Gorman-Rupp Pumps VG2D3-B User Manual

OM-02811-OB02ACE

September 11, 2000

INSTALLATION, OPERATION,

AND MAINTENANCE MANUAL

WITH PARTS LIST

VG SERIES PUMP

MODEL

VG2D3---B

THE GORMAN-RUPP COMPANY D MANSFIELD, OHIO

GORMAN-RUPP OF CANADA LIMITED D ST. THOMAS, ONTARIO, CANADA Printed in U.S.A.

ECopyright by the Gorman-Rupp Company

TABLE OF CONTENTS

INTRODUCTION PAGE I --- 1.................................................

WARN ING S --- S E CT I ON A PA G E A --- 1.......................................

IN STA L LAT ION --- SE CTI ON B PA G E B --- 1....................................

Pump Dimensions PAGE B --- 1.....................................................

PREINSTALLATION INSPECTION PAGE B --- 2............................................

POSITIONING PUMP PA GE B --- 2.......................................................

Lifting PA GE B --- 2.................................................................

Mounting PA GE B --- 2.............................................................

SUCTION AND DISCHARGE PIPING PAGE B --- 2.........................................

Materials PA GE B --- 2..............................................................

Line Configuration PAGE B --- 3......................................................

Connections to Pump PAGE B --- 3..................................................

Gauges PA GE B --- 3...............................................................

SUCTION LINES PAGE B --- 3...........................................................

Fittings PA GE B --- 3...............................................................

Strainers PA GE B --- 3..............................................................

Sealing PAGE B --- 3...............................................................

Suction Lines In Sumps PAGE B --- 3.................................................

Suction Line Positioning PAGE B --- 4................................................

DISCHARGE LINES PA GE B --- 4........................................................

Siphoning PA GE B --- 4.............................................................

Valves PA GE B --- 4................................................................

ALIGNMENT PAGE B --- 5..............................................................

Coupled Drives PA GE B --- 5........................................................

V --- Belt Drives PA GE B --- 6.........................................................

OPER AT IO N --- SE CT I ON C PA G E C --- 1......................................

PRIMING PA GE C --- 1.................................................................

Hand Primers PAGE C --- 1..........................................................

Exhaust Primers PAGE C --- 1.......................................................

Auxiliary Ejectors PAGE C --- 2.......................................................

Vacuum Pumps PAGE C --- 2........................................................

STARTING PA GE C --- 2................................................................

Rotation PA GE C --- 2..............................................................

OPERATION PAGE C --- 2..............................................................

Leakage PAGE C --- 2..............................................................

Liquid Temperature And Overheating PAGE C --- 2.....................................

Strainer Check PAGE C --- 3.........................................................

Pump Vacuum Check PAGE C --- 3..................................................

STOPPING PA GE C --- 3................................................................

Cold Weather Preservation PAGE C --- 3..............................................

BEARING TEMPERATURE CHECK PAGE C --- 3..........................................

TR OUB LES HOO TI NG --- S ECT ION D PA G E D --- 1..............................

PREVENTIVE MAINTENANCE PAGE D --- 3...............................................

i

TABLE OF CONTENTS

(continued)

PUMP MAINTENANCE AND REPAIR --- SECTION E PAGE E --- 1................

STANDARD PERFORMANCE CURVE PAGE E --- 1........................................

PARTS LIST:

Pump Model V G2D3 --- B PA GE E --- 3.................................................

PUMP AND SEAL DISASSEMBLY AND REAS SEMBLY PAGE E --- 4.........................

Impeller Removal P AGE E -- - 4......................................................

Seal Removal PA GE E --- 4..........................................................

Shaft And Bearing Removal And Disassembly PAGE E --- 5.............................

Shaft And Bearing Reassembly And Installation P AGE E -- - 6............................

Seal Reassembly and Installation P AGE E -- - 7........................................

Impeller Installation P AGE E -- - 8.....................................................

Final Pump Assembly PAGE E --- 8..................................................

LUBRICATION PA GE E --- 8.............................................................

Seal Assembly PAGE E --- 8.........................................................

Bearings PAGE E --- 8..............................................................

