Carver Pump GH Setup guide

GH Pump
SAFETY, INSTALLATION, OPERATION AND
MAINTENANCE INSTRUCTIONS
This manual shall always be kept close to the unit’s location of operation or directly on the pump set.
Part Number: _______________________________________
Serial Numbers: _____________________________________
These operating instructions contain fundamental information and precautionary notes. Please read the manual
thoroughly prior to installation of unit, electrical connection and commissioning. It is imperative to comply with all other
operating instructions referring to components of individual units.
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GH Pump 120 –16.02.EN
MANUFACTURER: CARVER PUMP COMPANY
2415 PARK AVE.
MUSCATINE, IOWA, USA 52761
PRODUCT DESCRIPTION: 120 GH Pumps
PART NUMBER:
SERIAL NUMBER:
DATE MANUFACTURED:
APPLICABLE EUROPEAN DIRECTIVES:
Machinery: The designated product complies with the following basic requirements of Directive 2006/42/EC:
Appendix I, section 1.1.2, 1.1.3., 1.1.5., 1.3.1., 1.3.2., 1.3.3., 1.3.4., 1.3.7., 1.3.8., 1.4.1., 1.4.2.1., 1.5.1., 1.5.8.,
1.5.9., 1.5.13., 1.6.1., 1.6.4., 1.6.5., 1.7.
APPLICABLE HARMONIZED STANDARDS:
Machinery: EN ISO 12100:2010 EN ISO 13732-1:2008
EN 626-1:2008 EN ISO 13857:2008
Declaration of Incorporation of Partly Completed Machinery (valid for 120 pumps supplied without a motor)
The product described in this Declaration of Conformity complies with the Applicable European Directives, EHSRs and relevant
sections of the Applicable International Standards "as a Component". The incorporation of this pump with Electric Motors that
are marked to confirm that they comply with the Low Voltage Directive 2006/95/EC and all the necessary guards, must be
declared in conformity by the assembler.
Declaration of Conformity of Completed Machinery (valid for 120 pumps supplied complete with a motor)
The product described in this Declaration of Conformity complies with the Applicable European Directives, EHSRs and relevant
sections of the Applicable International Standards. Motors for CE marked pumps will have motors that are marked to confirm that
they comply with the Low Voltage Directive 2006/95/EC.
The special technical documentation has been complied according to Annex VII Part B of Directive 2006/42/EC, and will be made
available in electronic form to the authorities of the individual states upon justified request.
NOTE: The 120 pumps are NOT supplied or declared to ATEX Directive 94/9/EC.
Person authorized to compile the technical documentation:
Kurt Doren, Quality/ISO Manager, Carver Pump Company, 2415 Park Ave, Muscatine Iowa, USA 52761
Authorized Signature: Date:
Important safety information is contained in the installation, operation and service manuals; read and understand this
information prior to installing or using this equipment
This Document applies only to the equipment described above and is invalid if not reproduced in its entirety.
EC Declaration of Conformity
Kurt Doren
Quality/ ISO Manager
www.carverpump.com
Phone: [phone]
Email: [e-mail]

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SERVICE RECORD PAGE
Service No. ______________________Model _________________________ Size and Type _______________
Customer Order No. ____________________________Date Installed __________________________________
Installation Date
Location
Application
PUMP RATING
Capacity _____________________________________ Total Head ____________________________________
Suction Pressure ______________________________ Speed (RPM) __________________________________
Liquid pumped ________________________________ Temperature ___________________________________
Specific Gravity _______________________________ Viscosity ______________________________________
Service ______________________________________
PUMP MATERIALS
Casing _________________________ Impeller _______________________ Shaft _______________________
Gaskets _____________________________________ Bearing Frame _________________________________
Mechanical Seal/Packing ________________________
MOTOR DATA
Motor __________________________ Make _________________________ Serial No. ___________________
Type ___________________________ Frame ________________________ AC or DC ___________________
HP _____________________________ RPM _________________________ Volts _______________________
Phase __________________________ Cycles ________________________

