TLV T5N User manual

172-65117M-04 (T5N) 6 October 2021
Sight Glass
T5N
Copyright © 2021 by TLV CO., LTD.
All rights reserved

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Contents
Introduction .......................................................................1
Safety Considerations.......................................................2
Checking the Piping..........................................................4
Specifications....................................................................4
Configuration.....................................................................5
Installation.........................................................................5
Maintenance......................................................................6
Disassembly/Reassembly.................................................7
Troubleshooting ................................................................8
TLV EXPRESS LIMITED WARRANTY.............................9
Service ............................................................................11
Introduction
Thank you for purchasing the TLV sight glass.
This product has been thoroughly inspected before being shipped from the
factory. When the product is delivered, before doing anything else, check the
specifications and external appearance to make sure nothing is out of the
ordinary. Also be sure to read this manual carefully before use and follow the
instructions to be sure of using the product properly.
This sight glass is for installation in fluid piping to check the line flow and at
the outlet side of steam traps to monitor trap performance.
If detailed instructions for special order specifications or options not contained
in this manual are required, please contact TLV for full details.
This instruction manual is intended for use with the model(s) listed on the front
cover. It is necessary not only for installation but for subsequent maintenance,
disassembly/reassembly and troubleshooting. Please keep it in a safe place
for future reference.

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Safety Considerations
Read this section carefully before use and be sure to follow the instructions.
Installation, inspection, maintenance, repairs, disassembly, adjustment, and valve
opening/closing should be carried out only by trained maintenance personnel.
The precautions listed in this manual are designed to ensure safety and prevent
equipment damage and personal injury. For situations that may occur as a result
of erroneous handling, three different types of cautionary items are used to
indicate the degree of urgency and the scale of potential damage and danger:
DANGER, WARNING and CAUTION.
The three types of cautionary items above are very important for safety: be sure
to observe all of them as they relate to installation, use, maintenance, and repair.
Furthermore, TLV accepts no responsibility for any accidents or damage
occurring as a result of failure to observe these precautions.
Symbols
Indicates a DANGER, WARNING or CAUTION item.
Indicates an urgent situation which poses a threat of death or
serious injury
Indicates that there is a potential threat of death or serious injury
Indicates that there is a possibility of injury or equipment / product
damage
As glass parts will wear and deteriorate in quality, they should
be replaced annually.
Be careful not to damage the glass by striking it with objects or
inflicting any other shocks.
Use only under conditions in which no water hammer will occur.
Avoid rapid cooling of the glass by pouring water on it, etc.
Be sure to observe the proper tightening torque for the glass
holder.
If the glass becomes damaged, subsequent fluid discharge could
result in injury or other damage.
DO NOT use this product outside the recommended operating
pressure, temperature and other specification ranges.
Improper use may result in such hazards as damage to the product
or malfunctions that may lead to serious accidents. Local regulations
may restrict the use of this product to below the conditions quoted.
Take measures to prevent people from coming into direct
contact with product outlets.
Failure to do so may result in burns or other injury from the discharge
of fluids.
Continued on the next page
DANGER
WARNING
CAUTION
WARNING
CAUTION

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When disassembling or removing the product, wait until the
internal pressure equals atmospheric pressure and the surface
of the product has cooled to room temperature.
Disassembling or removing the product when it is hot or under
pressure may lead to discharge of fluids, causing burns, other
injuries or damage.
Be sure to use only the recommended components when
repairing the product, and NEVER attempt to modify the product
in any way.
Failure to observe these precautions may result in damage to the
product and burns or other injury due to malfunction or the discharge
of fluids.
Use only under conditions in which no freeze-up will occur.
Freezing may damage the product, leading to fluid discharge, which
may cause burns or other injury.
Do not use excessive force when connecting threaded pipes to
the product.
Over-tightening may cause breakage leading to fluid discharge,
which may cause burns or other injury.
Use only under conditions in which no water hammer will occur.
The impact of water hammer may damage the product, leading to
fluid discharge, which may cause burns or other injury.
CAUTION

