Vaughan Triton Series Instruction manual

FORM V453 - 1 - Rev 2, ECN 4735 10/16/20
VERTICAL WET WELL
TRITON SCREW PUMPS
INSTALLATION, OPERATION & MAINTENANCE
MANUAL
VAUGHAN CO., INC.
364 Monte Elma Road, Montesano, WA 98563
Phone: [phone] / Fax: [phone]
Toll Free Phone (US only): 1-888-249-CHOP (2467)
Web Site: www.chopperpumps.com

FORM V453 - 2 - Rev 2, ECN 4735 10/16/20
Company E-mail: [e-mail]

FORM V453 - 3 - Rev 2, ECN 4735 10/16/20
TABLE OF CONTENTS
INSTALLATION, OPERATION, and MAINTENANCE INSTRUCTIONS
1. CAUTIONS AND WARNINGS .........................................................................Page 3
2. DESCRIPTION OF VAUGHAN WET-WELL SCREW PUMP ..........................Page 5
A. Description of Major Components
B. Proper Applications for Vaughan Screw Pumps
C. Use of Vaughan Pumps that May Cause Trouble
D. Expected benefits of Vaughan Pumps
3. INSTALLATION INSTRUCTIONS ...................................................................Page 9
A. Receipt Inspection
B. Storage Considerations
C. Pump Mounting
D. Piping
E. Motors and Controls
F. Auto Oil Level Monitor
4. STARTUP INSTRUCTIONS..............................................................................Page 11
5. STARTUP & CERTIFICATION CHECKLIST ...................................................Page 12
6. NORMAL OPERATION OF PUMP ..................................................................Page 14
A. Noise
B. Vibration
C. Motor Overloads
D. Oil Usage
7. SHUTDOWN INSTRUCTIONS ........................................................................Page 14
A. Manual Shutdown
B. Automatic Shutdown
C. Emergency Shutdown
8. MAINTENANCE ...............................................................................................Page 15
A. Routine Maintenance
B. Corrective Maintenance
9. TROUBLESHOOTING .....................................................................................Page 16
10.WARRANTY.. ...................................................................................................Page 17

Form V453 - 4 - Rev 2, ECN 4735 10/16/20
SECTION 1: CAUTIONS AND WARNINGS
DANGER
Wear eye protection, rubber gloves, and
aprons when working on or inspecting this
pump. DANGER
Disconnect electrical power and lock out
and tag out circuit breakers to pump
motor and associated equipment when
inspecting or making adjustments. Duplex
pumps with alternating relays must both
be locked out; otherwise, the pump you
are working on may start as “the
alternate”. Visually confirm that the pump
has come to a complete stop before
proceeding.
DANGER
This pump may start automatically if wired
to float switches or other equipment.
Before inspecting or working on this
equipment, always isolate electrical
power. If duplex pumps are in use with an
alternating relay installed your control
panel, open circuit breaker to both
pumps. Otherwise, the pump may not be
isolated and could start automatically.
DANGER
Pump motors are connected to high
voltage. Allow only qualified electricians
to service this electrical equipment only in
accordance with the latest revision of the
National Electrical Code and other
applicable requirements.
DANGER
This equipment may not meet explosion
proof requirements for hazardous
environments unless specifically ordered
for this purpose. Introducing non-
explosion proof equipment into a
hazardous environment as defined by the
National Electrical Code can cause a
dangerous explosion.
DANGER
Keep hands, feet, and clothing away from
moving machinery.
DANGER
Do not allow people under or near the
pump assembly while it is being lifted.
DANGER
Enter tanks or pits with extreme caution
and only when using a self-contained
breathing apparatus and only when a
harness and tether is tied around your
waist. Two people should be stationed
outside the pit or tank holding onto the
harness and tether so they can pull you
out of the pit in an emergency. Consult
the confined space entry procedures that
have been recommended for your
location. Pits or tanks may contain
dangerous gases that can cause death.
DANGER
As it is possible to run Vaughan Chopper
and Screw pumps dry, for quality
assurance or troubleshooting reasons, it
is extremely important to ensure suction
and discharge connections are always
properly guarded to prevent anything (i.e.,
foreign objects or pump parts) from being
thrown from the pump as a projectile. All
pumps must be run with either a) suction
and discharge piping in place, or b) blind
flanges installed on suction and discharge
connections. Blind flanges should be
vented to avoid pressure build-up. Note
that cast rotating parts could break if
metal to metal contact occurs while the
pump is running dry.
.

