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NoticeThe data and information contained in this document are based upon rigorous technicaltesting by Toray, and is to the best of our knowledge reliable. Toray cannot control designand operating conditions, and consequently Toray does not assume any liability for results
obtained or damage incurred through the application of the information provided herein.
No liability, warranty or guarantee of final product performance by Toray is implied by the
information provided in this document.
This manual supersedes all previous versions. Technical modification of products or
production technology may necessitate changes to information in this manual without priornotice. Please verify that your version of the manual is the latest version available by either
contacting Toray, or checking online at www.water.toray.

Terms and Conditions of Use
When using this document, please read the Terms and Conditions of Use below thoroughly and agree to them before using
this document. By using this document, you agree to all of the Terms and Conditions of Use outlined here. The Terms andConditions of Use are subject to change without prior notice, so please check with Toray for the latest Terms and Conditionsof Use before using the document.
1.

Intellectual Property Rights
The content in this document is protected by copyright laws in respective countries and relevant treaties. Accordingly,
the document's information may not be reproduced, altered, or distributed without permission in writing from Toray. We
permit downloading this document through Toray's website as a PDF file, stored on a personal computer, and printed
out for customers' personal use. However, we prohibit transferring this document to any other websites or printed media.
The material contained in this document may not be used without permission from the copyright holder for any otherpurpose that exceeds the scope permitted under copyright law.

2.

Trademarks
The "TORAY" company name used in this document is a trade name, and the names of products manufactured by
Toray are trademarks or registered trademarks. Toray's trade names and trademarks are protected under the JapaneseTrademark Law, the Unfair Competition Prevention Law, and other legislation. The trade name and trademarks may not
be used or reproduced without express permission from Toray.

3.

Disclaimer
Toray takes all reasonable care in updating the information in this document. However, Toray makes no representation
and warranty of any kind, either express or implied, including without limitation, any implied warranties concerning theaccuracy, usefulness, suitability, or fitness for a particular purpose of the information in the document.
Toray shall not be responsible or liable for any losses or damage incurred due to the use of the information in thisdocument. The information in this document is subject to change without prior notice, and Toray reserves the right tosuspend or discontinue the publication of this document.

4.

Availability of Goods and Services
The goods and services contained in this document are not available in all countries and regions. Goods and services
may also be supplied under different trademarks in different countries. We ask that you contact your nearest Toray
representative office if you wish to use the goods and services shown or implied in this document.

5.

Proper Law and Court of Jurisdiction
This Terms and Conditions of Use shall be governed by and construed according to the laws of Japan. Any and all
disputes arising out of or relating to this document shall be brought to the Tokyo District Court Tokyo, Japan.

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Contact Information
Toray Industries, Inc. — UF & MBR Membrane Products Department (Global Headquarters)
Nihonbashi Mitsui Tower, 1-1, Nihonbashi-Muromachi 2 chome, Chuo-ku, Tokyo, 103-8666
Japan
Tel: +81-3-3245-4542 Fax: +81-3-3245-4913
Toray Membrane USA, Inc. (TMUS)
13435 Danielson Street, Poway, California 92064 USA
Tel: +1-858-218-2360 Fax: +1-858-218-2380
Toray Membrane Europe AG (TMEU)
Grabenackerstrasse 8b, Muenchenstein 1 CH-4142, Switzerland
Tel: +41-61-415-8710 Fax: +41-61-415-8720 E-mail: info.tmeu.mb@mail.toray
Toray Asia Pte. Ltd. (TAS)111 Somerset Road, #14-22 - #14-27, Singapore 238164, Republic of Singapore
Tel: +65-6226-0525 Fax: +65-6226-0509
Toray BlueStar Membrane Co., Ltd. (TBMC)
Zone B, Tianzhu Airport Industrial Zone, Beijing 101318, China
Tel: +86-10-8048-5216 Fax: +86-10-8048-5217
Toray Membrane Middle East LLC (TMME)
3515, 3rd Industrial City, 8682, Dammam, 34857, Kingdom of Saudi Arabia
Tel: +966-13-568-0091 Fax: +966-13-568-0093
Toray Advanced Materials Korea Inc. (TAK)
Korea Toray R&D Center 7, Magokdonng-ro 10-gil, Gangseo-gu, Seoul 07790, Republic of
Korea
Tel: +82-22-3279-7389 Fax: +82-2-3279-7088

website: www.water.toray

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TABLE OF CONTENTS
I.

Introduction
1.

Characteristics of Toray "HFUG series" Membrane Modules ・・・・・・・・・・・・・・・ 1

2.

