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Toray TM720D-440 Brackish Water Reverse Osmosis Membrane Element, 8" x 40"


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Product Code: TM720D-440

Description Spec Sheet / Manual Technical Specifications

Toray Reverse Osmosis Elements

(Suggested alternative: Filmtec BW30HR-440i)

TORAY first began producing Reverse Osmosis and Nanofiltration spiral wound membrane elements in 1967, starting With cellulose acetate membrane elements. Today, their product line includes a full range of state-of-the-art cross-linked polyamide composite membranes manufactured under ISO-9001 certification.


  • Cross-linked fully aromatic polyamide composite membrane
  • Cross-linked polypiperazine polyamide composite membrane
  • Cellulose acetate membrane


  • High rejection TM700 series, for high salinity brackish water applications
  • Ultra low pressure TMH and TMG series for low salinity brackish water applications
  • High rejection TM800 series, for sea water applications
  • High pressure & rejection TM800H series, for high salinity sea water applications
  • Commercial & household 2" to 4" tap water elements


More than 30 years of production experience, thousands of high-performing RO plants throughout the world are the foundation of the excellent reputation that TORAY membrane products have.

Toray offers most of its standard 8" elements with a new flush cut design. The anti-telescoping device (ATD) on new TM elements provides improved face-to-face contact for hydraulic loading, providing more uniform distribution of the loads.

These new flush-cut elements are fully compatible with many other elements in the industry. With its new flush-cut elements, Toray has set its sights on how internal sealing is done, thus ensuring the highest degree of integral sealing between elements within the pressure vessel.

Operating Limits

Maximum Operating Pressure600psi (4.1 MPa)
Maximum Feed Water Temperature113°F (45℃)
Maximum Feed Water SDI155
Feed Water Chlorine Concentration<0.1ppm
Feed Water pH Range, Continuous Operation2 - 11
Feed Water pH Range, Chemical Cleaning1 - 13
Maximum Pressure Drop per Element15 psi (0.10 MPa)
Maximum Pressure Drop per Vessel50 psi (0.34 MPa)

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