19
06
Operation
Manual 1843 Rev B p/n 001843 0000
6. Adjust the gas ballast.
See Gas Ballast on
page 19
. *The small gas ballast valve
can be set to quiet the pump during blank-
off conditions and left open if an ultimate
vacuum of 0.05 - 0.10 Torr (0.7 – 0.13 mbar) is
acceptable.
7. Run the pump at blank-off for 5-10 minutes
and then with full gas ballast for 10-15 minutes
before opening the suction of the pump to the
process by opening the inlet isolation valve.
PUMP SHUTDOWN
Rapid reversal will result in premature failure.
KT-series pumps must be properly vented
during shut down to ensure normal startup
conditions.
1. Close the inlet isolation valve.
2. Open the vent (air admittance) valve while
the pump is still operating. If the vent valve
is not available, use the large gas ballast ball
valve. Please note that the vent valve must
be opened for at least 10 seconds before
removing power from the pump. This will allow
the majority of the oil in the pumping chamber
to be transferred into the oil separator housing
so it will not cause resistance to the internals
on the next start-up.
3. Close the large gas ballast valve.
4. Stop the pump.
5. Shut off cooling water.
6. Close the vent valve.
HANDLING LARGE QUANTITIES OF
WATER
Use of the gas ballast valve enables Kinney pumps
to handle small to moderate amounts of water and
other vapors in the suction gas stream.
See Gas
Ballast on page 19
.
For applications where the vapor load exceeds
that which can be handled by the gas ballast valve,
consult Tuthill Vacuum & Blower Systems about
vapor handling systems, which can usually be
retrofitted to existing pumps.
In the KT500 and KT850 pumps, the coalescing
mesh pad (item 96), located in the oil separator
tank, can cause water build-up in applications
where large amounts of water are being handled.
Removing the mesh pad may allow water to more
easily pass from the oil. Access the mesh pad by
removing the separator housing cover.
KT Series pumps can accumulate 0.75 - 2.5 gal
(2.8 - 9.5 L) of water (depending on the model) in
the reservoir before the water level reaches the
oil line pickup where it could circulate through the
pump. If water or other condensate collects in the
oil reservoir, it should be drained before the level
reaches the oil line pickup. To drain water from the
pump, crack the oil drain valve and leave it open
until any free water accumulation has drained out.
Drain the water as often as necessary. Never shut
down the KT pump if oil is wet with water since it
can separate out and cause damage on startup.
Always clean up the oil by blanking-off the inlet of
the pump and using full-open gas ballast to remove
water vapor and condensates before shutting
down.
GAS BALLAST
The gas ballast valve is shown in
Figure 4-1 on
page 6
of this manual. Gas ballast is used
while the pump is running to prevent internal
condensation of oil-insoluble vapors such as water,
alcohol, or acetone, and to quiet the pump when
running at blank-off conditions.