About “type HN”

3.

Applications of Toray "HFUG-2020HN" Membrane Module ・・・・・・・・・・・・・・・・ 2

4.

Toray UF TUF Rack <Rack-Integrated Toray UF> ・・・・・・・・・・・・・・・・・・・・・・ 2

II.

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 2

For Your Safety

1.

Safety Instruction for Unpacking and Installation ・・・・・・・・・・・・・・・・・・・・・・ 42.

Safety Instruction for Filtration Operation ・・・・・・・・・・・・・・・・・・・・・・・・・・ 6

3.

Safety Instruction for Chemical Cleaning

4.

Safety Instruction for Disposal ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 9

5.

Warranty Claims ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 10

6.

Warranty Policy ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 11

III.

Specifications of Toray "HFUG-2020HN" for TUF Rack series ・・・・・・・・・ 12IV.

Configuration of Toray "HFUG-2020HN" Membrane Module

・・・・・・・・・・・・・・・・・・・・・・・・・・ 8

1.

Configuration of Toray "Type HN" Membrane Module ・・・・・・・・・・・・・・・・・・ 15

2.

Configuration of “Toray UF TUF Rack” ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 16

3.

Shipping and Handling ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 20

V.

Installation

1.

Assembly and Maintenance ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 21

2.

Disassembly and Disposal ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 48

VI.

Operation

1.

Filtration ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 49

2.

Backwash and Air-scrubbing ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 51

3.

Toray Maintenance Cleaning ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 55

4.

Basic Trans-Membrane Pressure Calculation

5.

Temperature Correction Factor

6.

Performance Recording ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 60

VII.

Chemical Cleaning ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 61

VIII.

Storage of Membrane Module

・・・・・・・・・・・・・・・・・・・・・・・ 58

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 59

1.

Storage of New Membrane Modules ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 65

2.

Storage of Membrane Modules and Racks after Use ・・・・・・・・・・・・・・・・・・・・ 65

3.

Replace Preservative Solution

IX.

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 66

Appendix ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 67

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I. Introduction
Toray PVDF Hollow Fiber Membrane Module "HFUG-2020HN " is a pressurized hollow
fiber UF (Ultra Filtration) membrane module developed with polymer science andmembrane fabrication technologies accumulated over decades of successful membrane
manufacturing at Toray Industries, Inc.
The membrane material is Polyvinylidene fluoride (PVDF). The nominal pore size of themembrane is 0.01 micrometers.
The module, which is permanently potted in its casing, is pressure-driven, providing
filtrate quality equal to that of submerged modules while allowing for a wider range oftransmembrane pressure (TMP) for more flexible plant operation. The maximum operatingpressure is 600 kPa (87.0 psi). The flow direction is outside-in, which is more suitable forhigher turbidity water treatment because of the air-scrubbing effectiveness. Additionally,outside-in modules can remove suspended solids more effectively at higher recovery rates
compared to inside-out fibers.
1. Characteristics of Toray "HFUG series" Membrane Modules(1) High Filtration FluxHFUG series provides high filtration flux and stable operation for the filtration of various
raw water sources. The membrane is made with a special spinning method, whichenables high permeability and high fouling resistance.
(2) Excellent Water Quality
HFUG series provides very good water quality for the filtrate, extremely low turbidity
since the membrane has a nominal pore size of 0.01 micrometers. HFUG series
is recommended to be applied to the tertiary treatment of sewage water and RO
pretreatment in desalination.
(3) High Mechanical Strength
The membrane of HFUG series has very high mechanical strength because it is madeof PVDF with the special spinning method developed by Toray. HFUG series provides
high integrity and durability under recommended operating conditions.
(4) High Chemical Durability
The membrane material of HFUG series is PVDF, which allows to clean the membranewith high concentrations of chlorine and with high concentrations of acid resulting in
better cleaning and longer sustainable membrane flux rates.
2. About “type HN”“Type HN” is a module type which allows high pressure (600 kPa) operation, whose
housing is sealed with an improved cap. All connecting parts of "Type HN" modules are
optimized to allow operation under the high pressure.
3. Applications of Toray "HFUG-2020HN" Membrane Module•
Tertiary Treatment•
RO Pretreatment•
Industrial Water Production•
Reuse of Industrial Wastewater
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4. Toray UF TUF Rack <Rack-Integrated Toray UF>
Pre-engineered, standardized rack design specialized for Toray UF modules tosignificantly reduce engineering design and installation costs.
•
Highly reliable Toray UF membrane•
The same operation procedure as the Toray UF module•
Compact piping arrangement, which saves engineering and reduces installation
footprint•

Shipped unassembled for easy transportation and lower shipment cost

II. For Your Safety•

Please be sure to read and follow the instructions below before using HFUG-2020HN.
This manual should be retained for future reference.

