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 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.
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 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* TMA
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).
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).
6. A valve and screen (40 mesh or finer) must be installed before the product inlet.
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
Tolerance Angle for Installation
55
55
Figure 1
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 Gaskets: check for warping or damage
during periodic inspections, use Valve Seat Surface: check for damage or wear
the table right to inspect the parts Float: check for deformation, damage or water inside
and replace any that are found to Guide Plate: check for deformation or damage
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 ( ") socket
16
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 (
") socket
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 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 water in
discharged the piping is not being displaced by air
or discharge
is poor
Valve seat is clogged
Inlet or outlet piping is clogged
Operating pressure exceeds the rated maximum
operating pressure
Water leaks Valve seat is damaged or clogged with dirt or
when vent is scale
closed
Float is deformed, dirty or coated with a film
Improper installation
Vent does Water is inside the float
not close
Plate is damaged
and water
Specific gravity of the liquid is not suitable for this
spurts out
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]-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 2
Procedure
During Reassembly
Coat threads with anti-seize and
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
Coat threads with anti-seize and
tighten to 15 Nm (11 lbfft)
Replace with a new gasket if warped
or damaged
( Nm 10 kgcm)
(1 Nm 10 kgcm)
Remedy
Correct the inlet piping (Inner
diameter should be at least
5
16 mm [ / "])
8
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
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. 12/2011 (T)