Form V453 - 5 - Rev 2, ECN 4735 10/16/20
CAUTION
Never operate a screw-centrifugal pump with
closed suction or discharge valves. This will
destroy the pump and could be dangerous to
personnel.
CAUTION
This pump uses oil which if spilled can cause
a slipping hazard and danger to personnel.
CAUTION
This pump may handle dangerous or
contaminated fluids. After wear has taken
place there may be sharp corners, edges
and pinch areas which can cause serious
injury. Be careful; wear protective gloves
whenever possible. If you cut yourself, seek
medical help immediately to avoid serious
infection.
CAUTION
Lift pump and motor assembly by the lifting
eyes on the pump base only. Lifting by any
other parts of this equipment is dangerous
and may damage equipment. Do not lift
pump and motor assembly using the motor
lifting eye.
CAUTION
Lift pump and motor with properly sized and
rated lifting equipment. Consult Vaughan Co.
shipping department for weight of your
equipment if you are in doubt.
CAUTION
Do not operate this equipment unless safety
guards or devices are in place and properly
adjusted.
CAUTION
Shut pump off when adjusting fittings to
avoid being sprayed with pumpage. Pumped
materials may be hot, corrosive, poisonous,
infectious, or otherwise dangerous to
personnel.
CAUTION
Never clean, oil, or repair machinery while in
motion.
CAUTION
Keep all pit openings covered when not in
use. Open pits may contain poisonous
gases or liquids that can injure a person in
addition to the injuries from falling.
CAUTION
Make certain all personnel are clear of
equipment before operating.
CAUTION
Keep electrical control panel area clear to
avoid hazard to personnel. If a person
should trip and fall into an open panel
enclosure, serious electrical burns can
result.
If there are any questions regarding the
safe and proper methods for operating or
servicing this pump, please contact
Vaughan Company for assistance.

Form V453 - 6 - Rev 2, ECN 4735 10/16/20
DESCRIPTION OF VAUGHAN
WET-WELL SCREW PUMP
The Vaughan vertical wet-well screw pump
is specifically designed for pumping whole
solids. The pump is supplied with a deck
plate to mount the pump, automatic oil level
monitor (for pump shutdown in case of seal
failure), and a discharge flange above the
deck plate with a pressure gauge tap.
A. DESCRIPTION OF MAJOR
COMPONENTS
Note: Please use the wet-well screw pump
exploded assembly parts list as an aid in
understanding this section.
SCREW-CENTRIFUGAL IMPELLER: The
impeller on the Vaughan Triton pump
induces flow by propelling liquid material
through the pump inlet cone and into the
casing. The pumping action is a combination
of positive displacement and centrifugal
action. The OD of the impeller must be
positioned to closely clear the ID of the inlet
cone at the pump suction to achieve good
pumping efficiency. The standard impeller is
made of cast iron. Chrome-iron, 316SS, and
CD-4MCu materials are also available.
SUCTION CONE: The inlet cone serves the
function of a “wear plate”, sealing in the
pressure at the intake of the pump. The
pressure generated by the impeller is kept
inside the pump by the close clearances
between this suction cone and the impeller.
The inlet cone includes a cast-in spiral
groove to channel fiber out of the cone and
into the pump casing. This spiral groove
stops binding from overloading the drive
motor. The standard inlet suction cone is
made of ductile cast iron. Other available
materials are chrome iron, 316SS, and CD-
4MCu.
UPPER CUTTER: The upper cutter ring (it is
screwed into the pump casing with LH
threads) uses two cutting dogs to cut against
cast-in teeth located on the rotating impeller
hub. The upper cutter is only a feature on,
4X6A, 6X6A, 8X8B, 10X10C, and 12X12C
Triton screw pumps.
BACK CUTTER: Pumps that do not have an
Upper Cutter have a Back Cutter. The Back
Cutter system consists of two opposing
hardened steel insert cutters. One of the
insert cutters is stationary and located on the
back plate of the pump, while the other insert
cutter is located in the rotating impeller hub.
This feature is designed to minimize ragging
between the impeller hub and back plate.
MECHANICAL SEAL DESIGN: Standard
Vaughan wet-well pumps use a high-quality
Vaughan-designed cartridge mechanical
seal to isolate and protect the oil-bath ball
bearing system from contamination from the
pumpage. The seal is located immediately
above the pump impeller on the pump shaft.
Mechanical seal faces are made of solid
silicon carbide for long life in abrasives. The
best indication of any problems with the
mechanical seal system is either a loss of oil
from the pump stem (or column) or, in
unusual cases, overflowing of the oil
reservoir. The pump impeller pumpout vanes
are designed to pull oil out of the pump stem
if a seal failure occurs and as long as pump
discharge pressure is not too high. (If the
pump is operating near shutoff head, it's
possible to push material up into the
reservoir.)