•

Follow the safety precautions as they are intended to protect operators and equipmentfrom various risks such as physical harm and/or property damage. The following tableshows a level of potential risk for each indicated symbol.

•

The following table explains the information to be noted

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1. Safety Instruction for Unpacking and Installation

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2. Safety Instruction for Filtration Operation

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3. Safety Instruction for Chemical Cleaning

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4. Safety Instruction for Disposal

5. Warranty Claims
UF rack shall be delivered as parts in dismantled condition.
UF modules and UF rack parts that are damaged due to improper loading, shipping,handling, or storing shall not be covered by Toray Industries, Inc.’s warranty. Therefore,
it is very important that the customer firmly follows the instructions of loading, shipping,handling, and storing of the UF modules mentioned in this Instruction Manual.
UF modules which are in their original sealed package can be stored for 12 months fromthe date they were shipped from Toray’s factory or warehouse. If they are stored for longer
than 12 months, the warranty will become void unless otherwise Toray Industries, Inc.
agrees.
Toray Industries, Inc. shall only warrant the quality of UF rack parts, not assembled UF
rack, thus the customer firmly follows procedures of UF rack assembly mentioned in thisInstruction Manual under customer's responsibility. Any UF rack troubles such as leakage,
distortion, collapsing, parts damages, or unbalanced water and/or chemical distribution
in the UF rack due to improper assembly shall not be covered by Toray Industries, Inc.'s
warranty.
6. Warranty Policy
Full and proper compliance with this Instruction Manual is a mandatory required thing
for the claims under the warranty. In case of making a warranty claim, the customer
automatically agrees to provide Toray Industries, Inc. with the information about operationmode, recording performance data of UF systems.
Kindly please contact Toray Industries, Inc. if the customer wishes to deviate from any ofthe procedures or specifications mentioned in this Instruction Manual and request written
approval in advance. Otherwise, the customer has a risk of invalidation for any warranty
claims that they may make in the future.

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III. Specifications of Toray "HFUG-2020HN" for TUF Rack series

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IV. Configuration of Toray "HFUG-2020HN" Membrane Module
1. Configuration of Toray "Type HN" Membrane Module

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2. Configuration of “Toray UF TUF Rack”

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Fig. 2. “Toray UF TUF Rack” Modules and Components

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3. Shipping and Handling(1) UF Modules Package
One UF Modules Package contains 10 modules. The UF Modules Package is the 		
following size and weight.
Package for UF Modules: L 2,270 mm * D 1,190 mm * H 1,230 mm,
				approximately 630 kg/box
The UF Modules Package can be stacked up to two tiers, and they should be stored in acool place out of direct sunlight and avoid freezing or getting wet.
(2) Rack Parts Package
A package for Rack Parts is described in the Parts List (see Table 7).
Rack Parts Package Type 1: L 2,170 mm * D 1,080 mm * H 520 mm,
approximately
230 kg/box
The Rack Parts Package can be stacked up to five tiers, and they should be stored ina cool place out of direct sunlight and avoid freezing or getting wet in the same way as
the UF Modules Package.
The size and weight of the Rack Parts Package above is for 24 modules. The numberof parts and the weight of the Package will be changed as the number of modules ischanged. If the rack is not a 24-module rack, please contact us regarding the package.

V. Installation
1. Assembly and Maintenance
Always operate with a calculated number of workers when a module needs to be liftedand placed on a Base Channel. The customer needs to determine the required numberof workers in accordance with the situation. Toray recommends workers who are capableof properly handling heavy objects and have experience in assembly work under the local
regulations and rules.
In this manual, the lifting work was operated by four workers. For setting up each module,
more than two workers are required. One must hold the module vertical while the others
fix the module to a Base Channel.
Also, the water supply side is described as the Flange Conversion side, and the end of
the rack is described as the End Header side (see Fig. 2, p.17). The numbering of themodules begins with the left module on the Flange Conversion Side, and the number
increases from left to right and from the Flange Conversion Side to the End Header Side.

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Toray UF(1) Recommendation Tools List

In addition to the above list, tap water or equivalent quality water is required toprevent the hollow fiber membrane from drying out, which is used for filling into assemblyrack and UF modules from feed water side such as upper side nozzle of UF module.

