TLV VA1 User manual

172-65167M-01 (VA Series) 8 January 2003
Rapid Initial Air Vent
VA1 x
xx
x
VA2
VA3 x
xx
x
VA4 x
xx
x
VA5
Copyright © 2003 by TLV CO., LTD.
All rights reserved
ISO 9001/ ISO 14001
Manufacturer
Kakogawa, Japan
is approved by LRQA LTD. to ISO 9001/14001

172-65167M-01 (VA Series) 8 Jan 2003
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Contents
Introduction........................................................................ 1
Safety Considerations ....................................................... 2
Features of the VA Air Vent............................................... 4
Operation........................................................................... 4
Specifications .................................................................... 5
Configuration ..................................................................... 5
Installation ......................................................................... 6
Maintenance...................................................................... 7
Disassembly / Reassembly ............................................... 7
Troubleshooting................................................................. 8
Product Warranty............................................................... 9
Introduction
Thank you for purchasing the Rapid Initial Air Vent.
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 rapid initial air vent features a precision-polished float and rubber valve seat
combination that assures a tight seal. Simple, compact construction with no hinges
or levers and only one moving part, the float, provides trouble-free operation and
long service life. The rapid initial air vent is ideal for use where transport of hot or
cold water must take place quickly, such as water supply piping, hot and cold water
tanks and water pumps.
If detailed instructions for special order specifications or options not contained in this
manual are required, please contact 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.

172-65167M-01 (VA Series) 8 Jan 2003
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Safety Considerations
x Read this section carefully before use and be sure to follow the instructions.
x Installation, inspection, maintenance, repairs, disassembly, adjustment, and
valve opening/closing should be carried out only by trained maintenance
personnel.
x 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.
x 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
WARNING NEVER apply direct heat to the float.
The float may explode due to increased internal pressure, causing
accidents leading to serious injury or damage to property and
equipment.
CAUTION
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.
Use hoisting equipment for heavy objects (weighing
approximately 20 kg or more).
Failure to do so may result in back strain or other injury if the object
should fall.
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.
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.
Safety cautions continued on next page.

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CAUTION
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.
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.

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Features of the VA Air Vent
1. The vents have no hinges or levers: the only moving part is the self-leveling free
float, which eliminates concentrated wear and provides long service life.
2. The vents are made up of few parts and the construction has been kept simple,
so maintenance checks are also simple.
Operation
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
Principles of air and condensate discharge:
1. Rapid Venting of Initial Air at Startup
Gas from inside the piping is very quickly pushed out around
the float guide by liquid pressure.
2. Air Vent Closes
After venting, the float rises with the rising liquid level, closing
the valve. Once closed, the valve will not reopen, even if gas
accumulates inside the product and the liquid level drops.
3. Closed Position
When the pressure inside the piping drops to near or less
than atmospheric pressure, the float drops opening the vent.
Air is allowed to enter to facilitate the drainage of liquid from
the piping.
Air
Condensate

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Specifications
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
Model
Size
Inlet / Outlet
mm
Max. Oper.
Press. (PMO)
MPaG
Max. Oper.
Temp. (TMO)
°C
Max. Allowable
Press.* (PMA)
MPaG
Max. Allowable
Temp.* (TMA )
°C
Weight
kg
VA1 50 / 20 4.4 – 5.5
VA2 65 / 25 5.0 – 6.7
VA3 80 / 32 8.4 – 10
VA4 100 / 65 29 – 34
VA5 150 / 100
1.0 100 1.0 150
65 – 72
(1 MPa = 10.197 kg/cm2)
* Maximum allowable pressure (PMA) and maximum allowable temperature (TMA) are PRESSURE
SHELL DESIGN CONDITIONS, NOT OPERATING CONDITIONS.
NOTE: Products with special order specifications may differ from the information in the table above. For
full details, please refer to the product drawings.
Configuration
VA1 · VA2 · VA3 VA4 · VA5
No. Name No. Name No. Name
1 Body 5 Cover Bolt 8 Set Screw
2 Cover 6 Valve Seat 9 Float Guide
3 Float 7 Valve Seat Holder 10 Snap Ring
4 Cover Gasket

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Installation
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 hoisting equipment for heavy objects (weighing approximately
20 kg or more). Failure to do so may result in back strain or other injury if
the object should fall.
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, and adjustment should
be done only by trained maintenance personnel.
Note: This product is designed for rapidly venting initial gasses. If gas is expected to
accumulate in the piping during operation, use together with an automatic air vent.
1. Before installation, be sure to remove all protective seals.
2. Before installing the product, blow out the inlet piping to remove any piping
scraps, dirt and oil. Close the inlet valve after blowdown.
3. This product must be installed vertically and with the inlet at the bottom and
the outlet at the top.
4. The product should be inclined no more than 5° horizontally and front-to-back.
5. As this air vent is for the discharge of air and gas from liquid-carrying pipes, it
must not be used for the discharge of air or gas from steam spaces.
6. Install the product at a point where air and gas are likely to collect such as a
bend in the piping.
7. Install piping leading to a drainage vessel or ditch.
8. Be sure to install a valve and strainer (40 mesh or greater) at the product inlet.
Allowable angles of inclination for installation
VA1 · VA2 · VA3 VA4 · VA5