Form V453 - 7 - Rev 2, ECN 4735 10/16/20
AUTO OIL MONITOR SYSTEM: Vaughan
Co. uses an automatic oil monitor system to
monitor oil level and to give immediate
indication of a problem if and when it occurs.
Oil is monitored by a reed switch float in the
oil reservoir located at the deck plate.
Electrical connection to this oil switch is
through a watertight Woodhead connector
mounted above the deck plate. Since the oil
switch has only a 50-watt capacity,
shutdown of pump motor (i.e., interruption of
motor starter operation) is generally
accomplished with a standard 110 VAC.
control relay, which Vaughan supplies with
the pump. If an explosion proof motor is
supplied with this pump, then an intrinsically
safe relay will be supplied so that there is no
chance of having a spark in the reed switch
in a hazardous environment. A schematic
showing a possible controls setup for the
auto oil system is shown below. Also shown
is a cross-section of the oil reservoir and
float switch.
MOTOR MOUNTING: Vaughan wet-well
pumps can be belt-driven (call Vaughan Co.
for an exploded parts assembly drawing
showing this configuration), but most pumps
are directly driven by an induction type AC
electric motor. Direct-drive pumps use a C-
Face (or metric B5) flange-mounted motor
bolted to a machined and piloted motor
stool, which in turn is mounted to the deck
plate. The pump is driven by the motor
through an elastomeric (TB Woods "Sure-
Flex or equal) coupling. The motor and
motor stool are aligned to the shaft and
pump column by machined, rabbeted fits so
that motor and pump shaft alignment is
automatically assured.
B. PROPER APPLICATIONS FOR
VAUGHAN TRITON PUMPS
Vaughan Triton Pumps are used for
pumping liquid slurries or water
contaminated with debris. These pumps
are also useful for pumping shear-
sensitive slurries which must be handled
gently by the pump. The benefit of screw-
centrifugal pumps is that debris laden

Form V453 - 8 - Rev 2, ECN 4735 10/16/20
slurries, contaminated water, or shear-
sensitive slurries may be pumped with less
power than with other types of non-clog
pumps. Vaughan Triton pumps are routinely
used to pump the following slurries:
1. Flume and wash water in food
processing plants.
2. Sewage and sewage sludges.
3. Vegetable waste.
4. Mill scale.
5. Oil sludges in oil refineries.
6. Plastic debris.
7. Coal slurry.
System design is very important in making any
pump work successfully in debris-laden slurries.
There must be enough liquid so that liquid and
material are able to flow freely to the pump. The
piping must be properly designed to be large
enough to reduce friction losses, yet small
enough to ensure sufficient velocity to keep
particles suspended.
C. USES OF VAUGHAN PUMPS THAT MAY
CAUSE TROUBLE
If the system is not designed correctly for
proper handling of your material, or if the
pump is incorrectly chosen for your system,
the pump may not work to your satisfaction or
the pump may experience early failures of
seals, bearings, or wet-end components due
to cavitation and the resulting vibration.
Vibration will damage mechanical seals and
bearings fairly quickly.
Common rules of thumb include:
1. Screw-centrifugal pumps must not ever
be operated with closed suction and
discharge valves. This will destroy the
pump and may be dangerous to
personnel.
2. A pump must be operated in the safe
portion of its pump performance curve.
Operation in the dashed lines indicates
vibration areas and must be avoided.
3. Operating a Triton pump against a
throttled discharge valve or against high
head will damage pumps.
4. Never control flow by throttling a pump
suction valve.
5. When pumping liquid containing debris
that floats or settles in a pit, mixing with
the pump may be required before pit
pumpout. This can be done by initially
directing the discharge back into the pit
using a 3-way valve system available
from Vaughan Co.
6. Slurry that is too hot cannot be pumped
from an open pit. A reasonable limit at
1170 RPM is about 180° F, at 1750 RPM
it’s about 160° F.
7. A reliable and properly sized electrical
supply must be installed for the pump to
work properly. If there is too much
voltage drop because of an undersized
cable or transformer, the motor will not
be able to provide full power to the pump
and it may stall during operation.
8. Wet-well level control can be troublesome
in solids handling applications. Some
users simply allow the pump to run
continuously, with the pump snoring a
combination of air and liquid at low pit
levels. This mode of operation can lead to
seal and bearing failures and is not
recommended. Vaughan Co. has
available a low-current shut-off system
that eliminates the need for a low-level
float switch. Do not use a throttle valve to
operate a pump at or near shutoff head at
low pit levels, as this can lead to seal
failures and broken shafts.
D. EXPECTED BENEFITS OF VAUGHAN
PUMPS
Most customers who install a Vaughan pump
see several advantages:
1. Minimal pump attention is required.
2. Excellent pumping efficiency, meaning that
the same job can be done as with other
pumps, but using less power.
3. Gentle pumping of shear sensitive slurries.
4. Long and reliable life of the Vaughan
pump.
5. Wet-well pumps use standard T-frame AC
electric motors, which are cost-effective
and relatively easy to replace compared to
special-purpose submersible motors used
on submersible pumps.
6. Wet-well pumps eliminate suction piping
and damage to submerged wires typical of
submersible pumps.

