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4. Proper Installation
CAUTION
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 within the limits of inclination, with the inlet at the
bottom and the outlet at the top, as shown below (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 the vacuum formed
when the system shuts down (Figure 2).
6. Be sure to install a valve and strainer (40 mesh or finer) at the product inlet.
7. (Especially for VC2) For the inlet connection, use a pipe/fitting, etc. with an inner diameter of
at least 16 mm (
5
/
15 mm (
1
"). A smaller pipe may prevent water/air displacement (Figure 3).
2
5˚
5˚
Figure 1
5. Inspection and Maintenance
Visual inspections should be carried out periodically to determine whether the automatic air
vent is operating properly or has failed. Operational inspections should be performed at least
twice per year, or as called for by the air vent operating conditions. Air vent failure may result in
damage to piping and equipment, resulting in faulty or low quality product manufacture.
WARNING
CAUTION
Gaskets
Valve Seat Surface
Float
Installation, inspection, maintenance, repairs, disassembly, adjustment
●
and valve opening/closing should be carried out only by trained
maintenance personnel.
Take measures to prevent people from coming into direct contact with
●
product outlets.
Install for use under conditions in which no freeze-up will occur.
●
Install for use under conditions in which no water hammer will occur.
●
/
"), such as a schedule 40 pipe or pipe nipple with a nominal diameter of
8
Figure 2
• NEVER apply direct heat to the float. The float may explode due to
increased internal pressure, causing accidents leading to serious injury or
property and equipment damage.
• Installation, inspection, maintenance, repairs, disassembly, adjustment
and valve opening/closing should be carried out only by trained
maintenance personnel.
• Before attempting to open the air vent, close the inlet valve and wait until
the body has cooled completely. Failure to do so may result in burns.
• Be sure to use the proper components and NEVER attempt to modify the
product.
• If using a vice when dismantling the air vent, screw a nipple or pipe end
into the inlet to prevent deformation of the threaded connection.
Parts Inspection Procedure
Check for warping or damage
Check for scratches or wear
Check for deformation, damage, oil film or liquid inside
̶ 7 ̶
/
min. 16 mm (
5
")
8
Figure 3
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