
Maximum Feed Water Turbidity
1.0 NTU
Referential Permeate Flow Rate
Test Condition B only: BW 400 ES L / ES: 11,160 GPD (43.9 m³/day), as printed; BW 400 R: 11,000 GPD (41.6 m³/day); BW 400 R G2: 12,000 GPD (45.4 m³/day)
Referential Minimum Salt Rejection
Test Condition B only: BW 400 ES L / ES / R: 99.56%; BW 400 R G2: 99.69%
Performance Data Qualification
Normalized performance, not a guaranteed field output. ES L and ES Test Condition B flow values are reproduced as printed; 11,160 GPD and 43.9 m³/day are not equivalent conversions and require manufacturer clarification.
Dry Weight
BW 400 R G2: 12.5 kg (27.6 lb)
pH Range, Cleaning
BW 400 R G2: 1–13; all other supplied models: 2–12
Applications by Model
BW 400 ES L / R / R G2: Industrial process water; Municipal drinking water; Water reuse
BW 400 ES: Industrial process water; Municipal drinking water
BW 4040 R: Light industrial process water; Commercial applications
CW 4040 SF: Spot-free rinse car wash systems; Commercial applications
Maximum Applied Pressure
600 psi (41.3 bar)
Operating Qualification
General-use limits; specific applications may require more conservative operation. Performance depends on proper storage, installation, operation and maintenance per manufacturer instructions.
Certification
All six supplied models: certified to NSF/ANSI/CAN Standard 61 for drinking water systems
Stabilized Salt Rejection
99.0–99.8%, across model-specific primary test conditions; BW 400 ES L / ES / R and BW 4040 R: 99.6%; BW 400 R G2: 99.8%; CW 4040 SF: 99.0%
Maximum Feed Flow
16–85 gpm (3.6–19.3 m³/h); BW 400 R G2: 85 gpm (19.3 m³/h); other BW 400 models: 75 gpm (17 m³/h); BW 4040 R and CW 4040 SF: 16 gpm (3.6 m³/h)
Core Tube Inside Diameter
19–28.6 mm (0.75–1.125 in.); BW 400 models: 28.6 mm (1.125 in.); BW 4040 R and CW 4040 SF: 19 mm (0.75 in.)
Product Type
Reverse osmosis membrane elements
Maximum Chlorine Concentration
BW models: 0.1 ppm; not specified for CW 4040 SF in supplied sheet
Active Membrane Area
85–400 ft² (7.9–37 m²); BW 400 models: 400 ft² (37 m²); BW 4040 R and CW 4040 SF: 85 ft² (7.9 m²)
Feed Spacer Thickness
28–34 mil; BW 400 models: 34 mil; BW 4040 R and CW 4040 SF: 28 mil
Primary Performance Test Conditions
All models: 25°C (77°F), pH 7, 15% recovery
BW 400 ES L / ES: 2,000 ppm NaCl at 150 psi (10.3 bar), Test Condition A
BW 400 R / R G2: 2,000 ppm NaCl at 225 psi (15.5 bar), Test Condition A
BW 4040 R: 2,000 ppm NaCl at 225 psi (15.5 bar)
CW 4040 SF: 500 ppm NaCl at 100 psi (6.9 bar)
Models
BW 400 ES L, BW 400 ES, BW 400 R, BW 400 R G2, BW 4040 R, CW 4040 SF
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