Form V453 - 9 - Rev 2, ECN 4735 10/16/20
INSTALLATION INSTRUCTIONS
A. RECEIPT INSPECTION
Prior to shipment Vaughan pumps are
carefully crated and inspected to ensure
arrival at your site in good condition. On
receiving your pump, examine it carefully to
assure that no damaged or broken parts
have resulted from shipping or handling.
Look for signs that the pump has been
dropped, such as damaged crating, missing
paint, dented-in flanges, cracked housings,
or leaking oil. Turn the pump shaft by hand
and verify that it turns over smoothly. If the
shaft binds, look for debris or paint between
impeller and suction cone. Otherwise, shaft
binding could indicate damage. If damage
has occurred, report to your carrier
immediately, and consult your local Vaughan
representative or call Vaughan Co. for
advice. Be sure to remove the flange cover
at time of installation.
B. STORAGE CONSIDERATIONS
If equipment is to be stored for longer than
two weeks, take the following action:
1. Coat exposed steel with a light layer of
grease or Cosmoline to protect the
equipment from corrosion.
2. Rotate the motor 1/4 turn once each
month to keep the bearings from sitting
in one position for extended periods of
time.
3. Avoid storing rotating equipment near
other vibrating equipment. The
vibrations can damage the ball bearings
and result in premature failure once the
equipment is started up.
4. Store rotating equipment in a clean, dry,
heated area away from areas where it
could be damaged from impact, smoke,
dirt, vibration, corrosive fumes or liquids,
or from condensation inside the motor or
pump. It may be helpful to cover
equipment with plastic.
5. The pump column and bearing housing
are assembled as an oil-filled assembly
so that the seal and lower bearings are
covered in oil. To avoid bearing
corrosion these housings should be kept
filled with ISO Grade 46 hydraulic oil to
normal levels. (Note that the top bearing
is grease lubricated. An air gap should
be left below the top two bearings. Do
not over fill.)
C. PUMP MOUNTING
The Vaughan wet-well pump is heavy and
will require a crane to lift it into position over
your pit. Lifting the pump by the lifting eyes
on the deck plate is the only recommended
method for lifting. If the pump is long, it's
advisable to support the center of the pump
column during lifting to avoid bending any of
the stem sections. Do not lift by the motor
lift eye.
When locating the pump in the pit, position
the pump so that the lower pump casing (or
volute) is located at least 12" away from the
nearest vertical wall in the pit. Pump length
should have been chosen so that the pump
inlet is located about 12" above the pit floor.
Smaller 3" and 4" pumps may be located no
closer than 6" from the floor as a minimum.
Mounting the pump intake too close to the pit
floor can cause vibrations and keep material
from getting into the pump.
The pump deck plate should be bolted or
clamped to the upper deck or floor to
minimize operational vibrations. Vaughan
Co. typically recommends ½" expansion-
type anchors for use in concrete for pumps
3-6" discharge size, ¾" anchors for 8-12"
size pumps.
The exact details of your pump, (i.e., parts
breakdown, outline dimensions, and weight)
are available from Vaughan Co. The
illustration on the next page shows a typical
wet-well pump installation.

