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Rapid Initial Air Vents
■ Application Example
• Simple construction and trouble
free operation
• Only one moving part, the free
float, eliminates concentrated wear and provides long service life
• Precision-ground float and valve seat rubber contact assures seal tightness when vent is closed
• Also functions as a vacuum
breaker
VAS
No.
Part Name
No.
Part Name
o
Body
o
Float
o
Union
o
Float Guide
o
Cap Nut
o
Snap Ring
o
Valve Seat
o
Union Gasket
o
Valve Seat Holder
o
Valve Seat Gasket
■ Rapid Initial Air Vent Operation: VA Series
_ Gas from 1 inside the piping is very quickly
pushed out around the float guide by
liquid pressure.
2After venting, the float rises with the rising liquid level, closing the valve. Once
closed, the valve will not reopen, even if gas enters the vent and the water level
drops.
3When the pressure inside the piping drops to equal to 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.
li
Automatic Air Vents
■ Application Example
• Simple construction and trouble free operation
VC2
• Only one moving part, the free float, eliminates
concentrated wear and provides long service life
• Precision-ground float and valve seat rubber contact assures seal tightness when vent is closed
• Also functions as a vacuum breaker
VS1C
• Works in lquids with low specific gravity ( p > 0.8)
• High corrosion resistance due to stainless steel body and fluorine rubber (FPM) valve seat
• Useable with high pressures and temperatures
■ Automatic Air Vent Operation: VS1C
HT
VC2
No.
Part Name
o
Body
o
Cover
o
Float
o
Valve Seat
o
Cover Gasket
Gas from inside the piping is quickly pushed
out around the float by liquid
pressure.
2After venting, the float rises with the rising liquid level,
closing the valve.
When gas flows into the vent body, the liquid level decreases.
The float drops,
opening the vent
and allowing gas discharge. When the liquid level rises after venting, the float again closes the vent.
At system shutdown, when the pressure inside the piping drops to equal to or less than atmospheric
pressure, air is
allowed to enter to facilitate the drainage of liquid from the piping.
3
4

pageCatalog pdf di En 2012-06-22-01