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Checking the Piping
Use only under conditions in which no water hammer will occur. If the
glass becomes damaged, subsequent fluid discharge could result in
injury or other damage.
WARNING
Check to make sure that the piping to which the product is to be connected has been
installed properly.
1. Is the pipe diameter suitable?
2. Has sufficient space been secured for maintenance?
3. Have maintenance valves been installed at the inlet and outlet?
Specifications
As glass parts will wear and deteriorate in quality, they should be
replaced annually. If the glass becomes damaged, subsequent fluid
discharge could result in injury or other damage.
WARNING
DO NOT use this product outside the recommended operating pressure,
temperature and other specification ranges. Improper use may result in
such hazards as damage to the product or malfunctions which may
lead to serious accidents. Local regulations may restrict the use of this
product to below the conditions quoted.
CAUTION
Use only under conditions in which no freeze-up will occur. Freezing
may damage the product, leading to fluid discharge, which may cause
burns or other injury.
CAUTION
Refer to the product nameplate for detailed specifications.
* Maximum allowable pressure (PMA) and maximum allowable temperature (TMA) are
PRESSURE SHELL DESIGN CONDITIONS, NOT OPERATING CONDITIONS.
** “Valve Number” is displayed for products with options. This item is omitted from the
nameplate when there are no options.
Model
Maximum Allowable
Temperature*
Maximum Allowable
Pressure*
Nominal Diameter
Maximum Operating
Pressure
Maximum Operating
Temperature
Serial Number
Valve Number**

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Configuration
T5N
No.
Name
R
1
Body
2
Side Sight Glass

3
Sight Glass

4
Glass Holder
5
Ball

6
Sight Glass Gasket

7
Nameplate
8
Glass Holder
Gasket

R: Part included in repair kit;
parts not available separately
Installation
As glass parts will wear and deteriorate in quality, they should be
replaced annually. If the glass becomes damaged, subsequent fluid
discharge could result in injury or other damage.
WARNING
DO NOT use this product outside the recommended operating pressure,
temperature and other specification ranges. Improper use may result in
such hazards as damage to the product or malfunctions which may
lead to serious accidents. Local regulations may restrict the use of this
product to below the conditions quoted.
CAUTION
Take measures to prevent people from coming into direct contact with
product outlets. Failure to do so may result in burns or other injury from
the discharge of fluids.
CAUTION
Do not use excessive force when connecting threaded pipes to the
product. Over-tightening may cause breakage leading to fluid
discharge, which may cause burns or other injury.
CAUTION
Installation, inspection, maintenance, repairs, disassembly, adjustment and valve
opening/closing should be carried out only by trained maintenance personnel.
1. Before installation, be sure to remove all protective seals.
2. Before installing the product, open the inlet valve and blow out the piping to
remove any piping scraps, dirt and oil. Close the inlet valve after blowdown.
3. Install the product so the arrow on the body is pointing in the direction of flow.
4. Install on horizontal piping with the glass portion facing up.
5. Open the inlet valve and check to make sure that the product functions properly.
6. As sight glasses deteriorate with use, they should be replaced annually to ensure
safety.
If there is a problem, determine the cause using the “Troubleshooting” section in this
manual.

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Maintenance
As glass parts will wear and deteriorate in quality, they should be
replaced annually. Be careful not to damage the glass by striking it with
objects or inflicting any other shocks. If the glass becomes damaged,
subsequent fluid discharge could result in injury or other damage.
WARNING
Take measures to prevent people from coming into direct contact with
product outlets. Failure to do so may result in burns or other injury from
the discharge of fluids.
CAUTION
Be sure to use only the recommended components when repairing the
product, and NEVER attempt to modify the product in any way. Failure to
observe these precautions may result in damage to the product or burns
or other injury due to malfunction or the discharge of fluids.
CAUTION
Operational Check
A visual inspection of the following items should be done on a daily basis to
determine whether the product is operating properly or has failed. Periodically (at
least biannually) the operation should also be checked visually or by using diagnostic
equipment, such as a stethoscope.
If the product should fail, it may cause damage to piping and equipment, resulting in
faulty or low quality products or losses.
Normal:
When flowing fluid is present, the ball moves.
(The sound of flow can be heard.)
Failure:
- Fluid leaks to the outside of the product.
- The ball is not visible.
- The ball does not move.
Parts Inspection
When parts have been removed, or during periodic inspections, use the following
table to inspect the parts and replace any that are found to be defective.
Procedure
Gaskets:
Check for warping or damage
Glasses:
Check for fractures or cracks
Ball:
Check for deformation