Form V453 - 10 - Rev 2, ECN 4735 10/16/20
D. PIPING
As a general rule in piping layout, avoid
frictional losses by minimizing fittings and
abrupt changes in direction and by
choosing piping size carefully. Remember
that when pumping sludges that this
material has significantly higher friction
losses than water, so larger diameter
piping is often required. If you are going
uphill or going into a force main, or if
there is more than one pump pumping
into a common header, a check valve and
isolation valve will be required on the
discharge of each pump. Note that there
is a 1/4" NPT pressure tap above the
deck plate and just below the discharge
flange for installation of pressure gauge
for testing purposes, particularly
important at pump startup.
Also, if you are ever required to do any
troubleshooting, a pressure gauge will also
be required. Vaughan Co. does not
recommend the use of an expansion joint on
the pump discharge as this can impose large
forces onto the pump and can also cause
pump and piping vibrations by making the
discharge piping system too flexible.
E. MOTOR AND CONTROLS
Most motors provided on Vaughan pumps
are TEFC C-Face mounted and are not
designed for hazardous environments or
rated as explosion proof. However, some
applications require explosion-proof motors.
If your pump is located in a hazardous
location, be sure you ordered and received
your pump with an explosion-proof motor
and that you use an electrician experienced
in hazardous environment wiring and
controls.
Vaughan Chopper Pumps, because they cut
and condition the material they pump,
require motor protection with correctly sized
breakers, starters, and overload protection.
A Chopper Pump can jam and stall on
material too tough to chop, such as steel
rebar. Therefore, carefully chosen overload
protection for your expensive motor is critical
to avoid motor burnout. Note that nuisance
tripping during chopping can occur if you do
not have an adequately sized and adjusted
circuit breaker. The circuit breaker should
never open during chopping, it should
generally be sized for 125% of motor full
load amperage rating, and it should only
open during a short circuit, not during motor
overloads. The starter overloads should trip
out on motor overload and are typically size
for 110% of motor full load amperage rating.
If your pump and motor are located in a
hazardous environment, be sure that the
control relay used for the Auto Oil Monitor
System is an "intrinsically safe" relay. See
the next section on the Auto Oil Monitor
System Installation.
F. AUTO OIL LEVEL MONITOR
The Vaughan Automatic Oil Level Monitor
(OLM) System constantly monitors oil level
in the pump column and bearing housing
below the deck plate level. The auto OLM
system is designed to shut the pump down
whenever oil level drops below a preset
level, but to make this system work, your

