TLV NF6 User manual

172-65134A-03 (NF6) 16 December 2019
Manufacturer
881 Nagasuna, Noguchi, Kakogawa, Hyogo, 675-8511, Japan
Tel: [81]-(0)79-422-1122 Fax: [81]-(0)79-422-0112
Copyright © 2019 by TLV CO., LTD. All rights reserved
Automatic Non-freeze Valve
NF6

172-65134A-03 (NF6) 16 Dec 2019
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Contents
Introduction .......................................................................1
Safety Considerations.......................................................2
Specifications....................................................................3
Configuration.....................................................................3
Installation.........................................................................3
Special Considerations for Product Use ...........................4
Maintenance......................................................................5
Disassembly/Reassembly.................................................5
Troubleshooting ................................................................6
EXPRESS LIMITED WARRANTY...........................7
Introduction
Thank you for purchasing the TLV non-freeze valve.
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 non-freeze valve is compact with simple construction. It comes with an
integrated screen, installation is easy and no adjustment is necessary. This
product is especially effective for steam traps installed in cold areas where
freezing is likely to occur. Condensate remaining inside the trap is discharged
to prevent possible damage caused by its expansion when freezing. This
non-freeze valve is also useful for reducing labor requirements for
maintenance and operation (bypass blowdown).
This non-freeze valve can be easily installed on most TLV steam traps.
Please contact TLV for more details.
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.

172-65134A-03 (NF6) 16 Dec 2019
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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.
DANGER
Indicates an urgent situation which poses a threat of death or
serious injury
WARNING
Indicates that there is a potential threat of death or serious injury
CAUTION
Indicates that there is a possibility of injury or equipment/product
damage
CAUTION
Install properly and 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 regulat
ions
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.
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 bu
rns or other injury due to malfunction or the discharge
of fluids.
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.

172-65134A-03 (NF6) 16 Dec 2019
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Specifications
Install properly and 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
Model
Connection
Max. Operating
Pressure
PMO
Max. Operating
Temperature
TMO
Max. Allowable
Pressure*
PMA
Max. Allowable
Temperature*
TMA
Inlet
Outlet
(male)
(female)
MPaG
(psig)
°C
(°F)
MPaG
(psig)
°C
(°F)
NF6
G(PF)
1/4
**
R(PT)
1/4
G(PF)1/4** 2.0 (285) 220 (428) 2.0 (285) 220 (428)
Valve Closing Pressure: 0.016 to 0.047 MPaG (2.3 to 6.8 psig)
(Average: approx. 0.03 MPaG (5 psig))
Valve Opening Pressure: 0.012 to 0.026 MPaG (1.7 to 3.8 psig)
(Average: approx.0.02 MPaG (3 psig))
*Maximum allowable pressure (PMA) and maximum allowable temperature (TMA) are
PRESSURE SHELL DESIGN CONDITIONS, NOT OPERATING CONDITIONS.
**Equivalent to BSPP1/4
NOTE: For special order products, confirm the details on the drawing, etc., as the specification
may be different from the above.
Configuration
No.
Name
No.
Name
1
Body
5
Coil Spring
2
Valve Seat
6
Screen
3
Valve Disc
7
Gasket*
4
Valve Disc Guide
*Only on NF6 with straight G(PF) thread. NF6 with
tapered R(PT) thread has no gasket
Installation
Install properly and 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 installing the non-freeze valve, blow out any piping scraps, dirt and oil
from the piping and steam trap the non-freeze valve is to be installed on.
2. Before installation, be sure to remove any protective seals.

