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

Standard dimensions in. (mm)Feed spacer thickness
in. (mm)

Active area
ft² (m²)

TRO 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(D) 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)

TRO(D) 8038N1

0.031 (0.79)

390 (36.2)

TMRO 8040PS

0.031 (0.79)

390 (36.2)

TMRO(D) 8040PS

0.031 (0.79)

390 (36.2)

Model
REVERSE OSMOSIS

Size

ADiameter

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

AC

B
Feed Water

Permeate

Concentrated Brine

TMRO 8040 models (w/ ATD)

Components conform to FDA Regulation CFR Title 21
Flow direction

HIGH-PRESSURE REVERSE OSMOSISTRO 3838HP

0.031 (0.79)

77 (7.2)

TRO 8038HP0.031 (0.79)

390 (36.2)

TRO 8038HPN20.046 (1.17)

312 (29.0)

TMRO 8040HP

0.031 (0.79)

390 (36.2)

Material Specifications

TMRO 8040HPN20.046 (1.17)

312 (29.0)

Feed spacer & element outer wrap

Polypropylene

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

Polysulfone

Permeate carrier

Proprietary

Adhesives

Proprietary

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.

AC

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Product datasheet

OPERATING LIMITSMembrane characteristics

Maximum operating pressure

800 psi (55.2 bar)

Maximum operating temperature

122°F (50°C)

Maximum operating temperature for HPRO

150°F (65°C)*

Maximum cleaning temperature

122°F (50°C)

Acceptable operating pH range

2.5–10.5

TRO-series HP elements are high-rejection.

Acceptable short-term cleaning pH range

1.7–11.5

Applications

Maximum pressure drop per element

15 psi (1.0 bar)

Maximum pressure drop per vessel

60 psi (4.1 bar)

* Please refer to conditioning procedures on pg. 3 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**Free chlorine should not be present in feed

Performance / Test Conditions for High-Pressure RO
Rejection rate

99.8%

Flux rate

17.5 gfd (30 lmh)

Feed water pressure

800 psi (55.2 bar)

Feed water temperature

77°F (25°C)

Feed water concentration

32,000 mg/l as NaCl

Recovery rate

8%

Feed water pH8TRO-series elements are ideal for maximum retention ofvaluable milk solids and COD/BOD contributing compounds.
Toray's 'D-family' polyamide composite membranes
incorporate membrane chemistry that offers extra durability
against foulants and chemical cleaning.

•Milk permeate concentrate•

Sugar concentration•

Flavor concentration•

Aroma concentration•

Wine de-alcoholization•

Beer de-alcoholization•

Diafiltration water

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.

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Reverse Osmosis Membrane
Product datasheet

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

New Toray high-pressure reverse osmosis membrane elements intended
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, nonfouling water. RO permeate is preferred (water from an RO that has been in
operation for at least 24 hours).
Conditioning procedure:
1.

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

2. Recycle warm water 104–113°F (40–45°C) at less than 25 psig (1.7 bar)trans-membrane pressure. The maximum differential pressure is 2 psi
per element or 10 psi per vessel.
3. Introduce hot water to the circulating system to increase temperature to140–150°F (60–65°C).
4. Maintain this temperature and a TMP less than 25 psig (1.7 Bar) for80 minutes.
5. The maximum temperature increase or decrease is 2° C/minute.
6. Allow the circulating system to cool below 113°F (45°C) or below.

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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