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Toray UF(2) Rack Assembly
The standard method to assemble the rack with a total of 24 modules in 2 rows andinstall the membrane modules is described below.
		*[ ]: Parts List No. described in Table 7.

		1. Unpack the membrane module and rack parts from package boxes.
		

2. Check the quantities of UF modules and rack parts with the list provided. Inspect
the UF module and rack components for any defects or damages. Contact Toray
officials if you find any mismatches in the number of the module and parts, defects,
or damages.

		3. Secure a work area to assemble Base Channels [1]. Take four pairs of Base 		
Channel components out from the package boxes and put the components on thefloor. Ensure to install the Base Channel horizontally on the floor. When installing theBase Channel, a Flange position of the piping side connecting to the Rack is correct.

		
4. Connect Base Channel 6MD-R		[1] (1-1 and 1-2 (1), 2-1 and 2-2 (2))
		with Base Channel Connectors [2],		
M16 Hexagon Bolt Sets [3]. The Base		
Channel Connector needs to be		
screwed on the outside of Base Channel.
				

Repeat this step for the Base Channel
6MD-L (3-1 and 3-2 (3), 4-1 and 4-2 (4)).

		5. Assemble the Base Channel 6MD-R (1)		
and (2) with the Base Channel Stick-S[4],		and also assemble the Base Channel
		
6MD-L (3) and (4).
				Connect the Base Channel 6MD-R and
6MD-L with the Base Channel Stick-L [5].

		
		
		
		

When the assembling of the Base
Channels is completed, check thehorizontality of the Base Channels at
all the positions with a spirit level.

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6. Set the assembled Base Channel at the planned
position, and mark drill hole positions for Anchor
Bolts. To check the installation position more
precisely, place a bottom header with a Flange
temporarily on the Base Channel, and make sure
it can be connected to the Flange of the feed pipe
to which it will be connected.
To avoid defects or damages caused by drilling
holes, put the assembled Base Channel aside.
7. Drill holes for the anchors on the floor. During drilling, prevent any defects or damages
to the assembled Base Channel. Clean off any debris caused by the drilling operation
to keep the floor level. Restore the assembled Base Channel to its planned position.
8. Using a spirit level, check the horizontality of theBase Channels at all the positions. Adjust or
clean the floor if the spirit level is not horizontal,
then set the assembled Base Channel andcheck the horizontality again.

9. Secure the Base Channel on the floor with theAnchor Bolts [6]. Check the level of the Base
Channel after the Anchor Bolts are installed
and ensure there is no gap between the Base
Channel and the floor. If there is a gap between
the Base Channel and the floor, use shims or
stiffeners to fill the gap.
In case of using Chemical Anchor, leave enoughtime for the Chemical to harden before working
with it. It is recommended that the Chemical
Anchor work be done the day before module
installation.

10. Take UF modules and partition frames out fromthe UF package box. Place the partition frame on
the floor and put the UF module [7-10] on it.
Two or more workers are required.

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11. Set a bucket to receive the preservative solution
and remove a plugging plate of the upper side
nozzle. Be cautious of preservative solution
which comes out when the plate is opened.
Turn the module nozzle down and remove thepreservative solution.

Remove the top cap and bottom cap. Keep theremoved V-band for Module, O-ring [8, 9], andHousing Joint 65A [10] as they will be used again
when assembling a rack. The removed caps are
not required to assemble racks.

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12. Place Header-1#1 [11] and Header-1#2 [12] toeach end of the module. Air injection is attachedto the Header-1#2, but not to the top header.
Make sure that the O-ring [9] between themodule and the header fits correctly.
Adjust the header direction so that the module
edge protrusion and the header circle mark a,b)
are aligned.
		a) Header-1#1 (Top Header): use the rightcircle mark.

		b) Header-1#2 (Bottom Header): use the left
circle mark.

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13. Cover with a pair of the V-band half-shells
for Module [8] which is described in step 11
so that the protrusion and the circle mark arevisible through the V-band window and tighten
the V-band. Make sure the bolts are securely
fastened to prevent leaks. When tightening the
V-band, the bolt sets must be fastened until thegap between the ends of each V-band half-shellreaches below 2 mm.

14. If the V-band gap does not reach 2 mm or less,remove the V-band and check for failure.
Repeat the steps 10 to 14 for all modules for
the Rack. This work can be done in advanceas these steps might be bottlenecked duringassembly.

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15.To connect to the pipes, attach Flange Conversions
to the four headers (the top and bottom headers)of two modules of the rack.
Using the Housing Joint DN150 with gasket [15],attach a Flange Conversion [16] to each headerof one module (Module #1).
One worker holds the Flange Conversion while
the other worker tightens the Housing Joint
DN150.