Power Source PAGE E --- 9.........................................................

ii

VG SERIES OM--02811

INTRODUCTION

This Installation, Operation, and Maintenance
manual is designed to help you achieve the best
performance and longest life from your Gorman­Rupp pump.

This pump is a VG Series, enclosed impeller, cen­trifugal model with straight-in suction without a

If there are anyquestions regarding the pump or its applicationwhich are n ot covered in this manual or in
other literature accompanying this unit, please contact your Gorman-Rupp distributor, or write:

The Gorman-Rupp Company or Gorman-Rupp of Canada Limited
P.O. Box 1217 70 Burwell Road
Mansfield, Ohio 44901--1217 St. Thomas, Ontario N5P 3R7

Forinformation ortechnicalassistanceon thepowersource,contact thepowersource manufacturer’s local
dealer or representative.

The following are used t o alert maintenance personnel to procedures which require special attention, to
those which could damage equipment, and to those which could be dangerous to personnel:

suction check valve. The pump is designed for
high pressure distribution of liquids containing
specified entrained solids. The basic material of
construction for wetted parts is gray iron. Be sure
the liquid being pumped is compatible with this
material.

Immediate hazards whichWILL resultin
severe personal injury or death. These
instructions describe the procedure re­quired and the injury which will result
from failure to follow the procedure.

Hazards or unsafe practices which
COULDresult in severe personal injury
or death. These instructions describe
the procedure required and the injury
which could result fromfailure to follow
the procedure.

HazardsorunsafepracticeswhichCOULD
result in minor personal injury or product
or property damage. These instructions
describe the requirements and the possi­ble damagewhich could result from failure
to follow the procedure.

NOTE

Instructions to aid in installation, operation, and
maintenance or which clarify a procedure.

PAGE I -- 1INTRODUCTION

VG SERIES OM--02811

SAFETY --- SECTION A

These warnings apply to the VG Series
basic pumps. Gorman-Rupp has no
control over or particular knowledge of
the power source which will be used.
Refer to the manual accompanying the
power source before attempting to be­gin operation.

Beforeattempting toopenorservic e the
pump:

1. Familiarize yourself with thisman­ual.

2. Disconnect or lock out the power
sourcetoensurethatthe pumpwill
remain inoperative.

3. Allow the pump tocompletelycool
if overheated.

4. Check the temperature before
opening any covers, plates, or
plugs.

5. Close the suction and discharge
valves.

6. Vent the pump slowly and cau­tiously.

7. Drain the pump.

Thispump isdesignedto handleliquids
containing specified entrained solids.
Do not attempt to p ump volatile, corro­sive, or flammable materials whichmay
damage the pump or endanger person­nel as a result of pump failure.

Do not operate the pump without the
guards in place over the rotating parts.
Exposed rotating parts can catch cloth­ing, fingers,or tools,causing severe in­jury to personnel.

Do not operate the pump against a
closeddischarge valveforlong periods
oftime.Ifoperatedagainstacloseddis­charge valve, pump components will
deteriorate, and the liquid could come
to a boil, build pressure, and cause the
pump casing to rupture or explode.

Use lifting and moving equipment in
good repair and with adequate capacity
topreventinjuriesto personnel or dam­age to equipment. Suction and dis­charge hoses and piping must be re­moved from the pump before lifting.

After the pump has been positioned,
make certain that the pump and all pip­ing connecti ons are tight, properly sup­ported and secure before operation.

Do not remove plates, covers, gauges,
pipe plugs, or fittings from an over­heated pump. Vaporpressure within the
pump can cause parts being disen­gagedto be ejected withgreatforce.Al­lowthe pump to completely cool be fore
servicing.

PAGE A -- 1SAFETY

INSTALLATION --- SECTION B

OM--02811VG SERIES

Review all SAFETY information in Section A.

Since pump installations areseldom identical,this
section offers only general recommendations and
practices required to inspect, position, and ar­range the pump and piping.

Most of the information pertains to a standard

static lift application where the pump is posi­tionedabovethefreelevelofliquidtobepumped.

