Product datasheet

Reverse Osmosis Membrane
Sanitary element for dairy and food processing
Toray's sanitary reverse osmosis (TRO-series and TMRO-series) products are high-rejection
fully cross-linked aromatic polyamide composite membrane in a sanitary net wrap design.

Product Speciﬁcations
ModelStandard dimensions in. (mm)Feed spacer thickness
in. (mm)

Active area
ft² (m²)

REVERSE OSMOSISTRO 3838N1

0.031 (0.79)

77 (7.2)

TRO 3838N2

0.046 (1.17)

60 (5.6)

TRO 3838N3

0.065 (1.65)

46 (4.3)

TRO 3839N1

0.031 (0.79)

77 (7.2)

TRO 7838N1

0.031 (0.79)

380 (35.3)

TRO 7838N2

0.046 (1.17)

310 (28.8)

TRO 8038N1

0.031 (0.79)

390 (36.2)

TRO 8038N2

0.046 (1.17)

320 (29.7)

TRO 8038N3

0.065 (1.65)

240 (22.3)

TMRO 8040PS

0.031 (0.79)

390 (36.2)

SizeA
Diameter

B
LengthC
Permeate tube ID

3838

3.8 (97)38 (965)

0.83 (21.1)3839

3.8 (97)38.75 (984)0.83 (21.1)

7838

7.7 (196)

38 (965)

1.125 (28.6)8038

7.9 (201)

38 (965)

1.125 (28.6)8040

7.9 (201)40 (1,016)

1.125 (28.6)

Spiral Elements in Sanitary Design (no ATD)
Components conform to FDA Regulation CFR Title 21 andUSDA/3A Sanitary Standards
Flow direction

CA

B

HIGH-PRESSURE REVERSE OSMOSISTRO 3838HP

0.031 (0.79)

77 (7.2)

TRO 8038HP

0.031 (0.79)

390 (36.2)

TRO 8038HPN2

0.046 (1.17)

312 (29.0)

TMRO 8040HP

0.031 (0.79)

390 (36.2)

TMRO 8040HPN2

0.046 (1.17)

312 (29.0)

If you do not see a configuration or performance requirement that meets yourneeds, a team of product specialists is ready to develop custom engineeredsolutions. Please inquire within.

TMRO 8040 models (w/ ATD)
Components conform to FDA Regulation CFR Title 21CA

B

Material Speciﬁcations
Feed spacer & element outer wrap

Polypropylene

Permeate tubes, Anti-telescoping device (ATD),
inter-connectors for TMNF models

Polysulfone

Permeate carrier

Proprietary

Adhesives

Proprietary

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Product datasheet
Applications

OPERATING LIMITS
Maximum operating pressure

800 psi (55.2 bar)

•Milk permeate concentrate

Maximum operating temperature

122°F (50°C)•Sugar concentration

Maximum operating temperature for HPRO

150°F (65°C)*•

Flavor concentration•

Aroma concentration

Maximum cleaning temperature

122°F (50°C)•Wine de-alcoholization

Acceptable operating pH range

2.5–10.5•

Beer de-alcoholization

Acceptable short-term cleaning pH range

1.7–11.5•Diaﬁltration water

Maximum pressure drop per element

15 psi (1.0 bar)

Conditioning procedure for TRO-series HP elements
when operating above 50°C

Maximum pressure drop per vessel

60 psi (4.1 bar)

New Toray high-pressure reverse osmosis membrane elementsintended for operation at temperatures above 122°F (50°C) must
be pre-conditioned before initial use by exposure to hot water at
low pressure. Conditioning water must be high-quality chlorine
and oxidant free, non-scaling, non-fouling water. RO permeate
is preferred (water from an RO that has been in operation for atleast 24 hours).
Conditioning procedure:* Please refer to conditioning procedures on pg. 2 of this document
Consult Toray for pressure limits when operating above ambient temperature

OXIDANT TOLERANCE
Chlorine tolerance (short-term cleaning at pH 11)

Non-detect

H₂O₂ continuous ppm

20*

H₂O₂ short-term cleaning <77°F (25°C) ppm

1,000*

1.

*Free chlorine should not be present in feed

Membrane characteristics

2. Recycle warm water 104–113°F (40–45°C) at less than
25 psi (1.7 bar) trans-membrane pressure. The maximum
differential pressure is 2 psi (0.13 bar) per element or 10 psi(0.69 bar) per vessel.

TRO-series elements are ideal for maximum retention ofvaluable milk solids and COD/BOD contributing compounds.
TRO-series HP elements are high-rejection.

3. Introduce hot water to the circulating system to increase
temperature to 140–150°F (60–65°C).

Regulatory Information

Toray's membrane elements are certiﬁed under:•ISO 9001:2015 QMS to ensure consistency in product andservice quality; and•ISO 14001:2015 EMS to enhance the environmental
performance of our products and services.

Flush water to drain with a non-scaling water at low
pressure, maintaining low permeate rates.

4. Maintain this temperature and a TMP less than 25 psi (1.7bar) for 80 minutes.
5. The maximum temperature increase or decrease is 2° C/(3.6° F) minute.
6. Allow the circulating system to cool below 113°F (45°C) orbelow.

NOTICE
1.

Elements are preserved in sodium meta-bisulﬁte. Appropriate personal
protective equipment should be worn when handling.

2.

Toray accepts no responsibility for results obtained by the application of thisinformation or the safety or suitability of Toray's products, either alone or incombination with other products. Users are advised to make their own tests

to determine the safety and suitability of each product combination for theirown purposes.
3.

All data may change without prior notice, due to technical modiﬁcations orproduction changes.

4.

Consult Toray for element sizes not shown.

TORAY MEMBRANE USA, INC. 13435 Danielson Street, Poway, CA 92064, U.S.A. Tel: +1 (858) 218 2360

innovation@toraymem.com

TORAY MEMBRANE EUROPE AG Grabenackerstrasse 8b, Muenchenstein 1 CH-4142, Switzerland Tel: +41-61-415-8710 info.tmeu.mb@mail.toray

www.water.toray/products/specialty

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