172-65134A-03 (NF6) 16 Dec 2019
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3. Install the non-freeze valve at the proper location on the steam trap so that the
flow direction of the valve matches with that of condensate. (See the
“Disassembly/Reassembly” section for the proper torque.)
4. Install outlet piping. Make sure that the internal diameter of the pipe and joints are
thick and short with an inner diameter of ø6 mm (15/64) or larger.
5. Do not install a needle or other valve at the outlet (except for full-bore ball valves).
6. Open the inlet and outlet valves of the steam trap and allow the trap to operate
normally. After that, close the inlet and outlet valves and check to make sure that
the non-freeze valve opens and functions properly when the internal pressure
(temperature) decreases.
If there is a problem, determine the cause using the “Troubleshooting” section in this
manual.
Special Considerations for Product Use
1. Outlet pipe should have as steep a downward incline as possible so that
the condensate can smoothly and rapidly flow out from the pipe.
Condensate needs to be discharged from the piping before the temperature
decreases below the freezing point. This product cannot function once freezing
has occurred at the outlet side. Do not recover the condensate.
2. Outlet piping should be as thick and as short as possible.
Freezing occurs from the outside of the outlet pipe. If the outlet pipe is thin and
long, the condensate temperature can decrease while flowing, gradually freezing
along the pipe’s inner surface. Eventually, the pipe may become blocked, with
condensate backing up and freezing in the steam trap, possibly causing damage.
To prevent such an occurrence, the outlet pipe should be as thick and as short as
possible with an internal diameter ø6 mm (15/64) or larger and discharge to
atmosphere. When used in extreme cold, due to the possibility of freezing while
discharging, prevention of freezing cannot be guaranteed.
3. Relation between required inlet pressure and length of NF6 outlet pipe.
If there are any bends, or the pipe length is long, outlet pressure of NF6
increases due to high resistance from the pipe, and the valve may not close. To
avoid such a phenomenon, use the non-freeze valve on a steam trap with an inlet
pressure shown on the following graph.
0
0.05
0.1
0.15
0.2
00.5 11.5 22.5 33.5
1050 30
20
10
0
Steam Trap Inlet
Pressure (MPaG)
Steam Trap Inlet
Pressure (psig)
Maximum Pipe Length* (m)
Maximum Pipe Length* (ft)
Use the non-freeze
valve on a steam trap
with an inlet pressure
as shown on the graph
* ø6 mm (15/64) or larger
internal diameter and
bending at
no more than
3 locations.

172-65134A-03 (NF6) 16 Dec 2019
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Maintenance
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 should be done on a daily basis to determine whether the
product is operating properly or is leaking.
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
Valve Disc & Valve Seat:
Check for oil film, warping, scratches or other wear
Screen:
Check for clogging or corrosion
Disassembly/Reassembly
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
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
Use the following procedures to remove components. Use the same procedures in
reverse to reassemble. (Installation, inspection, maintenance, repairs, disassembly,
adjustment and valve opening/closing should be carried out only by trained
maintenance personnel.)
Removing/Reattaching the Outer Cover
Part
During Disassembly
During Reassembly
Valve Seat
Hold the body with one wrench and
remove the valve seat with another
Consult the table of tightening torques and
tighten to the proper torque
Coil Spring
Remove
Reinsert
Valve Disc
Remove being careful not to
scratch the seating surface
Insert with the proper orientation
(refer to Configuration and Exploded View)
Valve Disc
Guide
Remove Insert with the proper orientation
(refer to Configuration and Exploded View)
Screen
Remove without bending
Reinsert without bending

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Table of Tightening Torques
Part
Torque
Distance Across Flats
N∙m
(lbf∙ft)
mm
(in)
Valve Seat*
35
(26)
17
(21/32)
Body
Straight G(PF) thread*
35
(26)
21
(13/16)
Tapered R(PT) thread**
30
(22)
21
(13/16)
NOTE:
*Coat threads with anti-seize
**Wrap threads with 3 - 3.5 turns of sealing tape
-If drawings or other special documentation were supplied for
the product, any torque given there takes precedence over
values shown here.
(1 N⋅m ≈10 kg⋅cm)
Exploded View
Valve Seat
Coil Spring
Valve Disc
Valve Disc Guide
Screen
Body
Troubleshooting
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
No condensate is
discharged
(blocked) or
discharge is poor
Valve disc, valve seat, screen, or
piping is clogged with rust or scale
Clean parts
Freezing occurs on outlet pipe, etc.
Examine the size, length and
installation of the outlet pipe
and take
appropriate corrective measures
Steam is
discharged or
leaks from the
outlet
(blowing)
(steam leakage)
Rust or scale or other build up have
accumulated on the valve disc or
valve seat
Clean parts
Valve disc or valve seat are
damaged
Replace with a new valve and valve
seat
Improper installation orientation
Reinstall with correct flow direction
Improper installation, size or length
of outlet pipe
Make sure outlet pipe is at least ø6
mm (15/64) internal dia., of appropriate
length and has no more than 3 bends
Steam leaks from
a place other than
the outlet
Gasket deterioration or damage
Replace with a new gasket
Improper tightening torques were
used
Tighten to the proper torque

