Manual 1808 Rev B p/n 001808 0000
10
05
Installation
DIRECT DRIVE
Mounted the pump on a at and level surface. If
the pump is to be installed outdoors, ensure the
motor, painting, peripheral equipment, parts, etc.,
are suitable for outdoor operation. Allow enough
space around the pump for safe maintenance
work and periodic inspections. This includes, at
a minimum, the ability to access oil ll and drain
locations and to view the oil level sight glass.
The KD series Drive-Drive models are direct driven
by two methods:
• 8 pole (KD50) or 12 pole (KD30) motors
• Gear reducer driven by 2 or 4 pole motor
If the pump was purchased directly from Tuthill,
the coupling has been factory-aligned and tested.
When installing the pump alone to be direct-
coupled to a motor or gear drive, ensure the
coupling alignment meets the manufacturer’s
recommendations to avoid excessive loading of the
pump or motor bearings.
DISCHARGE PIPING
It may be desirable to connect discharge piping
from the oil separator to the outside to dispose
of exhaust gases and vapors. See Figure 5-2 on
page 10. When connecting discharge piping,
place a dropout trap adjacent to the oil separator
to trap the condensate, which would otherwise
drain back into the oil. If the condensate is water,
drain it as necessary to prevent it from owing
back into the reservoir. A exible connector, such
as a rubber hose, at the discharge of the pump
is necessary to make the piping exible and to
provide a convenient disconnect point for servicing.
Turned down the outside end of the discharge line
to prevent entry of precipitation.
Figure 5-2 – Typical Manifold Arrangement
INLET PIPING
Size and design the inlet piping with three
objectives in mind:
• To prevent undue gas ow restriction
• To prevent pump uids from splashing into the
process chamber
• To protect the pump from injection of particulate
matter
Tuthill recommends that the vacuum piping to the
pump inlet be as large in diameter and as short
in length as possible and no smaller in diameter
than the pump inlet. See Figure 5-2 on page
10 for recommended arrangement of vacuum
manifolding.
As with all rotary mechanical pumps, it is
necessary to install a exible member in
the suction manifold of the pump to avoid
alignment problems and to reduce the possibility
of transmitting vibration to and from other
components. Self-supporting, bellows-type, exible
connectors are recommended and are available
from Tuthill Vacuum & Blower. Use a connector be
exible enough to prevent vibration transmission
and yet rigid enough to prevent collapsing under
high vacuum.
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