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Disassembly/Reassembly
As glass parts will wear and deteriorate in quality, they should be
replaced annually. Be careful not to damage the glass by striking it with
objects or inflicting any other shocks. If the glass becomes damaged,
subsequent fluid discharge could result in injury or other damage.
WARNING
When disassembling or removing the product, wait until the internal
pressure equals atmospheric pressure and the surface of the product
has cooled to room temperature. Disassembling or removing the
product when it is hot or under pressure may lead to discharge of fluids,
causing burns, other injuries or damage.
CAUTION
Use the following procedures to remove components. Use the same procedures in
reverse to reassemble. (Installation, inspection, maintenance, repairs, disassembly,
and adjustment should be done only by trained maintenance personnel.)
Disassembly/Reassembly
Part
During Disassembly
During Reassembly
Glass Holder
Remove with a wrench
Clean seat surfaces; consult the table of
tightening torques and tighten to the proper
torque
Glass Holder Gasket
Remove the gasket and
clean sealing surfaces
Replace with a new gasket
Sight Glass
Remove, being careful not
to scratch the surface
Clean seat surfaces; reinsert, being careful
not to scratch the surface
Sight Glass Gasket
Remove the gasket and
clean sealing surfaces
Replace with a new gasket
Side Sight Glass
Remove, being careful not
to scratch the surface
Clean seat surfaces; reinsert, being careful
not to scratch the surface
Sight Glass Gasket
Remove the gasket and
clean sealing surfaces
Replace with a new gasket
Ball
—
Replace with anew ball if badly worn
Table of Tightening Torques
Be sure to observe the proper tightening torque for the glass holder. If
the glass becomes damaged, subsequent fluid discharge could result
in injury or other damage.
WARNING
Part
Torque (N∙m)
Distance Across Flats (mm)
Glass Holder
40
64
(1 N∙m 10 kg∙cm)

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Troubleshooting
As glass parts will wear and deteriorate in quality, they should be
replaced annually. Be careful not to damage the glass by striking it with
objects or inflicting any other shocks. If the glass becomes damaged,
subsequent fluid discharge could result in injury or other damage.
WARNING
When disassembling or removing the product, wait until the internal
pressure equals atmospheric pressure and the surface of the product
has cooled to room temperature. Disassembling or removing the
product when it is hot or under pressure may lead to discharge of fluids,
causing burns, other injuries or damage.
CAUTION
When the product fails to operate properly, use the following table to locate the cause
and remedy.
Problem
Cause
Remedy
Ball is not visible
(Glass is dirty)
The glass is dirty
Clean glass
There is an build-up of dirt inside the body
Clean
Leaks to the
outside of the
product
Deterioration or damage to gaskets
Replace with new gaskets
Improper glass holder tightening torque
was used
Tighten to the proper
torque
The glass displays wear, cracks or other
damage
Replace with new glass
Glass becomes
damaged
The operating pressure or temperature
exceed the maximum specified operating
conditions
Compare specifications
and actual operating
conditions
The glass has outlived its projected service
life
Replace with new glass
Ball does not
move
The body is clogged with dirt, of there is a
build-up on the ball
Clean parts
NOTE: When replacing parts with new, use the parts list for reference, and replace with parts from the
repair kit. Please note that replacement parts are only available as part of the repair kit.