If installed in aflooded suction applicationwhere
the liquidis supplied to the pump under pressure,
some of the information such as mounting, line
configuration, and priming must be tailored to the

OUTLINE DRAWING

specific application. Since the pressure supplied
to the pump is critical to performance and safety,
be sure to limit the incoming pressure to 50% of
the maximum permissible operating pressure as
shown on the pump performance curve.

Forfurtherassistance,contact yourGorman-Rupp
distributor or t he Gorman-Rupp Company.

Pump Dimensions

SeeFigure1fortheapproximatephysicaldimen­sionsofthispump.

Figure 1. Pump Model VG2D3--B

PAGE B -- 1INSTALLATION

OM--02811 VG SERIES

PREINSTALLATION INSPECTION

Thepump assembly wasinspected and tested be­fore shipment from the factory. Before installation,
inspect the pump fordamage which may have oc­curred during shipment. Check as follows:

a. Inspect thepump forcracks,dents,damaged

threads, and other obvious damage.

b. Check for and tighten loose attaching hard-

ware. Since gaskets tend to shrink after dry­ing, check for loose hardware at mating sur­faces.

c. Carefullyread all warnings and cautions con-

tained in this manual or affixed to the pump,
and perform all duties indicated. Note the di­rection of rotation indicated on the pump.
Check that the pump shaft rotates counter­clockwise when facing the pump suction.

POSITIONING PUMP

Lifting

Useliftingequipment w ith a capacityofatleast540
pounds (245 kg). This pump weighs approxi-

mately 108 pounds (48,9 kg), not including the
weight of accessories and base. Customer in­stalled equipment such as suction and discharge
piping must be removed before attempting to lift.

Thepumpassemblycanbeseriously
damagedif thecablesor chainsused tolift
andmovetheunitareimproperlywrapped
around the pump.

Mounting

Only operate this pump in the direction in­dicated by the arrow on the pump body
and on the accompanying decal. Refer to
ROTATION in OPERATION,SectionC.

d. Check all lubricantlevels and lubricate as ne-

cessary.RefertoLUBRICATIONin the MAIN-
TENANCE AND REPAIR section of this man­ual and perform duties as instructed.

e.Ifthepumpandpowersourcehavebeen

stored for more than 12 months, some of the
components or lubricants may have ex­ceeded their maximum shelf life. These must
be inspected or replaced to ensure maxi­mum pump service.

Locatethepumpinanaccessibleplaceascloseas
practicalto the liquid being pumped. Levelmount­ing is essential for proper operation.

The pump may have to be supported or shimmed
to provide for level operation or to eliminate vibra­tion.

SUCTION AND DISCHARGE PIPING

Thesizeofthesystempipingisnot always deter­mined by the nominal suction and discharge port
diameter. Factors such as suction lift, discharge
elevation,and friction losses for the complete sys­tem must be considered to be sure your a pplica­tionallowsthe pump tooperate withinthe safe op­eratingrange shown onpage E-1. In any case, the
suctionlineshouldneverbe smallerthanthepump
inlet.

Materials

If the maximum shelf life has been exceeded, or if
anything appears to be abnormal, contact your
Gorman-Rupp distributor or the factory to deter­mine the repair or updating policy. Do not put the
pump into service until appropriate action has
been taken.

PAGE B -- 2 INSTALLATION

Either pipe or hose maybe used for suction and
discharge lines; however, the materials must be
compatiblewiththeliquidbeingpumped.If hose is
used in suction lines, it must be the rigid-wall, rein­forced type to prevent collapse under suction. Us-

OM--02811VG SERIES

ing piping couplings in suction lines is not recom­mended.

Line Configuration

Keep suction and discharge lines as straight as
possible to minimize friction losses. Make mini­mum use of elbows and fittings, which substan­tiallyincreasefrictionloss.Ifelbowsarenecessary,
use the long-radius type to minimize friction loss.

Connections to Pump

Before tightening a connecting flange, align it ex­actlywith the pump port. Never pulla pipe line into
place by tightening the flange bolts and/or cou­plings.

Lines near the pump must be independently sup­ported to avoid strain on the pump which could
cause excessive vibration, decreased bearing life,
and increased shaft and seal wear. I f hose-type
linesareused, theyshouldhaveadequatesupport
to secure them when filled with liquid and under
pressure.

should be the eccentric type, and should be in­stalledwith the flat part ofthe reducers uppermost
to avoid creating air pockets. Valves are not nor­mally used in suction lines, but if a valve is used,
install it with the stem horizontalto avoid air pock ­ets.

Strainers

If a strainer is furnished with the pump, be certain
touseit; any sphericalsolidswhichpass througha
strainer furnished with the pump will also pass
through the pump itself.

If a strainer is not furnished with the pump, but is
installed by the pump user, make certain that the
total area of the openings in the strainer is at least
three or four times the crosssection of the suction
line,and that the openings will not permit passage
of solids larger than the solids handling capability
of the pump.

Thispumpisdesignedtohandleupto3/8 inch(9,5
mm) diameter spherical solids.

Sealing

Gauges

Most pumps are drilled and tapped for installing
dischargepressureandvacuumsuctiongauges.If
these gauges are desired for pumps that are not
tapped, drill and tap the suction and discharge
lines not less than 18 inches (457,2 mm) from the
suction and discharge ports and install the lines.
Installationcloserto the pump may result in erratic
readings.

SUCTION LINES

To avoid airpockets whichcouldaffect pumpprim­ing, the suction line must be as short and direct as
possible.Whenoperationinvolvesasuctionlift,the
line must always slope upward to the pump from
the source of the liquid being pumped; if the line
slopes down to the pump at any point along the
suction run, air pockets will be created.

Fittings

Suction lines should bethesame sizeas thepump
inlet. If reducers are used in suction lines, they

Since even a slight leak will affect priming, head,
and capacity, especially when operating with a
high suction lift, all connections in the suction line
should be sealed with pipe dope to ensure an air­tight seal. Follow the sealant manufacturer’s rec­ommendations when selecting and applying the
pipe dope. The pipe dope should be compatible
with the liquid being pumped.

Suction Lines In Sumps

If a single suction line is installed in a sump, it
should be positioned away from the wall of the
sumpat a distanceequal to 1 1/2 times the diame­ter of the suction line.

If there is a liquid flow from an open pipe into the
sump, the flow should be kept away from the suc­tioninlet because the inflowwill carry air down into
the sump, and air entering the suction line will re­duce pump efficiency.

Ifit is necessary to position inflowclose to the suc­tioninlet,installa bafflebetween theinflowand the
suction inlet at a distance 1 1/2 times the diameter

PAGE B -- 3INSTALLATION

OM--02811 VG SERIES

of the suction pipe. The baffle will allow entrained
air to escape from the liquid before it is drawn into
the suction inlet.

If two suction lines are installed in a single sump,
theflowpaths mayinteract, reducing theefficiency
of one or both pumps. To avoid this, position the
suction inlets s o that they are separated by a dis­tance equal to at least 3 times the diameter of the
suction pipe.

Suction Line Positioning

The depth of submergence of the suction line is

critical to efficient pump operation. Figure 2 shows
recommended minimum submergence vs. veloc­ity.

NOTE

The pipe submergence required may be reduced
by installinga standardpipe increaser fitting at the
endof thesuction line. The largeropening size will
reduce the inlet velocity. Calculate the required
submergence using the following formula based
on the increased opening size (area or diameter).

Figure 2. Recommended Minimum Suction Line Submergence vs. Velocity

DISCHARGE LINES

Siphoning

Donot terminate the discharge lineat a level lower
than that of the liquid being pumped unless a si­phon breaker is used in the line. Otherwise, a si ­phoning action causing damage to the pump
could result.

PAGE B -- 4 INSTALLATION

Valves

A check valvein the discharge lineis normallyrec­ommended, but it is not necessary in low dis­charge head applications.

If a throttling valve is desired in the discharge line,
useavalveaslargeasthelargestpipetominimize
friction losses. Never install a throttling valve in a
suction line.

Withhighdischargeheads,itisrecommendedthat
a throttling valve and a system check valve be in-