Form V453 - 11 - Rev 2, ECN 4735 10/16/20
electrician must connect the OLM to your
controls. If desired, your controls can be set
up to actuate an alarm on low oil level to
alert the operators of a problem in the
mechanical seal system.
The OLM system is composed of a small
liquid level switch, mounted in the oil
reservoir, and of a control relay, mounted in
the control panel with the motor controls.
Vaughan Co. supplies both the pump-
mounted oil monitor/oil reservoir with
connectors, and the control relay with 8-pin
base for mounting in the customer's panel.
The Auto OLM system allows the pump to
operate normally as long as the oil level is at
an acceptable level in the reservoir.
However, on loss of oil, usually due to seal
damage, the oil level drops, the oil switch
then opens, the control relay in the panel
becomes de-energized, and the control relay
contacts wired in series with the pump motor
starter open up and interrupt voltage to the
starter. This sequence of events shuts down
the pump. The schematic presented earlier
in this manual illustrates how Vaughan Co.
intends this system to work.
STARTUP INSTRUCTIONS
NOTES:
1. Vaughan pumps are designed and built
for automatic alignment of motor and
pump shafts during assembly. No
further alignment is necessary.
2. Vaughan Co. uses Chevron Rando HD-
46 Hydraulic Oil in the pump column.
Other equivalent oils are: Shell Turbo
46, Texaco Regal 46, Gulf Harmony 46
and Exxon Teresstic 46. Note also that
most ISO grade 46 hydraulic oil and ISO
grade 46 turbine oils should be
compatible with the Rando HD-46 but
only a few brands have the rust
inhibitors we recommend for optimum
pump life. The pump is shipped from the
factory with oil, but once the pump is
installed in your pit, it may need
additional oil to make sure the oil
monitor switch is covered with oil.DO
NOT OVERFILL as this will wash
grease out of the upper bearings; add
only enough to cover the switch plus 1”
3. Do not completely fill the pump column
with oil. Fill only until the float switch is
covered with oil plus one additional inch.
The pump requires some air space at
the top of the pump column to avoid
over-pressurizing the system during
heat-up of the oil. The upper bearings
are grease lubricated so over-filling will
wash out the grease.
4. When performing the pump rotation
check to ensure that the pump is turning
Clockwise (as viewed from the motor
end). At the control panel, push the
"ON" button, then the "OFF" button as
fast as possible in sequence to merely
"jog" or "bump" the motor. If the motor
turns clockwise, then you are ready to
start the pump. If the motor turns
counterclockwise, (wrong direction),
then have your electrician open the
circuit breakers to the motor panel using
your plant's normal safety precautions
for locking and tagging out breakers,
and then reverse any two leads to the
motor starter in the control panel. Then
re-close the breakers to the panel and
recheck the motor direction to be sure
it's correct. If the pump is allowed to run
backwards for any significant length of
time, the impeller bolt can unwind, and
then the impeller will come loose on the
shaft and damage the pump.
5. When the STARTUP AND
CERTIFICATION CHECKLIST is
completed satisfactorily, review the
safety warnings at the beginning of this
manual and then start up the pump.
Please fill out the STARTUP AND
CERTIFICATION CHECKLIST which
follows and FAX or send a copy of it to
Vaughan Engineering. We will review
your installation to make sure the pump
is properly matched to your system to
protect your investment.

Form V453 - 12 - Rev 2, ECN 4735 10/16/20

Form V453 - 13 - Rev 2, ECN 4735 10/16/20

Form V453 - 14 - Rev 2, ECN 4735 10/16/20
NORMAL OPERATION
A. NOISE: Vaughan pumps which operate
at either 1750 RPM or 1170 RPM are
normally quiet running (<85 dbA), and the
major source of noise is the electric motor.
Higher head pumps operating at 3510
RPM, however, will be noisier due to the
nature of the pump design. Typically, noise
level will be around 90-93 dbA in this
pump. (However, mechanical vibrations
should be minimal.)
B. VIBRATION: Vibration, like noise,
should be minimal in the pump.
Please note that every effort has been
made at the factory to ensure that this
pump operates smoothly and without
vibration. For example, all impellers are
dynamically balanced after impeller
machining to less than 0.1 ounce of
imbalance. Component alignment from top
to bottom is assured by the machining
methods we use. And the pump shaft is
very tightly held by ball bearings so that
there is virtually no shaft movement.
C. MOTOR OVERLOADS: A motor
overload is not part of normal operation. If
you find that the motor has tripped out on
overload, when you restart the motor, have
an electrician check operating amps. Make
sure that the motor is not pulling more than
max. allowable full load amps as indicated
by the motor nameplate. Note especially
that repeatedly resetting the motor
overload devices and restarting the motor
when it trips out again will burn out the
motor! Please pull the pump up out of the
pit and see if something is stuck in the
pump.
D. OIL USAGE: The pump will not use oil
when the mechanical seal is in good
condition. (Perhaps after a year of
operation, one or two ounces of oil might
be required to bring oil up to the original
level at startup.) If the pump uses large
amounts of oil or if the oil is contaminated,
mechanical seal damage may have
occurred. (Verify that the pump has not
been flooded from the top.) If the seal is
leaking, the unit should be repaired
immediately to avoid more expensive
repairs later. Call Vaughan Co. immediately
for advice. Vaughan Co. can send out a
bearing and seal system sub-assembly or a
new seal overnight, if necessary, to support
your operations. Should repair be
necessary, please carefully follow the
instructions of the Wet-Well Overhaul
Manual. Because the Vaughan pump has a
unique bearing and seal design, it is
extremely difficult to repair the pump
properly if you do not have detailed
directions to follow.
In unusual circumstances, the oil in the
reservoir will become very slightly "milky" in
appearance. Generally, this happens
because condensation occurs inside the
pump column or reservoir as temperature
and weather changes. If the oil is only
slightly milky, it will not present any
problems for the pump. Obviously, if too
much water gets into the oil, the oil (or the
seal) must be changed.
E. VORTEXING AND MINIMUM
SUBMERGENCE: The water level in the
pit must be kept high enough to avoid
vortexing in the pump. The rule of thumb to
avoid vortexing is to allow one foot of
submergence above the inlet for every
foot/second of inlet velocity. Velocity
depends on flow rate and inlet diameter.
The formula to find the flow velocity at the
suction of your pump is as follows:
V (ft/s) = 0.4085*GPM / diameter2(in)
Minimum submergence requirements can
be reduced by use of suction bells which
reduce the velocity at the inlet. Please
consult Vaughan engineering regarding
applications requiring a suction bell.
SHUTDOWN INSTRUCTIONS
A. MANUAL SHUTDOWN: In the manual
mode of operation, a Vaughan pump is
shut down by hitting the "OFF" button or