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TLV EXPRESS LIMITED WARRANTY
Subject to the limitations set forth below, TLV CO., LTD., a Japanese corporation
(“TLV”), warrants that products which are sold by it, TLV International Inc. (“TII”) or
one of its group companies excluding TLV Corporation (a corporation of the United
States of America), (hereinafter the “Products”) are designed and manufactured by
TLV, conform to the specifications published by TLV for the corresponding part
numbers (the “Specifications”) and are free from defective workmanship and
materials. The party from whom the Products were purchased shall be known
hereinafter as the “Seller”. With regard to products or components manufactured by
unrelated third parties (the “Components”), TLV provides no warranty other than the
warranty from the third party manufacturer(s), if any.
Exceptions to Warranty
This warranty does not cover defects or failures caused by:
1. improper shipping, installation, use, handling, etc., by persons other than TLV,
TII or TLV group company personnel, or service representatives authorized by
TLV; or
2. dirt, scale or rust, etc.; or
3. improper disassembly and reassembly, or inadequate inspection and
maintenance by persons other than TLV or TLV group company personnel, or
service representatives authorized by TLV; or
4. disasters or forces of nature or Acts of God; or
5. abuse, abnormal use, accidents or any other cause beyond the control of TLV,
TII or TLV group companies; or
6. improper storage, maintenance or repair; or
7. operation of the Products not in accordance with instructions issued with the
Products or with accepted industry practices; or
8. use for a purpose or in a manner for which the Products were not intended; or
9. use of the Products in a manner inconsistent with the Specifications; or
10. use of the Products with Hazardous Fluids (fluids other than steam, air, water,
nitrogen, carbon dioxide and inert gases (helium, neon, argon, krypton, xenon
and radon)); or
11. failure to follow the instructions contained in the TLV Instruction Manual for the
Product.
Duration of Warranty
This warranty is effective for a period of one (1) year after delivery of Products to the
first end user. Notwithstanding the foregoing, asserting a claim under this warranty
must be brought within three (3) years after the date of delivery to the initial buyer if
not sold initially to the first end user.
ANY IMPLIED WARRANTIES NOT NEGATED HEREBY WHICH MAY ARISE BY
OPERATION OF LAW, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE AND ANY EXPRESS WARRANTIES NOT
NEGATED HEREBY, ARE GIVEN SOLELY TO THE INITIAL BUYER AND ARE LIMITED IN
DURATION TO ONE (1) YEAR FROM THE DATE OF SHIPMENT BY THE SELLER.
Exclusive Remedy
THE EXCLUSIVE REMEDY UNDER THIS WARRANTY, UNDER ANY EXPRESS
WARRANTY OR UNDER ANY IMPLIED WARRANTIES NOT NEGATED HEREBY
(INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE), IS REPLACEMENT; PROVIDED: (a) THE CLAIMED DEFECT IS

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REPORTED TO THE SELLER IN WRITING WITHIN THE WARRANTY PERIOD, INCLUDING
A DETAILED WRITTEN DESCRIPTION OF THE CLAIMED DEFECT AND HOW AND WHEN
THE CLAIMED DEFECTIVE PRODUCT WAS USED; AND (b) THE CLAIMED DEFECTIVE
PRODUCT AND A COPY OF THE PURCHASE INVOICE IS RETURNED TO THE SELLER,
FREIGHT AND TRANSPORTATION COSTS PREPAID, UNDER A RETURN MATERIAL
AUTHORIZATION AND TRACKING NUMBER ISSUED BY THE SELLER. ALL LABOR
COSTS, SHIPPING COSTS, AND TRANSPORTATION COSTS ASSOCIATED WITH THE
RETURN OR REPLACEMENT OF THE CLAIMED DEFECTIVE PRODUCT ARE SOLELY
THE RESPONSIBILITY OF BUYER OR THE FIRST END USER. THE SELLER RESERVES
THE RIGHT TO INSPECT ON THE FIRST END USER’S SITE ANY PRODUCTS CLAIMED
TO BE DEFECTIVE BEFORE ISSUING A RETURN MATERIAL AUTHORIZATION. SHOULD
SUCH INSPECTION REVEAL, IN THE SELLER’S REASONABLE DISCRETION, THAT THE
CLAIMED DEFECT IS NOT COVERED BY THIS WARRANTY, THE PARTY ASSERTING
THIS WARRANTY SHALL PAY THE SELLER FOR THE TIME AND EXPENSES RELATED
TO SUCH ON-SITE INSPECTION.
Exclusion of Consequential and Incidental Damages
IT IS SPECIFICALLY ACKNOWLEDGED THAT THIS WARRANTY, ANY OTHER EXPRESS
WARRANTY NOT NEGATED HEREBY, AND ANY IMPLIED WARRANTY NOT NEGATED
HEREBY, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, DO NOT COVER, AND NEITHER TLV, TII NOR ITS TLV
GROUP COMPANIES WILL IN ANY EVENT BE LIABLE FOR, INCIDENTAL OR
CONSEQUENTIAL DAMAGES, INCLUDING, BUT NOT LIMITED TO LOST PROFITS, THE
COST OF DISASSEMBLY AND SHIPMENT OF THE DEFECTIVE PRODUCT, INJURY TO
OTHER PROPERTY, DAMAGE TO BUYER’S OR THE FIRST END USER’S PRODUCT,
DAMAGE TO BUYER’S OR THE FIRST END USER’S PROCESSES, LOSS OF USE, OR
OTHER COMMERCIAL LOSSES. WHERE, DUE TO OPERATION OF LAW,
CONSEQUENTIAL AND INCIDENTAL DAMAGES UNDER THIS WARRANTY, UNDER ANY
OTHER EXPRESS WARRANTY NOT NEGATED HEREBY OR UNDER ANY IMPLIED
WARRANTY NOT NEGATED HEREBY (INCLUDING THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE) CANNOT BE
EXCLUDED, SUCH DAMAGES ARE EXPRESSLY LIMITED IN AMOUNT TO THE
PURCHASE PRICE OF THE DEFECTIVE PRODUCT. THIS EXCLUSION OF
CONSEQUENTIAL AND INCIDENTAL DAMAGES, AND THE PROVISION OF THIS
WARRANTY LIMITING REMEDIES HEREUNDER TO REPLACEMENT, ARE INDEPENDENT
PROVISIONS, AND ANY DETERMINATION THAT THE LIMITATION OF REMEDIES FAILS
OF ITS ESSENTIAL PURPOSE OR ANY OTHER DETERMINATION THAT EITHER OF THE
ABOVE REMEDIES IS UNENFORCEABLE, SHALL NOT BE CONSTRUED TO MAKE THE
OTHER PROVISIONS UNENFORCEABLE.
Exclusion of Other Warranties
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED,
AND ALL OTHER WARRANTIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE,
ARE EXPRESSLY DISCLAIMED.
Severability
Any provision of this warranty which is invalid, prohibited or unenforceable in any
jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such invalidity,
prohibition or unenforceability without invalidating the remaining provisions hereof,
and any such invalidity, prohibition or unenforceability in any such jurisdiction shall
not invalidate or render unenforceable such provision in any other jurisdiction.