172-65134A-03 (NF6) 16 Dec 2019
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EXPRESS LIMITED WARRANTY
Subject to the limitations set forth below, TLV Corporation, a North Carolina corporation
(“TLV”) warrants that products which are sold byit or TLVInternational, Inc., a Japanese
corporation (“TII”), which products (the “Products”) are designed andmanufactured by
TLV Co., Ltd., aJapanese corporation (“TLVJ”),conform to the specifications published
by TLV for the corresponding part numbers (the “Specifications”) and arefree from
defective workmanship and materials. 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).
Exceptions To Warranty
This warranty doesnot cover defects or failures caused by:
1. improper shipping,installation, use, handling, etc., by other than TLV or service
representatives authorized by TLV; or
2. dirt, scale or rust, etc.;or
3. improper disassemblyand reassembly, or inadequate inspection and maintenance
by other than TLV or service representatives authorized by TLV; or
4. disasters or forces of nature; or
5. abuse, abnormal use, accidents or any other cause beyond the control of TLV; or
6. improper storage,maintenance or repair;or
7. operationof the Products not in accordance with instructions issued with the
Products or with accepted industry practices; or
8. use for a purpose or in amanner for which the Products were notintended; or
9. use of the Products in amannerinconsistent with the Specifications; or
10. failure tofollow the instructions contained in the TLV Instruction Manual for the
Product.
Duration Of Warranty
This warranty is effective for aperiodof the earlier of: (i) three(3) years after delivery
of Products to the first end user in the case of sealed SST-Series Products for use in
steam pressure service up to650 psig;(ii) two (2) years after delivery of Products to
the firstend user in the case of PowerTrap
®
units;or (iii) one (1) year after delivery of
Products to the first end user in the case of all other Products. Notwithstanding the
foregoing, asserting aclaim under this warranty must be brought by the earlier of one
of the foregoing periods, as applicable, or within five (5) years after thedate of
delivery tothe initial buyer if notsoldinitially tothe firstend user.
ANY IMPLIED WARRANTIES NOT NEGATED HEREBY WHICH MAY ARISE BY
OPERATIONOF LAW, INCLUDING THE IMPLIEDWARRANTIES OF MERCHANTABILITY
AND FITNESS FOR APARTICULAR PURPOSE AND ANY EXPRESS WARRANTIES NOT
NEGATED HEREBY, ARE GIVENSOLELY TO THE INITIAL BUYER AND ARELIMITED IN
DURATION TO ONE (1) YEAR FROM THE DATE OF SHIPMENT BY TLV.
Exclusive Remedy
THE EXCLUSIVE REMEDY UNDERTHIS WARRANTY, UNDER ANY EXPRESS WARRANTY
OR UNDER ANY IMPLIED WARRANTIES NOT NEGATED HEREBY (INCLUDING THE
IMPLIEDWARRANTIES OF MERCHANTABILITY AND FITNESS FOR APARTICULAR
PURPOSE), IS REPLACEMENT;PROVIDED:(a) THE CLAIMED DEFECT IS REPORTED TO
TLV IN WRITING WITHIN THE APPLICABLE WARRANTY PERIOD, INCLUDING ADETAILED
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 TLV, FREIGHT AND