16. Repeat the step 15 for another module. (Module#2)*Note that the header opening attached to theFlange Conversion is symmetrical with Module#1.
17. Put Module #1 vertically on the Base Channel
with its side nozzle facing the inside of the rack.
Be cautious of preservative solution which comes

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18. Position Module #1 so that three edges of the
Header-1#2 (Bottom Header) are aligned withthose of the Base Channel (See the yellow linein the right figure).
Place a spirit level tool along the module andmake sure the module is installed in verticaldirection (see the step 21).

19. Place the four holes in the Header-1#2 over theholes in the Base Channel and fix the Header-1#2(Bottom Header) with the M12 X 55 mm bolt set[17].

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20. Using the Housing Joint 65A [10] described in
the step 11, attach the Long Elbow [18] to theupper side nozzle of the module so that the longpipe of the Long Elbow points vertically upwards.

21. Place a spirit level tool along the long pipe of theLong Elbow and make sure the Long Elbow is
installed in vertical direction at least at two sides.

22. Insert the Air Tube [19] to the Header-1#2(Bottom Header) of Module #1.

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23. Attach the gaskets for the top and bottom
headers in the Housing Joints DN150 [15] to the
opening of each header of Module #1.

24. Repeat the steps 17 to 23 to install Module #2
on the Base Channel opposite to Module #1 with
its side nozzles facing Module #1 and attach theLong Elbow.
At least three workers are required for this step.

25. Move and prepare another module (Module #3)
assembled in the step 14 near the rack, put themodule vertically on the Base Channel as thestep 17. Repeat the steps 18 to 23.

26. Connect the Headers of Modules #1 and #3 with
the Housing Joint DN150 [15] which corresponds
to the gasket described in the step 23.

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27.Repeat the steps 17 to 26 continuously to install
the module next to the installed module thatstarts from Module #2, to attach the Long Elbow,
and to connect the adjacent Headers.
On the way to these steps, install Central
Fixtures [20].

28. Install Central Fixture [20] so that it holds the twomodule housings described below (24-module
rack for instance).
		-Modules #1 and #2

		-Modules #7 and #8

		-Modules #15 and #16

		-Modules #23 and #24

Push the Central Fixture down to the position
where module housing doesn’t move.
If the rack is not a 24-module rack, pleasecontact us regarding the positions of the Central
Fixtures.

29. Repeat the steps 11 to 28 for the remaining
modules of the rack except for two modules towhich End Headers [13,14] will be attached.
Regarding the two modules, attach top End
Header [13] and bottom End Header [14].
(Module #E1, Module #E2)
*Note that there are two types of bottom End
Headers, R-side and L-side, and attach them toeach module.

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30. The mounting positions of the Flat Bars [21], the Bolts [22], and the Manifold Base[23] are shown in the drawing below. The Flat Bars and the Manifold Base should
be fixed in the following order:
1) Placing and fastening the Flat Bars at the outer sides (1-1, 1-2, 4-1 and 4-2).
Both ends of the Flat Bar are fastened with bolts.
2) Placing the Flat Bars at the inner sides and the Manifold Base. The Manifold Baseis positioned to support both ends of the Manifold.
3) Fastening the Flat Bar at the inner sides and the Manifold BaseIf the rack is not a 24-module rack, please contact us regarding the positions of the
Manifold Bases.
* To install the Flat Bars, it is required to access from both sides of the rack. Place
Flat Bars 1-1, 1-2, 4-1 and 4-2 [21] on the outside of the Header-1#1 (Top Header)and fix them with the M12 X 55 mm Bolt Sets [22].

31. Place Flat Bars 2-1, 2-2, 3-1, and 3-2 [21] on theinside row of the Header-1#1 (Top Header) andplace the Manifold Base [23] on the Flat Bar. If
the Flat Bar length is different, place the shorter
Bar on the Flange Conversion side. The lengthof the inner row Flat Bar will be the same as thelength of the outer row Flat Bar. Assemble theFlat Bars and Manifold Bases to Header-1#1[11] with the M12 X 55 mm Bolt Sets [22]. Screw
the bolts through the holes of Manifold Base,
Flat Bar, and the Header-1#1 (Top Header) [11].
Tighten the bolt at the end of the Flat Bar first(along with the Manifold Base) and tighten theremaining bolts.

