TLV VS1A Instruction Manual

INSTRUCTION MANUAL
Rapid Initial Air Vent
Thank you for purchasing the
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. Before
beginning installation or maintenance, please read this manual
to ensure correct usage of the product.
This is a rapid initial air vent for quickly venting large amounts of
air at startup only. If air venting is necessary during system
operation, install an automatic air vent as well. This air vent is for the discharge of air from
water-carrying pipes. It must not be used for the discharge of air from steam spaces.
If there is a rapid rise in water level (caused by rapidly opening a shut-off valve, etc.), a
small amount of water may leak with discharged air immediately before the vent closes.
This instruction manual is needed not only for installation, but for subsequent
troubleshooting. Please keep it in a safe place for future reference.
The contents of this manual are subject to change without notice.
Once the valve closes after discharging initial air, it will not open again, even
if air accumulates inside the product, until the internal pressure drops to near
atmospheric pressure.

1. Safety Considerations

DO NOT use for toxic, flammable or otherwise hazardous fluids.
This product is an air vent that discharges air from water piping system.
WARNING
Use only for water and/or air. This product is for intended use only.
Improper use may result in such hazards as damage to the product or
malfunctions that may lead to serious accident.
NEVER apply direct heat to the float. The float may explode due to
increased internal pressure, causing accidents leading to serious injury
WARNING
or damage to property and equipment.
Install properly and DO NOT use this product outside the recommended
operating pressure, temperature and other specification ranges.
CAUTION
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.
Use only under conditions in which no freeze-up will occur. Freezing
may damage the product, leading to fluid discharge, which may cause
CAUTION
burns or other injury.
DO NOT use this product in excess of the maximum operating pressure
CAUTION
differential; such use could make discharge impossible (blocked).
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
CAUTION
the discharge of fluids.
Be sure to use only the recommended components when repairing the
product, and NEVER attempt to modify the product in any way. Failure to
CAUTION
observe these precautions may result in damage to the product or burns
or other injury due to malfunction or the discharge of fluids.
When disassembling or removing the product, wait until the internal
pressure equals atmospheric pressure and the surface of the product
CAUTION
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.
Installation, inspection, maintenance, repairs, disassembly, adjustment
CAUTION and valve opening/closing should be carried out only by trained
maintenance personnel.

2. Specifications

Refer to the product nameplate for detailed specifications.
Model
Nominal Diameter
Max. Allowable
Pressure*
Max. Allowable
Temp. (TMA)*
Max. Differential Pressure**
Max. Operating Temp.
Valve No.***
Production Lot No.
3. Configuration
No. Name
1 Body
2 Cover
3 Float
4 Valve Seat
5 Valve Seat Gasket
6 Cover Gasket
7 Cover Bolt
8 Nameplate
9 Connector
10 Screw
11 Spring Washer
12 Guide Plate
4. Proper Installation
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. This product must be installed vertically, with the inlet at the bottom and the outlet at
the top, and should be inclined within 5° horizontally and front-to-back (Figure 1).
4. Install the product in a location where air is likely to collect, such as a bend in the piping.
5. Install outlet piping leading to a drainage vessel or ditch. Make sure the end of the pipe
is above the waterline, so that dirt and water can not be sucked up by vacuum when
the system shuts down (Figure 2).
6. Make sure to take measures to prevent foreign matter from flowing into the product.
VS1A
Rapid Initial Air Vent.
* Maximum allowable pressure (PMA) and
maximum allowable temperature (TMA)
are PRESSURE SHELL DESIGN
CONDITIONS (NOT OPERATING
CONDITIONS)
** This is applicable only during the initial
discharge of air. Once the valve closes, it
will remain closed even if the differential
pressure is within this range.
*** Valve No. is displayed for products with
options. This item is omitted from the
nameplate when there are no options.
Do not use for toxic, flammable
or otherwise hazardous fluids.
For intended use only
7. Installation of an isolation valve just before the product's main connection is
recommended as it enables maintenance during operation.
Tolerance Angle for Installation
5°5°
5°5°

