
DEKKER Vacuum Technologies, Inc. – HullVac / September 2016
18
11
Test the pump for ultimate vacuum at the vacuum
inlet port. A vacuum gauge should then be
mounted to the vacuum break valve. Testing
should be accomplished before the pump is
permanently connected. This procedure will
establish a ‘benchmark’ for future reference. After
running for a few minutes, or until warmed up,
the pump should reach an ultimate pressure of 50
microns of mercury or less on a thermocouple or
equivalent type of vacuum gauge. If a Bourdon
type of vacuum gauge is used, it should read close
to 30 inches of vacuum.
12
After 15-30 minutes of operation, check pump
operating temperature, which should be in the
140-160°F range at the solenoid body. The casing
temperature will rise faster and be higher at
higher suction pressures. During any operation,
the casing should not rise above 180°F.