Form V453 - 15 - Rev 2, ECN 4735 10/16/20
turning the auto/man/off switch to the
"OFF" position on the front panel of your
control panel. If any repair or maintenance
work is to be done on the pump, be sure to
follow all the warnings at the beginning of
this manual. Be sure to turn off electrical
power by opening the breaker at the control
panel and by following all plant safety
procedures!
B. AUTOMATIC SHUTDOWN: Automatic
operation normally shuts the pump down
for you, usually on low pit level. If the pump
does not shut down when the pit is pumped
out, the pump may be shut down manually,
but do troubleshoot your level control
system. If you are going to do any
maintenance, adjustment or inspection on
this pump or motor, be sure to follow all
warnings at the beginning of this manual.
Be sure to turn off electrical power by
opening the main panel breaker and by
following all plant safety procedures, since
in the automatic mode, the pump could
start automatically if not isolated!
C. EMERGENCY SHUTDOWN: In any
kind of emergency when the pump needs
to be shutdown, hit the manual "OFF"
switch or pushbutton on the front of the
pump control panel. If any work has to be
done on the pump or motor, open the main
breaker on the pump control panel so that
the pump cannot automatically restart
when personnel are near the pump or
motor. MAINTENANCE
A. ROUTINE MAINTENANCE
MONTHLY:
1. Check amperage draw to the pump
motor and compare to that measured at
startup. Make sure that power draw does
not exceed allowable amperage to the
motor at full load.
QUARTERLY:
1. Motor: Inspect electric motor. Make sure
that casing drain is not plugged to ensure
that motor cannot fill up with water. Clean
cooling fins so that dirt buildup will not
affect cooling ability of motor. Check for
loose hardware and damaged wiring or
conduit.
2. Pump: Inspect pump for loose
hardware. Disconnect power to the Auto
OLM and check the oil to ensure that it is
clean and at the proper level. Make sure
that pump is operating smoothly and
without vibration.
SEMI-ANNUALLY:
1. Grease motor bearings.
2. Perform quarterly inspections.
ANNUALLY:
Remove pump from the pit and inspect for
wear or damaged parts. Check impeller
clearance from suction cone. It should be
no greater than 0.030" max. Shim suction
cone closer to pump casing or replace
impeller and suction cone as required.
Check for smooth shaft rotation by rotating
the pump shaft by hand. Be especially alert
to rough spots on the bearings. Make sure
there is no axial play in the pump shaft and
that no oil is leaking across the seal faces
into the pump bowl. Inspect pump bowl for
wear and replace as necessary. Check for
loose hardware and tighten and replace as
necessary.
B. CORRECTIVE MAINTENANCE:
Because overhaul of a Vaughan pump is a
major undertaking, the Overhaul Instruction
is a separate procedure. Please do not try
to overhaul or repair the pump without this
important procedure and without the
exploded assembly parts breakdown. The
overhaul manual was sent to you by mail
when your order for the pump was placed
at the factory. If you do not have a copy of
this manual, please call Vaughan Co.
Engineering; we will make sure you get
proper instructions overnight or by email.