5. Inspection and Maintenance

Operational Check: Visual inspections should be carried out on a daily basis to
determine whether the air vent is operating properly or has failed. Periodically (at least
biannually) the operation should also be checked.
If the air vent should fail, it may cause damage to piping and equipment, resulting in
faulty or low quality product manufacture.
When parts have been removed, or during
periodic inspections, use the table right
to inspect the parts and replace any that
are found to be defective.
6. Disassembly / Reassembly
Use the following procedures to remove components. Use the same procedures in
reverse to reassemble. If drawings or other special documentation were supplied for the
product, any torque given there takes precedence over values shown here.
Part During Disassembly
11
Cover Bolt Remove with a 17 mm (
wrench
Cover Remove carefully; take care to prevent
any damage to the float, which may fall
out when the cover is removed
Float Remove, being careful not to scratch the
polished surface
Connector Remove
Cover Remove if damaged
Gasket
⁄
1
Valve Seat Remove with a 13 mm (
2
wrench
Valve Seat Remove gasket and clean sealing
Gasket surfaces
NOTE: Do not change the position of the float guides. Tight sealing
cannot be guaranteed if the float guides have been moved out of position.
Body Interior Plate (part No. 12)
The guide plate built into the body with screws (and spring washer) does not require removal
during normal product disassembly. The plate should only be replaced when it has become
deformed or damaged. Upon reassembly, tighten to 0.3 N⋅m (0.2 lbf·ft) with a phillips
screwdriver.

7. Troubleshooting

When the air vent fails to operate properly, use the following table to locate the cause.
Problem Cause
No initial air is Air is not reaching the vent because
discharged the water in the piping is not being
(blocked) or displaced by air
discharge is
The valve seat is clogged
poor
The inlet or outlet piping is clogged
Water leaks The valve seat is damaged or clogged
when vent is with dirt or scale
closed
The float is deformed, dirty or coated
with a film
Improper installation
Vent does not Water is inside the float
close and
The guide plate is damaged
water spurts
Specific gravity of the liquid is not
out
suitable for this product
8. Product Warranty
1. Warranty Period: One year following product delivery.
2. 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:
1) Malfunctions due to improper installation, use, handling, etc., by other than TLV
CO., LTD. authorized service representatives.
2) Malfunctions due to dirt, scale, rust, etc.
3) Malfunctions due to improper disassembly and reassembly, or inadequate inspection
and maintenance by other than TLV CO., LTD. authorized service representatives.
4) Malfunctions due to disasters or forces of nature.
5) Accidents or malfunctions due to any other cause beyond the control of TLV CO., LTD.
4. Under no circumstances will TLV CO., LTD. be liable for consequential economic
loss or damage or consequential damage to property.
For Service or Technical Assistance:
Contact your TLV representative or your regional TLV office.
United Kingdom: [44]-(0)1242-227223
Germany & Other European Countries: [49]-(0)7263-9150-0
North America: [1]-704-597-9070
Argentina: [54]-(0)11-4760-8401
China: [86]-(0)21-6482-8622
Malaysia: [60]-3-8065-2928
Other Countries: [81]-(0)79-427-1818
Manufacturer:
881 Nagasuna, Noguchi, Kakogawa, 675-8511 Hyogo, Japan
Tel: [81]-(0)79-422-1122
Figure 1
Procedure
Gaskets: check for warping or damage
Valve Seat Surface: check for damage or wear
Float: check for deformation, damage or water
Guide Plate: check for deformation or damage
During Reassembly
⁄
") socket Coat threads with anti-seize and
16
tighten to 45 N⋅m (44 lbf⋅ft)
Make sure the sealing surfaces are
clean, then reattach; be careful not to
bend the float guides
Place inside the body being careful
not to scratch or misshape
Reinsert into the hole in the cover
Replace with a new gasket if warped
or damaged
") socket Replace with a new valve seat if
misshapen or damaged
Coat threads with anti-seize and
tighten to 15 N⋅m (11 lbf⋅ft)
Replace with a new gasket if warped
or damaged
(1 N⋅m ≈10 kg⋅cm)
(1 N⋅m ≈10 kg⋅cm)
Remedy
Correct the inlet piping (Inner diameter
should be at least 16 mm [
Clean the valve seat
Clean piping or any upstream strainer
Clean or replace with a new valve seat
Clean or replace with a new float
Correct the installation
Replace with a new float
Replace with a new plate
Consult TLV
France: [33]-(0)4-72482222
Mexico: [52]-55-5359-7949
Australia: [61]-(0)3-9873-5610
Korea: [82]-(0)31-726-2105
Other East Asian Countries: [65]-6747-4600
Fax: [81]-(0)79-422-0112
Rev. 7/2015 (T)
Figure 2
5
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