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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
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
Gasket(s): check for warping and damage
Valve Seat: check for scratches or wear
Float: check for scratches or dents
Float Guide: check for damage
Disassembly / Reassembly
NEVER apply direct heat to the float. The float may explode due to
increased internal pressure, causing accidents leading to serious injury
or damage to property and equipment.
WARNING
Use hoisting equipment for heavy objects (weighing approximately
20 kg or more). Failure to do so may result in back strain or other injury if
the object should fall.
CAUTION
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
and adjustment should be done only by trained maintenance personnel.)
Dissassembly / Reassembly Procedure
Part During Disassembly During Reassembly
Cover Bolt Remove with a socket wrench Consult the table of tightening torques
and tighten to the proper torque
Cover Lift off to remove Make sure there are no pieces of the old
gasket left on the sealing surfaces and
reattach
Cover Gasket Remove, clean sealing surfaces Replace with a new gasket
Set Screw Remove with a Philips
screwdriver
Consult the table of tightening torques
and tighten to the proper torque
Valve Seat Holder Remove; take care as it may
come with the valve seat
Attach making certain that the valve seat
in the proper position

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Dissassembly / Reassembly Procedure (Continued)
Part During Disassembly During Reassembly
Valve Seat Remove being careful not to
scratch the sealing surface
Clean or replace with new if sealing
surface is warped or damaged
Float Remove, being careful not to
scratch the polished surface
Insert, being careful not to scratch or
misshape
Snap Ring Remove with appropriate pliers Insert securely into groove
Float Guide Remove without misshaping Insert, being careful not to misshape
Torque Tightening Table
Cover Bolt Set Screw
Model Torque
N·m
Distance Across Flats
mm
Torque
N·m
Screw Head
VA1 50 17 0.2 +
VA2 50 17 0.2 +
VA3 50 17 0.2 +
VA4 80 24 0.2 +
VA5 200 36 0.2 +
1 Nm |10 kgcm
Troubleshooting
NEVER apply direct heat to the float. The float may explode due to
increased internal pressure, causing accidents leading to serious injury
or damage to property and equipment.
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
The trapped air cannot displace the water
in the piping
Correct the inlet piping
The valve seat is clogged with dirt or
foreign matter
Clean the valve seat
No air is
discharged
or discharge is
poor*
The inlet or outlet piping is clogged Clean the piping
There is a build-up of rust or scale on the
valve seat or the valve seat is damaged
Clean the valve seat or
replace with a new valve seat
The float is misshapen, dirty or has a film
build-up
Clean the float or replace with
a new float
Liquid leaks
when the vent
is closed
The installation angle of inclination is
incorrect
Correct the installation
The float is damaged or filled with liquid Replace with a new floatThe vent does
not close and
liquid is blowing The specific gravity of the liquid is outside
the specifications for this product
Select a product with suitable
specifications for the
operating conditions
* Note: Once the air vent closes, it will remain closed until internal pressure drops to near or
below atmospheric pressure. This condition may be confused with a malfunction
(blocked). If gas is expected to accumulate in the piping during operation, use together
with an automatic air vent.

172-65167M-01 (VA Series) 8 Jan 2003
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Product Warranty
1. Warranty Period
One year following product delivery.
2. Warranty Coverage
TLV CO., LTD. warrants this product to the original purchaser to be free
from defective materials and workmanship. Under this warranty, the
product will be repaired or replaced at our option, without charge for parts
or labor.
3. This product warranty will not apply to cosmetic defects, nor to any
product whose exterior has been damaged or defaced; nor does it apply in
the following cases:
x Malfunctions due to improper installation, use, handling, etc., by
other than TLV CO., LTD. authorized service representatives.
x Malfunctions due to dirt, scale, rust, etc.
x Malfunctions due to improper disassembly and reassembly, or
inadequate inspection and maintenance by other than TLV CO., LTD.
authorized service representatives.
x Malfunctions due to disasters or forces of nature.
x Accidents or malfunctions due to any other cause beyond the
control of TLV CO., LTD.
Under no circumstances will TLV CO., LTD. be liable for consequential
economic loss damage or consequential damage to property.
* * * * * * *
For Service or Technical Assistance:
Contact your representative or your regional office.
Manufacturer
CO., LTD.
881 Nagasuna, Noguchi
Kakogawa, Hyogo 675-8511 JAPAN
Tel: 81-(0)794 - 27 - 1800