TLV VS1C Instruction Manual

INSTRUCTION MANUAL
Automatic Air Vent
Thank you for purchasing the Automatic 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. Before beginning installation or maintenance,
please read this manual to ensure correct usage of the
product.
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 liquid level (caused by rapidly opening a shut-off valve, etc.), a
small amount of liquid 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.
1. Safety Considerations
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 and
CAUTION 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
Maximum Allowable Pressure*
Max. Allowable Temperature*
Maximum Differential Pressure
Max. Operating Temperature
Valve No.**
Serial Number
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 as shown right
(Figure 1).
Tolerance Angle for Installation
5° 5° 5° 5°
VS1C
* Maximum allowable pressure
(PMA) and maximum
allowable temperature (TMA)
are PRESSURE SHELL
DESIGN CONDITIONS (NOT
OPERATING CONDITIONS)
** 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
Figure 1 Figure 2
4. Install the product in a location where air is likely to collect, such as a bend in the
piping.
Install outlet piping leading to a drainage vessel or ditch. Make sure the end of the
5.
pipe is above the waterline, so that dirt and water can not be sucked up by vacuum
when the system shuts down (Figure 2).
A valve and screen (40 mesh or finer) must be installed before the product inlet.
6.
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 Gaskets: check for warping or damage
removed, or during periodic
Valve Seat Surface: check for damage or wear
inspections, use the table
Float: check for deformation, damage or fluid inside
right to inspect the parts and
Plate: check for deformation or damage
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 (
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 washers) 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 air is Air is not reaching the vent because the liquid
discharged in the piping is not being displaced by air
or
discharge
Valve seat is clogged
is poor
Inlet or outlet piping is clogged
Operating pressure exceeds the rated
maximum operating pressure
Liquid Valve seat is damaged or clogged with dirt or
leaks when scale
vent is
Float is deformed, dirty or coated with a film
closed
Improper installation
Vent does Liquid is inside the float
not close
Plate is damaged
and liquid
Specific gravity of the liquid is not suitable for
spurts out
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
China: [86]-21-6482-8622
Korea: [82]-(0)31-726-2105
Other East Asian Countries: [65]-6747-4600 Other Countries: [81]-(0)79-427-1818
Manufacturer:
881 Nagasuna, Noguchi, Kakogawa, 675-8511 Hyogo, Japan
Tel: [81]-(0)79-422-1122
Procedure
During Reassembly
⁄
") socket Coat threads with anti-seize and
16
tighten to 45 N⋅m (33 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
Insert into hole in cover
Replace with a new gasket if
warped or damaged
") socket Coat threads with anti-seize and
2
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
Replace with product of
suitable operating pressure
Clean or replace with new
valve seat
Clean or replace float
Correct the installation
Replace with new float
Replace with new plate
Consult TLV
France: [33]-(0)4-72482222
Argentina: [54]-(0)11-5197-7274
Australia: [61]-(0)3-9873-5610
Malaysia: [60]-3-5632-7988
Fax: [81]-(0)79-422-0112
Rev. 7/2008 (T)
5
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