TW-34-4021
TW-34-4021 is a brackish-family spiral-wound thin-film composite RO element. Elements in this range undergo vacuum integrity testing and carry serial numbers.
- Element size
- 101.6 × 533.4 mm
- Salt rejection
- 99.5%
- Permeate flow
- 1.987 m³/d (525 GPD)
Tested at 1,500 ppm NaCl, 25 °C (77 °F), 6.9 bar (100 psi), pH 7 (± 0.5), 15% recovery.
Lead time is confirmed with your quote and depends on order size.
- Model
- TW-34-4021
- Segment
- Commercial
- Family
- Brackish
- Element size
- 4" × 21"
- Active area
- 3.3 m² (36 ft²)
- Feed spacer
- 34 mil
- Salt rejection
- 99.5%
- Permeate flow
- 1.987 m³/d (525 GPD)
- Test pressure
- 6.9 bar (100 psi)
- Max temperature
- 45°C
- Maximum operating pressure
- On request
- pH range (operation / cleaning)
- On request
- TDS class
- low
Tested at 1,500 ppm NaCl, 25 °C (77 °F), 6.9 bar (100 psi), pH 7 (± 0.5), 15% recovery.
Other sizes in this family
Cross-referenced models
Cross-references support initial selection. Confirm feed water, operating conditions and system compatibility with Hi-Tech before replacement. Published specifications may use different test conditions.
Application review required unless badged otherwise.
- DuPont (FilmTec) TW30-4021Comparable specifications
- DuPont (FilmTec) BW30-4021
- Koch (Separation Solutions) MW-T421Comparable specifications
- Vontron ULP21-4021Comparable specifications
- Vontron LP21-4021
- CSM (Toray Chemical Korea) RE4021Comparable specifications
- CSM (Toray Chemical Korea) RE4021-BE / TE / TL
Frequently asked questions
What is the salt rejection of TW-34-4021?
TW-34-4021 is listed at 99.5% salt rejection. Tested at 1,500 ppm NaCl, 25 °C (77 °F), 6.9 bar (100 psi), pH 7 (± 0.5), 15% recovery.
What element size is TW-34-4021?
TW-34-4021 is a 4" × 21" spiral-wound RO element (size code 4021). Listed maximum operating temperature is 45°C.
Which models is TW-34-4021 cross-referenced with?
TW-34-4021 is cross-referenced with DuPont (FilmTec) TW30-4021 (Comparable specifications), DuPont (FilmTec) BW30-4021 (Application review required), Koch (Separation Solutions) MW-T421 (Comparable specifications), Vontron ULP21-4021 (Comparable specifications), Vontron LP21-4021 (Application review required), CSM (Toray Chemical Korea) RE4021 (Comparable specifications) and others. Cross-references support initial selection. Confirm feed water, operating conditions and system compatibility with Hi-Tech before replacement. Published specifications may use different test conditions.