SWRO 8040 Low-Energy RO Membrane

This 8.0″ × 40″ thin-film composite (TFC) RO membrane is designed for seawater systems that prioritize energy efficiency without compromising stable permeate quality. It is a drop-in replacement for standard 8040 pressure vessels and interconnectors, and includes clear operating limits, cleaning chemistry windows, and preservation guidance for dependable service life.

Key features

• Low-energy design achieves target flux at reduced feed pressure to help lower kWh per m³.
• Typical salt rejection up to 99.5% for dependable product conductivity.
• Balanced feed spacers support stable differential pressure and effective CIP.
• 1.125″ permeate tube ID; drop-in fit for multi-element 8040 vessels and couplers.
• Compatible with energy recovery devices (ERD) and staged SWRO arrays.

Interfaces & compatibility

• Format: 8040 TFC polyamide element
• Permeate tube: 1.125″ (28.6 mm)
• Housings/couplers: standard 8″ pressure vessels with interconnectors
• Change-out: replace like-for-like in most 8040 trains

Operating & cleaning limits*

• Max temperature: 45 °C (113 °F)
• pH range (operation): 2–11; (cleaning): 1–12
• Max pressure: 1,200 psi (8.3 MPa)
• Free chlorine: not recommended on TFC unless explicitly allowed by the datasheet; dechlorinate upstream

*Always verify final limits on the current model datasheet.

Typical test conditions

32,000 mg/L NaCl, 25 °C, reduced operating pressure versus HR types, and ~8% recovery. In service, performance depends on temperature, salinity, recovery, and pretreatment (SDI/MFI, antiscalant window).

What’s included

• Factory-preserved element in sealed bag
• Installation torque notes; cleaning & preservation guidance (download)

For field criteria, see RO membrane replacement, cleaning & CIP, and troubleshooting matrix.