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32. Assemble the manifold for the Flange Conversion
side. Wet the O-ring with clean water. Using
the O-rings [24] and the V-bands for Manifold[25], attach the Flange Conversion [26] to the
Manifold [27]. Make sure the bolts are securely
fastened to prevent leaks. Tighten the V-bands
until the gap between the ends of the V-bands is
2 mm. Use a 2 mm shim plate to check the gap.
If the V-band gap does not reach 2 mm or less,remove the V-band and check for failure.

33. Assemble the manifold for the End Header
side. Wet the O-ring with clean water. Using the
O-ring [24] and the V-bands for Manifold [25],attach the Manifold Stopper [28] to the Manifold[27]. Make sure the bolts are securely fastened
to prevent leaks. Tighten the V-bands until thegap between the ends of the V-bands is 2 mm.
Use a 2 mm shim plate to check the gap. If
the V-band gap does not reach 2 mm or less,remove the V-band and check for failure.
*Cover the last end Manifold with the Manifold
Stopper.

34. Place the Manifold with the Flange Conversion
described in the step 29 on the Manifold Base.
Insert the gaskets for Housing Joints 65A [29]to each Manifold hole so that the edge of each
Manifold piping is visible.
The gaskets for Housing Joints 65A [29] can beinserted at this step or at the step 32 or 33.

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35. Reposition the Manifold so that the Long Elbow
and Manifold pipe are in close proximity. In all
piping, ensure that the distance between thecenter line of the Manifold pipe and the centerline of the Long Elbow pipe is less than 6 mm.
Then, shift the gasket to cover the Long Elbow
and the Manifold.
If this distance is over 6 mm, check the following
steps and positions.
1) Level of the Base Channel (refer to the step
8).
2) Alignment of the header marks with themodule protrusion (refer to the step 14).
3) Alignment of the edge of the headers with theedge of the Base Channel (refer to the step
18).
4) Vertical mounting of the Long Elbow (refer tothe step 20 and 21).

36. Connect the Long Elbow and the Manifold with
the Housing Joint 65A [29].

37. Place another Manifold on the adjacent Manifold
Base and connect as in the steps 34 to 36. Wet
the O-ring with water. Connect the adjacent
Manifolds with the O-ring [24] and the V-band for
Manifold [25]. Make sure the bolts are securely
fastened to prevent leaks.

38. Repeat the steps 34 to 37 continuously to install the Manifolds.

39. Repeat the steps 34 to 37 for the last Manifold with the Manifold Stopper describedin the step 33.

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40. Connect the Air Pipe-1 and Air Pipe-2 [30] with
50A gasket and M16 X 65 mm Bolt Sets [31].

41. Place the Air Pipe assembled above on theCentral Fixture [20].

42. Insert the Air Tube [19] of each module to the Air
Pipe one by one.

43. Connect the Flange Conversions of all headers and Manifold, and the Air Pipes tothe existing pipes.
A check valve should be prepared and installed between the Air Pipe of the rack andthe existing pipes to avoid water reverse flow. The check valve is not included in theparts supplied by Toray.

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2. Disassembly and Disposal
Before disassembly, the corresponding rack must be isolated after the water is all drainedout.
The disassembly procedure is performed in reverse order to the assembly. Two workers
or more should be required for disassembly.

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VI. Operation
1. Filtration

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Toray UF(1) Check that all pipes are connected appropriately and flushed out prior to the 		
operation. Fig. 3 shows a standard example of membrane pipe connection.
(2) Make sure the feed water valve (V-1), the drainage valve (V-3), and the air-scrubbing
valve (V-2) are “closed”.
(3) Make sure the filtrate water valve (V-5) is opened. Open the air vent valve (V-4).
(4) Gradually open the feed water valve (V-1) and fill the feed water to the module to 		purge any air out.

(5) Confirm that the air is out of the module, and then close the air vent valve (V-4).
(6) Set appropriate volume of filtrate water flow.

(7) When stopping the operation, gradually close the feed water valve (V-1).
2. Backwash and Air-scrubbing
The physical cleaning with backwash followed by air-scrubbing should be carried out
periodically and automatically for the continuous filtration. The frequency of the physicalcleaning mainly depends on the raw water quality. For instance, a typical frequency forsurface water filtration is once every 30 minutes, but this might be changed depending on
raw water quality. Please contact us if you need technical support. Fig. 4 and Fig. 5. show
the standard flow diagrams for backwash and air-scrubbing.