Form V453 - 16 - Rev 2, ECN 4735 10/16/20

Form V453 - 17 - Rev 2, ECN 4735 10/16/20
VAUGHAN CO., INC. PRODUCT WARRANTY
Vaughan Company, Inc. (Vaughan Co.) warrants to the original purchaser/end user (Purchaser) all pumps and pump parts
manufactured by Vaughan Co. to be free from defects in workmanship or material for a period of one (1) year from date of startup or
eighteen (18) months from the date of shipment from Vaughan Co., whichever occurs sooner. Startup data must be submitted to
Vaughan Co. within 30 days of startup. If Purchaser fails to submit startup data within 30 days of startup, then Vaughan, in its sole
discretion, may elect to void this warranty at any time. Purchaser must contact Vaughan Co. prior to commencing any repair attempts,
or. removing pump or parts from service. If Purchaser fails to contact Vaughan Co. prior to commencing any repair attempts or
removing pumps or parts from service, then Vaughan, in its sole discretion, may elect to void this warranty at any time.
If during said warranty period, any pump or pump parts manufactured by Vaughan Co. prove to be defective in workmanship or
material under normal use and service, and if such pump or pump parts are returned to Vaughan Co.'s factory at Montesano, WA, or to
a Vaughan authorized Service Facility, as directed by Vaughan Co., transportation charges prepaid, and if the pump or pump parts are
found to be defective in workmanship or material, they will be replaced or repaired by Vaughan Co. free of charge. Products repaired
or replaced from the Vaughan Co. factory or a Vaughan authorized Service Facility under this warranty will be returned freight
prepaid. Vaughan Co. shall not be responsible for the cost of pump or part removal and/or re-installation.
All warranty claims must be submitted in writing to Vaughan Co. not later than thirty (30) days after warranty breach occurrence. The
original warranty length shall not be extended with respect to pumps or parts repaired or replaced by Vaughan Co. under this
Warranty. This Warranty is voided as to pumps or parts repaired/replaced by other than Vaughan Co. or its duly authorized
representatives.
Vaughan Co. shall not be liable for consequential damages of any kind, including, but not limited to, claims for property damage,
personal injury, attorneys’ fees, lost profits, loss of use, liability of Purchaser to customers, loss of goodwill, interest on money
withheld by customers, damages related to third party claims, travel expenses, rented equipment, third party contractor's fees, or
unauthorized repair service or parts. The Purchaser, by acceptance of delivery, assumes all liability for the consequences of the use or
misuse of Vaughan Co. products by the Purchaser, its employees or others.
Equipment and accessories purchased by Vaughan Co. from outside sources which are incorporated into any Vaughan pump or any
pump part are warranted only to the extent of and by the original manufacturer's warranty or guarantee, if any, which warranty, if
appropriate, will be assigned by Vaughan Co. to the Purchaser. It is Purchaser’s responsibility to consult the applicable product
documentation for specific warranty information. Specific product documentation is available upon request.
Any warranty shall be void if the total contract amount is not paid in full.
Vaughan Co. neither assumes, nor authorizes any person or company to assume for it, any other obligation in connection with the sale
of its equipment with the exception of a valid Vaughan "Performance Guarantee" or "Extended Warranty," if applicable. Any other
enlargement or modification of this warranty by a representative or other selling agent shall not be legally binding on Vaughan Co.
Warranty eligibility determination is at Vaughan Co.’s sole discretion.
Warranty Limitations:
This warranty shall not apply to any pump or pump part which has been subjected to or been damaged by any of the following non-
exclusive list of causes:
•Misuse
•Abuse
•Accident
•Negligence
•Operated in the dashed portion of the
published pump curves
•Used in a manner contrary to Vaughan's
printed instructions
•Defective power supply
•Improper electrical protection
•Faulty installation, maintenance, or repair
•Wear caused by pumping abrasive or
corrosive fluids or by cavitation
•Dissatisfaction due to buyer’s remorse
•Damages incurred during transportation
•Damages incurred during installation or
maintenance
THIS IS VAUGHAN CO.'S SOLE WARRANTY AND IS IN LIEU OF ALL OTHER WARRANTIES,
EXPRESSED OR IMPLIED, WHICH ARE HEREBY EXCLUDED INCLUDING IN PARTICULAR ALL
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

Form V453 - 18 - Rev 2, ECN 4735 10/16/20
REV NUMBERS AND DATE:
REV 2, ECN 4735 Warranty Updated 10/16/20 SJM
10/14/21 Per Joe - Removed “Vaughan Co. Ships wet-well pumps with a pressure gauge
installed in this pressure tap so that you can measure the actual operating conditions of
the pump during startup”. Replaced with “for installation of pressure gauge for testing
purposes, particularly important at pump startup”. 10/14/21 LMN.