TORAY REVERSE OSMOSIS MEMBRANE ELEMENTS are functional membrane elements with excellent quality and high performance developed with the polymer engineering expertise Toray has gained over the years. Toray Reverse Osmosis Membrane Elements are high rejection and high flux RO elements that have been meeting the high level requirements of our customers in many applications: ultrapure water production for semiconductor and other industries; seawater desalination; wastewater treatment; the recovery of valuable process materials in the food processing industry, etc. The wide-ranging line of products was first marketed in 1978.
Toray membrane products are manufactured in three locations allowing for convenient global distribution. Toray’s manufacturing plants in Ehime Japan, TBMC in China, and TMUS in US are all certified for both ISO9001 and ISO14001. Also, TMUS plant has achieved the National Sanitation Foundation (NSF) certified for their low-pressure brackish products.

ISO 9001ISO 14001

Toray manufactures RO elements using second-generation automated rolling equipment developed by Toray Industries. The automatic winding of spiral wound elements provides a more durable, higher membrane surface area product versus traditional hand rolled elements. The RO elements manufactured are dimensionally compatible with all major membrane manufacturers providing easy upgrade and retrofit opportunities. The high quality (high rejection, high flow characteristics) of Toray's products make them ideally suited for use in applications such as municipal drinking water, seawater desalination and the production of ultra pure water for the semiconductor and power industries.

Toray RO Element Design

Toray manufactures two different membrane product lines: cross-linked polyamide composite membranes (TM and SU series) and asymmetrical cellulose acetate membranes (SC series).

TM Element series

The TM series of elements uses the close-coupled design (interior interconnector), which is the industry standard. This design allows for greater membrane surface area to be incorporated into the element, which leads to higher productivity and/or reduced operating pressures.

SU 4” and8” Membranes TM 4” and 8” Membranes
SU 4” and8” Membranes TM 4” and 8” Membranes
(8 inches)
20cm 10cm
Each element is 1,016mm (40 inches) in length.
Cross-section of TM-Series and SU-Series Membrane
Salt rejecting layer

Supporting layer
Basic fabric

SC Element series

  • Spiral wound reverse osmosis elements which employ asymmetrical cellulose acetate membrane.
  • Stable performance and dependability are proven in a wide range of applications since first marketed in 1978.
  • Due to the non-charged membrane and unique element configuration, pretreatment can be carried out easily and fouling tendencies are reduced
  • The membranes can be used in a continuous chlorine sterilization process

SC-Series Element

(4 inches)
(8 inches)
Each element is 1,016mm (40 inches) in length.
Cross-section of SC-Series Membrane
Fine layer (Salt rejecting
layer,<1µm) Porous layer

Supporting layer,
Basic fabric

Features and Quality of Toray Reverse Osmosis Membrane Elements

  • High rejection and high flux membrane
    Both high rejection and high flux membranes are developed with Toray's extensive experience in polymer chemistry.
  • Choice in membrane material
    Two types of membrane materials are available: thin film composite (TM and SU series) and cellulose acetate (SC series). Both membrane types are manufactured by Toray for use in a wide range of water treatment applications.
  • Used in many applications
    With such a broad range of products, such as high salt rejection or ultra-low pressure elements, the optimum element can be selected for any application ranging from ultrapure process water to seawater desalination.
  • Experience
    Toray was the first manufacturer of reverse osmosis membrane elements in Japan and has 25 years of experience in the application of numerous processes around the globe.
  • Complete service and support
    Toray has established a complete service system to assist customers based on our extensive experience and technical data accumulated through many years and a variety of applications. Should any problem occur, appropriate technical support is readily available worldwide.
  • Stable quality guaranteed
    Toray elements are manufactured under rigorous quality control procedures. Toray's Japanese membrane manufacturing factory has ISO-9001 and ISO 14001 certification from the Japan Quality Assurance Organization. Our U.S. manufacturing facility has received NSF inspection and certification on a number of products manufactured there.
ISO 9001ISO 14001