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Toray UF(1) Close the feed water valve (V-1) and stop the feed water pump.
(2) Open the air vent valve (V-4).
(3) Close the filtrate water valve (V-5) and open the backwashing valve (V-6) to feed back		 the filtrate water from the backwashing tank to the membrane module. During backwash,		 the chemical feed pump can be operated to dose chemical to the backwash water. The
		 chemical is usually sodium hypochlorite, and the dosing rate should be up to 50 mg/L
		as Cl2.
		 The flow rate of backwash water is set up in advance for 1.0 to 1.5 times the filtrate flow		 rate. Do not exceed Max. Backwash Flow described in Table 4.

(4) After backwashing for a specified period (normally 30 seconds, up to 60 seconds),
close the backwashing valve (V-6) and stop the backwashing pump.
(5) Open the air vent valve (V-4) and the air-scrubbing valve (V-2) for a specified time 		(normally 30 seconds, up to 60 seconds).

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Toray UF(6) Close the air-scrubbing valve (V-2) and open the drainage valve (V-3).
(7) Close the drainage valve (V-3) after the water is all drained out.
(8) Run the feed water pump and open the feed water valve (V-1).
(9) Close the air vent valve (V-4) after the air is purged from the module.

3. Toray Maintenance Cleaning
Instead of chemical dosing for every backwash, soaking the membrane in chemical solution
several tens of minutes a day is also effective for membrane performance retention. This
process is called Toray Maintenance Cleaning (TMC). The TMC is usually held following
the backwash and air-scrubbing which does not contain the chemical dosing. The frequency(1) Open the air vent valve (V-4) and the drainage valve (V-3).
(2) Open the backwashing valve (V-6), run the NaClO feed pump and the backwashingpump to feed the chemical enhanced backwash water to the membrane module. The
chemical is usually sodium hypochlorite, and the dosing rate should be up to 300 mg/L
		 as Cl2 for TMC.
		 The flow rate of backwash water is set up in advance for 1.0 to 1.5 times the filtrate flow		 rate. Do not exceed Max. Backwash Flow described in Table 4.
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Toray UF(3) As soon as the NaClO is detected in the drainage water, close the drainage valve (V-3).
NaClO diluted with UF filtered water is applied to TMC cleaning solution usually. In thiscase, if the filtered water contains a lot of organic matter, NaClO will be consumed by theorganic matter, which may result in a substantial decrease of cleaning efficiency. Pleasecontact us if there is such concern.
(4) After making sure water comes out from upper part of the side nozzle of the membrane
module, stop the NaClO feed pump, close the backwashing valve (V-6), and stop the
backwashing pump.
(5) Soak the membrane in the chemical for a specified time (normally 20 minutes). And then,open the air-scrubbing valve (V-2) for a specified time (normally 60 seconds).

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Toray UF(6) Close the air-scrubbing valve (V-2), open the drainage valve (V-3) to drain the chemical		 from the membrane module.
(7) Close the drainage valve (V-3), and then open the backwashing valve (V-6) and run
		 the backwashing pump (normally 30 seconds). Stop the backwashing pump and close		 the backwashing valve (V-6), and then open the air-scrubbing valve (V-2) (normally 30
		seconds).
(8) Repeat the process of (6) to (7) until the overflow water meets the required water
		quality.
(9) Make sure the air-scrubbing valve (V-2) and the backwashing valve (V-6) are “closed”
		 and the backwashing pump is “stopped”.

4. Basic Trans-Membrane Pressure Calculation
To calculate accurate Trans-Membrane Pressure (TMP), it is necessary to involve theheight difference of inlet and outlet pressure gauges (see Fig. 9).
Example calculation of TMP (The specific gravity of water is set to 1)
		

TMP= (Pin - Hin) - (Pout - Hout)			= (70 - 10) - (20 - (- 25))

			

= 60 - 45

			= 15 kPa

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Note, the following formula may also be used:
		

TMP

			

= Pin - Pout - total delta H= 70 - 20 - (10 - (- 25)) = 15 kPa

5. Temperature Correction Factor
The permeability of the membrane is influenced by temperature mainly because the waterviscosity changes with temperature. It is necessary to eliminate the temperature effect with
the Temperature Correction Factor (TCF) shown in Fig. 10 to evaluate the permeability
correctly.
A Trans-Membrane Pressure (TMP) measured at some real temperature can be converted
to 25 deg C corrected TMP with multiplying by TCF at real temperature.
A filtrate flow rate measured at some real temperature can be converted to 25 deg C
corrected filtrate flow rate with divided by TCF at real temperature.

