2
01
Introduction
Manual 4804 Rev C p/n 004804 0000
Consult factory for alternate seal con
¿
gurations.
When the nameplate model designation is followed
by the letters “HT,” the pump has an operating
temperature limit of 220°F (104°C). Direct all
inquiries to Tuthill Vacuum & Blower Systems,
and reference the model and serial number of the
pump.
SUITABLE APPLICATIONS
Kinney Liquid Ring Vacuum Pumps (KLRC)
are reliable non-pulsating pumps. KLRC
pumps are two-stage con
¿
guration, suitable for
operation down to 30 Torr absolute/39.99 mbar
(approximately 29 inches Hg. vacuum reference
30-inch barometer), when sealed with 60°F (16°C)
water.
Standard pumps with stainless steel impellers
(designated with material codes F or C) are
suitable for operation with sealant temperatures
up to 160°F (71°C). Bronze impeller pumps
(designated with material code B) and pumps
with “HT” following the Model designation on the
nameplate are suitable for operation with sealant
temperatures up to 220°F (104°C). Consult
Tuthill Vacuum & Blower Systems for applications
requiring operations above 220°F (104°C).
AVOID DAMAGE TO THE PUMP
• Unpack the pump carefully and handle only by
methods that will not damage or misalign the
pump.
• Do not run the pump dry. Make sure sealant is
piped to both seals;
see Figure 3-1 on page
7
through
Figure 3-4 on page 10
.
• Do not allow sealant in the pump to freeze.
• Do not place any valves or restrictions in the
discharge line.
• If the pump and motor are mounted on a base,
the unit should only be lifted from the base
or by attaching to the base. Lifting the unit by
attaching to the pump or motor could disturb the
alignment. The crossover manifolding on the
KLRC Series pumps should never be used as
an attaching area for lifting.
THEORY OF OPERATION
When the pump is operating, a continuous
À
ow
of sealant liquid is entering the pump and forms
a seal between the impeller and the casing (
see
Figure 1-1 on page 2
). The impeller is offset
above the center of the pump casing and as
the impeller rotates, pumping action begins in
the space between the impeller and casing by
¿
lling and emptying similarly to a reciprocating
compressor (engine). Gas inlet and discharge ports
are positioned so as to draw gas into the cavity
inside the liquid sealed ring during the expansion
segment, and to discharge gas along with some
liquid during the compression segment.
Gas Inlet
Liquid & Gas Out
Casing
Liquid
Ring
Gas Leaving
Cavity within
Liquid Ring
Seal Liquid Inlet
Gas Entering
Cavity within
Liquid Ring
Impeller
Figure 1-1 – Cross-Section Liquid Ring Pump
The discharged liquid can be recovered and
recirculated through the use of a gas/liquid
separator.
An attenuation valve is provided to drain sealant
from the pump before starting and to bleed air into
the pump to prevent cavitation, which occurs when
the pressure is low and the air
À
ow is minimal. To
additionally protect against cavitation, an optional
air bleed valve and/or vacuum relief valve can be
installed in the suction line.
Water is normally used as a liquid seal but may be
unsuitable for some pump applications. Consult
Tuthill Vacuum & Blower Systems before changing
to a different liquid in the pump.
Summary of Contents for KLRC Series
Page 6: ...iv Table of Contents Manual 4804 Rev C p n 004804 0000 ...
Page 33: ...27 08 Reassembly Manual 4804 Rev C p n 004804 0000 Figure 8 2 Bearing Driver Tool ...
Page 34: ...28 08 Reassembly Manual 4804 Rev C p n 004804 0000 Figure 8 3 Foot Alignment Tool ...
Page 37: ...31 09 Troubleshooting Manual 4804 Rev C p n 004804 0000 NOTES ...