172-65134A-03 (NF6) 16 Dec 2019
8
TRANSPORTATION COSTS PREPAID,UNDER ARETURN MATERIAL AUTHORIZATION
AND TRACKING NUMBERISSUED BYTLV.ALLLABOR COSTS, SHIPPING COSTS, AND
TRANSPORTATIONCOSTSASSOCIATEDWITH THE RETURN OR REPLACEMENT OF
THE CLAIMED DEFECTIVE PRODUCT ARE SOLELY THE RESPONSIBILITY OF BUYER OR
THE FIRST END USER. TLVRESERVES THERIGHT TOINSPECT ON THE FIRSTEND
USER’S SITE ANY PRODUCTSCLAIMED TO BE DEFECTIVE BEFORE ISSUINGARETURN
MATERIAL AUTHORIZATION. SHOULD SUCH INSPECTION REVEAL,IN TLV’S
REASONABLE DISCRETION, THAT THE CLAIMEDDEFECT ISNOT COVERED BYTHIS
WARRANTY, THEPARTY ASSERTING THIS WARRANTY SHALL PAY TLV FOR THE TIME
AND EXPENSES RELATED TO SUCH ON-SITE INSPECTION.
Exclusion OfConsequentialAnd IncidentalDamages
IT IS SPECIFICALLYACKNOWLEDGED THAT THIS WARRANTY, ANY OTHER EXPRESS
WARRANTY NOT NEGATED HEREBY,AND ANY IMPLIEDWARRANTY NOT NEGATED
HEREBY, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR APARTICULAR PURPOSE, DO NOT COVER, AND NEITHER TLV, TII NOR TLVJ WILL
IN ANY EVENT BE LIABLE FOR, INCIDENTAL OR CONSEQUENTIAL DAMAGES,
INCLUDING, BUT NOT LIMITEDTO LOST PROFITS, THE COST OF DISASSEMBLY AND
SHIPMENT OF THE DEFECTIVE PRODUCT, INJURY TO OTHER PROPERTY, DAMAGE TO
BUYER’S ORTHE FIRSTEND USER’S PRODUCT, DAMAGE TO BUYER’SOR THEFIRST
END USER’SPROCESSES,LOSS OFUSE,OR OTHER COMMERCIALLOSSES. WHERE,
DUE TO OPERATION OF LAW, CONSEQUENTIAL AND INCIDENTAL DAMAGES UNDER
THIS WARRANTY, UNDER ANY OTHER EXPRESS WARRANTY NOT NEGATED HEREBY
OR UNDER ANY IMPLIEDWARRANTY NOT NEGATED HEREBY (INCLUDING THE
IMPLIEDWARRANTIES OF MERCHANTABILITY ANDFITNESS FOR APARTICULAR
PURPOSE)CANNOT BE EXCLUDED, SUCH DAMAGES ARE EXPRESSLY LIMITED IN
AMOUNT TO THE PURCHASE PRICE OF THEDEFECTIVE PRODUCT. THIS EXCLUSION
OF CONSEQUENTIAL ANDINCIDENTAL DAMAGES, AND THEPROVISIONOF THIS
WARRANTY LIMITINGREMEDIES HEREUNDER TO REPLACEMENT, ARE INDEPENDENT
PROVISIONS, AND ANY DETERMINATIONTHAT THE LIMITATION OF REMEDIES FAILS
OF ITS ESSENTIALPURPOSEOR ANY OTHER DETERMINATION THAT EITHER OF THE
ABOVE REMEDIESISUNENFORCEABLE,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 APARTICULAR 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 tothe extent of suchinvalidity,
prohibition or unenforceability withoutinvalidating the remaining provisions hereof,
and any such invalidity,prohibitionor unenforceabilityin any such jurisdiction shall not
invalidate or render unenforceable such provision in anyother jurisdiction.
13901 South Lakes Drive,Charlotte, NC 28273-6790, U.S.A.
Tel: [1]-704-597-9070 Fax: [1]-704-583-1610