The equation for calculating TCF at a temperature (T deg C) is as follows.
TCF = 0.0008902 / (0.01257187 x EXP((10.005806436 x (273.15 + T)) /(0.001130911 x (273.15 + T) - 0.000005723952 x (273.15 + T) x (273.15 + T))) / 1000)
6. Performance Recording
To effectively evaluate the current UF system performance, including quick recognitionof undesirable trends in operation and appropriate countermeasures, it is necessary
to compare current operating performance data with a performance data which wererecorded at the first placed in service. Log the data which is related about the UF operationand must include regular information on: flow, trans-membrane pressure, contractuallyspecified feed water quality parameters and temperature, and elapsed time since start-up(days). The data might be captured and logged automatically every 2 seconds to support
optimizing the UF operation system.
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VII.

Chemical Cleaning

The chemical cleaning should be carried out to remove foulants accumulated in themembrane pores or sticking to the membrane surface.

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Toray UF(1) The flow diagrams for cleaning simultaneously both outer surface and inside of hollow
		 fiber membranes is shown in Fig. 11 and Fig. 12. The flow diagrams can be changed
		 case by case. Please contact us for further information if necessary.
(2) Open the chemical return valve and then open the chemical feed valve.
(3) Run the chemical feed pump to start for chemical circulation. Then, open the chemical		 filtrate valve to let the chemical pass through the membrane.
(4) Circulate the chemical for a specified time.
(5) Stop the chemical feed pump.
(6) Drain the chemical and rinse the cleaning line and the module thoroughly with product		water.

(7) The standard conditions for chemical cleaning are shown in Table 9.
		・The concentration and each circulation time shown in Table should be observed.
Otherwise, the membrane module may get damaged and/or the life of membrane
may be shortened.

		・The cleaning temperature should be 20 to 40 deg C.
		・The circulation flow rate for each type of the module is as follows.
		

HFUG-2020HN: 62.5 L/min (16.5 gpm)

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Toray UF*1): Besides citric acid, the following acids are acceptable.
		- Hydrochloric acid (with the maximum concentration of 1.0 mol/L)		- Oxalic acid (with the maximum concentration of 1.0 wt%)		

- Sulfuric acid (with the maximum concentration of 0.05 mol/L)		- Nitric acid (with the maximum concentration of 0.1 mol/L)

VIII.

Storage of Membrane Module

Follow the instruction below when you store the modules.

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1. Storage of New Membrane Modules
Keep the modules in the original package box in a dark and cool place (1 to 40 deg C).
Avoid direct sunlight and moisture.
2. Storage of Membrane Modules and Racks after Use(1) Short-term/temporary shutdown or storage
		In the case of the suspension of operation for less than four days, stop the feed waterand keep modules full of water at 1 to 40 deg C.

				

If suspended from four days to seven days, fill the module with the chemical describedin Table 10. Use filtrate quality water. Keep the modules at 1 to 40 deg C.

(2) Long-term storage
		 First, carry out a chemical cleaning with sodium hypochlorite. Fill the module with the		 chemical described in Table 11. Use filtrate quality water. Follow the instructions shown		in Table 11.
		 Keep the modules sealed with the aqueous chemical solution shown in Table 10 or		 Table 11. If removing modules from the system, seal the module and store out of direct
		 sunlight. Keep the modules at 1 to 40 deg C.

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3. Replace Preservative Solution
Check the pH value of sodium bisulfite solution as the preservative and replace the chemical
if the pH is below three (3.0). Sodium bisulfite solution with a pH of 3 to 6 is active for thepreservation. Sodium bisulfite reacts with oxygen and forms sulfuric acid which results in alower pH. In case that sodium hypochlorite is being used as the preservative, replace it if
the sodium hypochlorite concentration is less than 0.1 mg/L as Cl2.

IX. Appendix
Following information is provided in the separate-attached document.
(1) Assembly of “Toray UF TUF Rack” (Example: 2 rows x 12 modules)

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This Instruction Manual does not intend to guarantee the results ofapplication of the information provided herein or the safety and thecompatibility of this product.
Before using this product, the user is asked to check for its safety andcompatibility with the intended purpose.
The content of this Instruction Manual is subject to revision without
notice due to continual improvement.
Unauthorized use or reproduction of this manual is forbidden.

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Toray specializes in the development and manufactureof innovative membrane technologies. We offer an
integrated approach using our RO, NF, UF, MBR, andantiscalant products to solve water and process treatment
challenges. Contact us today to find out how Toray canhelp maximize water recovery, achieve high water quality
for water reuse, lower energy requirements, and minimize
life cycle costs. TORAY, experts in RO, NF, UF and MBR.

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