TW30-4021

Summary

Product identification

FilmTec™ Reverse Osmosis (RO) Elements offer high-quality water for small commercial systems purifying less than 0.2 m³/d (one gallon per minute) of RO water. They are available in various sizes and provide reliable performance. FilmTec™ XLE extra low energy elements operate at lower pressures to reduce energy costs.

This document specifically details the FilmTec™ TW30-4021 element.

Performance

• Product: TW30-4021
• Part Number: 80608
• Applied Pressure: 225 psig (15.5 bar)
• Permeate Flow Rate: 900 gpd (3.41 m³/d)
• Stabilized Salt Rejection: 99.5%

Test Conditions for TW30 elements:

• Feed stream: 2,000 ppm NaCl
• Temperature: 77°F (25°C)
• Recovery rate (for TW30-4021): 8%
• Note: Permeate flows for individual elements may vary +/-20%.

Operating limits

• Membrane Type: Polyamide Thin-Film Composite
• Maximum Operating Temperature: 113°F (45°C)
  • Note: Maximum temperature for continuous operation above pH 10 is 95°F (35°C).
• Maximum Operating Pressure: 600 psig (41 bar)
• Maximum Pressure Drop (per element): 13 psig (0.9 bar)
• pH Range - Continuous Operation: 2 - 11
• pH Range - Short-Term Cleaning (30 min.): 1 - 13
• Maximum Feed Silt Density Index (SDI): 5
• Free Chlorine Tolerance: <0.1 ppm
  • Note: Presence of free chlorine and other oxidizing agents will cause premature membrane failure. Pretreatment to remove residual free chlorine is recommended.

Mechanical / hydraulic

• Maximum Feed Flow Rate: 14 gpm (3.2 m³/h)
• Element Dimensions (inches (mm)):
  • A: 21.0 (533)
  • B: 1.05 (27)
  • C: 0.75 (19)
  • D: 3.9 (99)
• Pressure Vessel Compatibility: Fits nominal 4 inch I.D. pressure vessels.
• Maximum Pressure Drop across an entire pressure vessel (housing): 30 psi (2.1 bar).

General Information

• Keep elements moist at all times after initial wetting.
• For prolonged system shutdowns, immerse membrane elements in a preservative solution to prevent biological growth.
• Avoid abrupt pressure or cross-flow variations during start-up, shutdown, or cleaning.
• During start-up, increase feed pressure gradually over 30-60 seconds and achieve set cross-flow velocity gradually over 15-20 seconds.
• Avoid static permeate-side backpressure at all times.
• Discard permeate obtained from the first hour of operation.
• The removal of cysts and pathogens is dependent on the complete system design and proper operation and maintenance.

---

Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet