GORMAN-RUPP GHS Series User manual

OM-04707-04
December 10, 2020
GORMAN‐RUPP PUMPS
www.grpumps.com
2020 Gorman‐Rupp Pumps Printed in U.S.A.
INSTALLATION, OPERATION,
AND MAINTENANCE MANUAL
ROTARY GEAR PUMPS
MODELS
GHS SERIES FLEXIBLE SEAL
T SIZE
PUMPS

Register your new
Gorman‐Rupp pump online at
www.grpumps.com
Valid serial number and e‐mail address required.
RECORD YOUR PUMP MODEL AND SERIAL NUMBER
Please record your pump model and serial number in the
spaces provided below. Your Gorman‐Rupp distributor
needs this information when you require parts or service.
Pump Model:
Serial Number:

TABLE OF CONTENTS
i
INTRODUCTION PAGE I - 1...................................................
SAFETY - SECTION A PAGE A - 1............................................
INSTALLATION - SECTION B PAGE B - 1.....................................
PUMP MODEL DESIGNATION PAGE B-1..................................................
PREINSTALLATION INSPECTION PAGE B-2................................................
STORAGE PAGE B-2....................................................................
Flushing PAGE B-2..................................................................
PUMP INSTALLATION PAGE B-3..........................................................
Maximum Operating Parameters PAGE B-3.............................................
Lifting PAGE B-3.....................................................................
Positioning The Pump PAGE B-3......................................................
Mounting PAGE B-3.................................................................
Piping PAGE B-3....................................................................
Gauges PAGE B-4...................................................................
Strainers PAGE B-4..................................................................
Sealing PAGE B-4...................................................................
Valves PAGE B-4....................................................................
Barrier Liquids for 65E Cartridge Triple Lipseal PAGE B-5.................................
Barrier Liquids for Dual Seals PAGE B-5................................................
ALIGNMENT PAGE B-5..................................................................
Coupled Drives PAGE B-5............................................................
V‐Belt Drives PAGE B-6...............................................................
V‐BELT TENSIONING PAGE B-6..........................................................
General Rules of Tensioning PAGE B-6.................................................
Tension Measurement PAGE B-6......................................................
ELECTRICAL CONNECTIONS PAGE B-9...................................................
OPERATION - SECTION C PAGE C - 1.......................................
PUMP OPERATION PAGE C-1............................................................
PRE‐OPERATION PAGE C-1..............................................................
Before Starting the Pump PAGE C-1...................................................
Checking Pump Rotation PAGE C-1...................................................
STARTING PAGE C-2....................................................................
OPERATION PAGE C-2..................................................................
Liquid Temperature PAGE C-2.........................................................
Overheating PAGE C-2...............................................................
Checking Gauges PAGE C-2..........................................................
Strainer Check PAGE C-2.............................................................
Leakage PAGE C-3..................................................................
PRESSURE RELIEF VALVE ADJUSTMENT PAGE C-3........................................
Cracking Pressure PAGE C-3.........................................................
Complete By‐Pass Pressure PAGE C-3.................................................
STOPPING PAGE C-3....................................................................
TROUBLESHOOTING - SECTION D PAGE D - 1...............................
PREVENTIVE MAINTENANCE PAGE D-4...............................................
PUMP MAINTENANCE AND REPAIR - SECTION E PAGE E - 1.................
TYPICAL GHS T PUMP MODEL ILLUSTRATION PAGE E-2...................................

TABLE OF CONTENTS
(continued)
ii
PARTS KEY:
Typical GHS T Pump Model PAGE E-3.................................................
PUMP DISASSEMBLY AND REASSEMBLY PAGE E-4........................................
PUMP DISASSEMBLY PAGE E-5..........................................................
Preparing for Disassembly PAGE E-5..................................................
Pressure Relief Valve (10) PAGE E-5...................................................
Optional Head Jacket (T Size Pumps) PAGE E-5........................................
Rotor Adjusting Sleeve (07) PAGE E-5.................................................
Coverplate Kit (11) PAGE E-6.........................................................
Head/Idler Kit (01 and 02) PAGE E-6...................................................
Seal Removal (05) PAGE E-7..........................................................
Rotor/Shaft Removal (03) PAGE E-7...................................................
Backhead Kit Removal (06) PAGE E-7..................................................
PUMP REASSEMBLY PAGE E-7..........................................................
Cleaning and Inspection PAGE E-7....................................................
Bushing Preparation PAGE E-8........................................................
Backhead Kit (06) PAGE E-8..........................................................
Rotor/Shaft Assembly (03) PAGE E-8..................................................
Seal Installation (05) PAGE E-8........................................................
Head/Idler Kit (01 and 02) PAGE E-8...................................................
Coverplate Kit (11) PAGE E-9.........................................................
Rotor Adjusting Sleeve (07) PAGE E-9.................................................
SETTING END CLEARANCE PAGE E-9....................................................
RELIEF VALVE DISASSEMBLY (T Hydraulic Size Only) PAGE E-10............................
RELIEF VALVE REASSEMBLY (T Hydraulic Size Only) PAGE E-11.............................
RELIEF VALVE (10) INSTALLATION PAGE E-11.............................................
SEAL APPENDIX - SECTION F PAGE F-1.....................................
Standard Friction Drive (And Optional 60A, 60B And 61J) Mechanical Seals PAGE F-1...........
Optional 60D Positive Drive Mechanical Seal PAGE F-4.......................................
Standard Packing Seal PAGE F-7..........................................................
O‐RING APPENDIX - SECTION G PAGE G-1..................................
O‐Ring Information Chart PAGE G-1.......................................................

GHS SERIES OM-04707
PAGE I - 1INTRODUCTION
INTRODUCTION
Thank You for purchasing a Gorman‐Rupp pump.
Read this manual carefully to learn how to safely
install and operate your pump. Failure to do so
could result in personal injury or damage to the
pump.
Because pump installations are seldom identical,
this manual cannot possibly provide detailed in
structions and precautions for every aspect of
each specific application. Therefore, it is the re
sponsibility of the owner/installer of the pump to
ensure that applications not addressed in this
manual are performed only after establishing that
neither operator safety nor pump integrity are com
promised by the installation. Pumps and related
equipment must be installed and operated ac
cording to all national, local and industry stan
dards.
If there are any questions regarding the pump or
its application which are not covered in this man
ual or in other literature accompanying this unit,
please contact your Gorman‐Rupp distributor, or
The Gorman‐Rupp Company:
The Gorman‐Rupp Company
P.O. Box 1217
Mansfield, Ohio 44901-1217
Phone: [phone]
or:
Gorman‐Rupp of Canada Limited
70 Burwell Road
St. Thomas, Ontario N5P 3R7
Phone: [phone]
For information or technical assistance on the
power source, contact the power source manufac
turer's local dealer or representative.
HAZARD AND INSTRUCTION
DEFINITIONS
The following are used to alert maintenance per
sonnel to procedures which require special atten
tion, to those which could damage equipment, and
to those which could be dangerous to personnel:
Immediate hazards which WILL result in
severe personal injury or death. These
instructions describe the procedure re
quired and the injury which will result
from failure to follow the procedure.
Hazards or unsafe practices which
COULD result in severe personal injury
or death. These instructions describe
the procedure required and the injury
which could result from failure to follow
the procedure.
Hazards or unsafe practices which COULD
result in minor personal injury or product
or property damage. These instructions
describe the requirements and the possi
ble damage which could result from failure
to follow the procedure.
NOTE
Instructions to aid in installation, operation, and
maintenance or which clarify a procedure.

OM-04707GHS SERIES
SAFETY PAGE A-1
SAFETY - SECTION A
This information is specific to Gorman‐Rupp GHS
Series Rotary Gear Pumps. It applies throughout
this manual and any manual or literature ac
companying the pump.
For information on the power unit used to drive this
pump, consult the separate literature accompany
ing the power unit.
Pumps and related equipment must be in
stalled and operated according to all na
tional, local and industry standards.
This manual will alert personnel to
known procedures which require spe
cial attention, to those which could
damage equipment, and to those which
could be dangerous to personnel. How
ever, this manual cannot possibly pro
vide detailed instructions and precau
tions for each specific application or for
every situation that might occur during
maintenance of the unit. Therefore, it is
the responsibility of the owner, installer
and/or maintenance personnel to en
sure that applications and/or mainte
nance procedures not addressed in this
manual are performed only after estab
lishing that neither personal safety nor
pump integrity are compromised by
such applications or procedures.
Before attempting to install, operate, or
service this pump, familiarize yourself
with this manual, and with all other liter
ature shipped with the pump. Unfamil
iarity with all aspects of pump operation
covered in this manual could lead to de
struction of equipment, injury, or death.
Depending on design and components,
this pump will handle a wide range of
light, medium, and heavy viscosity liq
uids at a variety of temperatures. Do not
apply at higher temperatures than the
seal will handle. Do not attempt to pump
liquids which may damage the pump or
endanger personnel as a result of pump
failure; consult the factory for chemical
compatibility.
Death or serious personal injury and
damage to the pump or components
can occur if proper lifting procedures
are not observed. Make certain that
hoists, chains, slings or cables are in
good working condition and of suffi
cient capacity and that they are posi
tioned so that loads will be balanced
and the pump or components will not be
damaged when lifting. Suction and dis
charge hoses and piping must be re
moved from the pump before lifting. Lift
the pump or component only as high as
necessary and keep personnel away
from suspended objects.
After the pump has been installed, make
certain that the pump and all piping or
hose connections are secure before op
eration. Loose connections can result in
damage to the equipment and serious
injury to personnel.

GHS SERIESOM-04707
PAGE A-2 SAFETY
Never operate the pump without a pres
sure relief valve installed on the pump
or in the discharge piping. Make certain
that pump‐mounted pressure relief
valves are installed with their adjusting
ends toward the suction port. If bi‐rota
tional operation is required, a pressure
relief device must be provided for both
directions of flow. Operation without a
pressure relief valve or with an improp
erly installed relief valve could cause
the pump to explode, resulting in seri
ous injury or death to personnel.
Do not operate this pump without
guards in place over the rotating parts.
Exposed rotating parts can catch cloth
ing, fingers or tools, causing severe in
jury to personnel.
Before attempting to open or service the
pump:
1. Familiarize yourself with this man
ual.
2. Lock out incoming power to the
drive unit to ensure that the pump
will remain inoperative.
3. Allow the pump to completely cool
if overheated.
4. Close the discharge and suction
valve (if used).
An overheated pump can cause severe
burns and injury. If overheating occurs:
1. Stop the pump immediately.
2. Allow the pump to completely cool.
3. Refer to the instructions in this
manual before restarting the
pump.
Do not remove plates, covers, gauges,
pipe plugs or fittings from an over
heated pump. Vapor pressure within the
pump can cause parts being disen
gaged to be ejected with great force. Al
low the pump to completely cool before
servicing.
This pump may be used to handle liq
uids which may cause serious illness or
injury through direct exposure or
emitted fumes. Wear protective cloth
ing, such as rubber gloves, face mask
and rubber apron, as necessary, before
disconnecting or servicing the pump or
piping.

GHS SERIES OM-04707
PAGE B-1
INSTALLATION
INSTALLATION - SECTION B
Review all SAFETY information in Section A.
Pumps and related equipment must be in
stalled and operated according to all na
tional, local and industry standards.
Since pump installations are seldom identical, this
section is intended only to summarize general rec
ommendations and practices required to inspect,
position, and arrange the pump and piping. If there
are any questions concerning your specific instal
lation, contact your Gorman‐Rupp distributor or
the Gorman‐Rupp Company.
Most of the information applies to a flooded suction
installation where liquid is supplied under pres
sure.
If the pump is positioned above the liquid in a static
lift installation, information such as mounting, pip
ing configuration and priming must be tailored to
specific conditions.
These pumps are not recommended for
use with water. Some models may be used
with water when fitted with specific options;
consult the factory.
PUMP MODEL DESIGNATION
Following is a description of the model numbering
system for Gorman‐Rupp rotary gear pumps.
Rotary gear pump model numbers include design
style, port size, hydraulic size and construction
code.
Typical Pump Model
GHS 1 1/2 GF 32
Design
Style
Port
Size
Hydraulic
Size
Construction
Code
Design Style: Gorman‐Rupp rotary gear pumps
are available in five basic designs:
GMC - Medium Duty - Compact
GMS - Medium Duty
GHC - Heavy Duty - Compact
GHS - Heavy Duty
GHA - Abrasive Duty
Port Size: Gorman‐Rupp rotary gear pumps are
available in port sizes from 1 to 6 inches, depend
ing on the design style. Consult your Gorman‐
Rupp distributor or the factory for additional sizes.
Hydraulic Size: The first letter in the hydraulic size
is a rotor diameter code. The second letter indi
cates tooth length.
Construction Code: Construction Codes for Gor
man‐Rupp rotary gear pumps are as follows:
Code Description
3 Iron w/Mechanical Seal(s)
4 Iron w/Packing or Lip Seal(s)
9 316 SST w/Mechanical Seal(s)
10 316 SST w/Packing or Lip Seal(s)
31 Ductile Iron w/Mechanical Seal(s)
32 Steel w/Mechanical Seal(s)
37 Ductile Iron w/Packing or Lip Seal(s)
38 Steel w/Packing or Lip Seal(s)
Theoretical Displacement: Table B‐1 indicates
theoretical displacement values for each hydraulic
size.
NOTE
Actual capacities and recommended shaft speeds
vary according to application. Consult your Gor
man‐Rupp distributor or the factory for additional
information.

GHS SERIES
OM-04707
PAGE B-2 INSTALLATION
Table B‐1. Theoretical Displacement
Hydraulic
Size
Theoretical Displacement
Per Revolution
Gallons Centimeters3
DC 0.00568 21.486
DE 0.00704 26.646
GC 0.00967 36.619
GF 0.01405 53.186
GH 0.01915 72.479
GJ 0.02317 87.700
JG 0.03579 135.49
JJ 0.05159 195.28
JL 0.07078 267.94
JP 0.10078 381.48
NK 0.10665 403.71
NM 0.14173 536.51
NP 0.17681 669.31
RM 0.24030 909.65
RP 0.29979 1134.8
RR 0.35927 1360.0
RS 0.41876 1585.1
SR 0.65752 2489.0
SU 1.10240 4173.2
TU 1.91280 7240.7
PREINSTALLATION INSPECTION
The pump assembly was inspected and tested be
fore shipment from the factory. Before installation,
check for damage which may have occurred dur
ing shipment. Check as follows:
a. Inspect the pump assembly for cracks, dents,
damaged threads, and other obvious dam
age.
b. Check for loose attaching hardware. Since
gaskets tend to shrink after drying, check for
loose hardware at the mating surfaces.
c. Carefully read all tags, decals, and markings
on the pump assembly, and perform all duties
indicated.
STORAGE
Due to the extreme close machining toler
ances within rotary gear pumps, proper
storage before installation is essential to
prevent damage to the pump.
If the pump will not be immediately installed, follow
these procedures or damage to the pump will oc
cur.
a. Do not flush the pump. Ensure that the port
plugs shipped with the pump remain in place
until piping is installed to help prevent dust or
other foreign objects from entering the pump.
b. Pumps that will not be installed for an ex
tended period should be stored indoors if
possible. The factory‐installed port plugs will
not ensure protection from excessive humid
ity, splash water or rain. In very humid or wet
conditions, install air‐tight plugs in the ports
and fill the pump completely with a lubricating
preservative liquid that is compatible with the
liquid to be pumped.
c. Pumps stored outdoors must be fully pre
served as described above, completely cov
ered with plastic or other water‐tight material,
and the covering anchored to ensure that it
will not be blown off.
Flushing
Clean piping is essential because of close‐
tolerance moving parts in this pump. Flush
all dirt, grit, weld beads or scale from the
suction piping before installing the pump.
Damage to the pump because of debris in
the suction line is not covered by the pump
warranty.
Before shipment, the pump may have been tested
using a petroleum‐based preservative. If flushing is
required, do not do so until just before installation;
the test oil protects close‐tolerance pump parts
from corrosion.
NOTE
Simple flushing of the wetted end of the pump to re
move test liquid may not be sufficient to thoroughly
clean the seal cavity. Pump design and the particu
lar seal assembly being used may require draining
the seal area by removing the backhead plug and
then flushing through a separate line.

GHS SERIES OM-04707
PAGE B-3
INSTALLATION
Most cleaning solvents are toxic and
flammable. Use them only in a well ven
tilated area free from flame, sparks, and
excessive heat. Read and follow all pre
cautions printed on solvent containers.
To flush the pump, use an approved solvent com
patible with the liquid being pumped. Make cer
tain that the solvent will not attack pump com
ponents, particularly seals and gaskets.
PUMP INSTALLATION
Pump dimensions are shown in the separate
Pump Specification Bulletin.
Never operate the pump without a pres
sure relief valve installed on the pump
or in the discharge piping. Make certain
that pump‐mounted pressure relief
valves are installed with their adjusting
ends toward the suction port. If bi‐rota
tional operation is required, a pressure
relief device must be provided for both
directions of flow. Operation without a
pressure relief valve or with an improp
erly installed relief valve could cause
the pump to explode, resulting in seri
ous injury or death to personnel.
Maximum Operating Parameters
Rotary gear pumps are capable of different operat
ing parameters depending on such things a specif
ic materials of construction, pump options, liquid
being pumped, etc. In no case should the applica
tion exceed the parameters shown below. Consult
the factory for specific ratings.
*Maximum Operating Parameters
Pressure 200 psi (14 Bar)
Speed 520 rpm
Temperature 500F (260C)
* Consult Factory for Specific Ratings
Lifting
Death or serious personal injury and
damage to the pump or components
can occur if proper lifting procedures
are not observed. Make certain that
hoists, chains, slings or cables are in
good working condition and of suffi
cient capacity and that they are posi
tioned so that loads will be balanced
and the pump or components will not be
damaged when lifting. Suction and dis
charge hoses and piping must be re
moved from the pump before lifting. Lift
the pump or component only as high as
necessary and keep personnel away
from suspended objects.
Pump unit weights will vary depending on the
mounting and drive provided. Check the shipping
tag on the unit packaging for the actual weight, and
use lifting equipment with appropriate capacity.
Drain the pump and remove all customer‐installed
equipment such as suction and discharge hoses
or piping before attempting to lift existing, installed
units.
Positioning The Pump
Locate the pump as close as possible to the liquid
being pumped. Locating the pump below the liq
uid source will help self‐priming and reduce the
possibility of cavitation.
Mounting
The pump may be shipped alone, mounted on a
base, or with pump and motor mounted on a base.
Install the pump and motor on a base before
mounting the base on a foundation.