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Service
For Service or Technical Assistance: Contact your TLV representative or your regional TLV office.
In Europe:
Daimler-Benz-Straße 16-18, 74915 Waibstadt, Germany
Tel:
Fax:
[49]-(0)7263-9150-0
[49]-(0)7263-9150-50
Units 7 & 8, Furlong Business Park, Bishops Cleeve, Gloucestershire GL52
8TW, U.K.
Tel:
Fax:
[44]-(0)1242-227223
[44]-(0)1242-223077
Parc d’Ariane 2, bât. C, 290 rue Ferdinand Perrier, 69800 Saint Priest,
France
Tel:
Fax:
33–(0)4-72482222
[33]-(0)4-72482220
In North America:
13901 South Lakes Drive, Charlotte, NC 28273-6790, U.S.A.
Tel:
Fax:
[1]-704-597-9070
[1]-704-583-1610
In Mexico and Latin America:
Av. Jesús del Monte 39-B-1001, Col. Hda. de las Palmas, Huixquilucan,
Edo. de México, 52763, Mexico
Tel:
Fax:
[52]-55-5359-7949
[52]-55-5359-7585
In Oceania:
Unit 8, 137-145 Rooks Road, Nunawading, Victoria 3131, Australia
Tel:
Fax:
[61]-(0)3-9873 5610
[61]-(0)3-9873 5010
In East Asia:
36 Kaki Bukit Place, #02-01/02, Singapore 416214
Tel:
Fax:
[65]-6747 4600
[65]-6742 0345
Room 5406, No. 103 Cao Bao Road, Shanghai, China 200233
Tel:
Fax:
[86]-(0)21-6482-8622
[86]-(0)21-6482-8623
No.16, Jalan MJ14, Taman Industri Meranti Jaya, 47120 Puchong,
Selangor, Malaysia
Tel:
Fax:
[60]-3-8065-2928
[60]-3-8065-2923
252/94 (K-L) 17th Floor, Muang Thai-Phatra Complex Tower B,
Rachadaphisek Road, Huaykwang, Bangkok 10310, Thailand
Tel:
Fax:
[66]-2-693-3799
[66]-2-693-3979
#302-1 Bundang Technopark B, 723 Pangyo-ro, Bundang, Seongnam,
Gyeonggi, 13511, Korea
Tel:
Fax:
[82]-(0)31-726-2105
[82]-(0)31-726-2195
In the Middle East:
Building 2W, No. M002, PO Box 371684, Dubai Airport Free Zone, Dubai, UAE
Email:
[email protected]
In Other Countries:
881 Nagasuna, Noguchi, Kakogawa, Hyogo 675-8511, Japan
Tel:
Fax:
[81]-(0)79-427-1818
[81]-(0)79-425-1167
Manufacturer:
881 Nagasuna, Noguchi, Kakogawa, Hyogo 675-8511, Japan
Tel:
Fax:
[81]-(0)79-422-1122
[81]-(0)79-422-0112