www.internationalvalve.com
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
MODEL SWG, SERIES C, B, V, N
International Valve Marketing, LLC
Page | 10
Last Revision Date: 09/13/2013
Two side ports are provided on each valve. The upper port is called the gauge port and the
lower port is called a pressure relief port. After gaining a familiarity with the pipeline conditions
and your Vent-Tech valve, these ports utilized together can serve as flushing ports to flush the
valve without requiring disassembly and re-assembly of the valve. Using the upper port as the
inlet and the lower port as the outlet, a certified system maintenance mechanic can:
Close the isolation valve and depressurize the valve.
Flush a stream of water with a maximum recommended temperature of 160o F through the
valve. In the rare occasion where temperatures above 180
o
F are beneficial, please contact
Continue flushing the valve until water runs clear
Consult local requirements for handling of pipeline emissions.
An example maintenance worksheet is included in the Addendum at the end of this manual
(d)
Troubleshooting Air Valve Problems
This
section contains a table that describes possible solutions to problems that may occur when using
your air valve. The table contains:
•
Symptoms
that describe the type of problem.
• Reasons
for the problem
•
Possible solutions
that describe what you should do to try to solve the problem.
Trouble Shooting
Symptom
Reason
Possible Solutions
Leak at Large Orifice
Debris stuck in valve
Follow enclosed Maintenance
Instructions
Leak thru Center anti-
surge orifice
Nozzle not sealed in Nozzle Float
Follow enclosed Maintenance
Instructions
Leak at Sealing Flange and
body flange
Sealing Flange not secured
Tighten Sealing Flange Fasteners
Small volumes of water
evident on top of Anti-
Surge Float or top Sealing
Flange during start-up
Normal operation of valve
No solution required
WARNING! POTENTIAL SCALDING HAZARD!
Using hot water at temperatures above 120
o
F poses the risk of personal injury if proper awareness,,
care and attention guidelines are not followed.