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NOTES ON INSPECTION AND REPAIRS
INSPECTION DATE
REPAIR TIME
REPAIRS
COST
REMARKS

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INSTALLATION, OPERATION AND
MAINTENANCE INSTRUCTIONS
TABLE OF CONTENTS
SECTION/PARAGRAPH PAGE
I. GENERAL DESCRIPTION...............................1
A. General Information ...................................1
B. Machinery Directive 2006/42/EC ...............1
C. Disclaimer ..................................................1
D. Personnel Qualification and Training.........1
E. Pump Identification.....................................2
F. Parts Inventory Guide ................................2
G. Parts Ordering............................................2
H. Unauthorized Modification and
Manufacture of Spare Parts.....................2
I. Unauthorized Modes of Operation.............2
II. SAFETY............................................................2
A. Safety Precautions.....................................2
B. Summary of Safety Marking.......................2
C. Scope of Compliance.................................3
D. Safety Awareness ......................................3
E. Safety Instructions for the Operator/User ..3
F. Safety Instructions for Maintenance
Inspection and Installation Work............3
G. General Safety Instructions........................3
H. Non-Compliance with Safety Instructions..4
III. EQUIPMENT DESCRIPTION...........................4
IV. EFFECTS OF FLUIDS .....................................5
A. Net Positive Suction Head (NPSH)............5
B. Changing Pump Speed..............................5
C. Effects of Viscosity.....................................5
D. Effects of Specific Gravity..........................5
V. TECHNICAL DATA...........................................5
VI. INSPECTION AND STORAGE ........................8
A. Inspection...................................................8
B. Packing for Return .....................................8
C. Storage of Pump........................................8
VII. INSTALLATION................................................9
A. Location......................................................9
B. Handling.....................................................9
C. Foundation .................................................9
SECTION/PARAGRAPH PAGE
D. Leveling of Unit.......................................... 10
E. Grouting ..................................................... 10
F. Coupling Alignment.................................... 11
G. Pre-Installation Procedures ....................... 12
H. Piping......................................................... 12
I. Auxiliary Piping Connections
and Gauges ........................................... 12
J. Motor.......................................................... 12
K. Direction of Rotation .................................. 12
VIII. OPERATION .................................................... 13
A. Pre-Start Cautions ..................................... 13
B. Priming....................................................... 13
C. Starting the Pump...................................... 13
D. Operating Checks...................................... 14
E. Stopping the Pump .................................... 14
F. Indefinite Shutdown ................................... 14
IX. TROUBLESHOOTING OPERATING
PROBLEMS...................................................... 14
X. MAINTENANCE ............................................... 17
A. Lubrication of Pump Bearings.................... 17
B. Lubrication of Motor Bearings.................... 18
C. Torque Values............................................ 18
XI. SERVICE AND REPAIR................................... 18
A. Preparations for Disassembly of Pump ..... 18
B. Disassembly of Pump................................ 19
C. Parts Inspection......................................... 21
D. Reassembly of Pump................................. 23
E. Replacement of Packing............................ 25
F. Replacement of Mechanical Seal .............. 26
G. Replacement of Optional Wear Ring on
Pump Equipped with Enclosed Impeller.... 27
H. Motor.......................................................... 27
I. Check Valve............................................... 27
XII. PARTS LISTS AND DRAWINGS..................... 27

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TABLE OF CONTENTS - Continued
LIST OF TABLES
NUMBER TITLE PAGE
1. Maximum Discharge Pressure on
Discharge Case .........................................4
2. Key Component Materials ...........................7
3. Key Mechanical Data...................................7
4. Pumping Unit Troubleshooting .................. 15
5. Recommended Torque Values.................. 18
6. Recommended Equipment ........................ 18
7. Parts List.................................................... 26
8. Recommended Spare Parts ...................... 27
LIST OF ILLUSTRATIONS
NUMBER TITLE PAGE
1. Stuffing Box Dimensions..............................6
2. Transport of the Bare Pump ........................9
3. Transport of Close-Coupled Pump..............9
4. Grout and Foundation Bolting......................10
5. Coupling Alignment......................................11
6. Removing Packing with Hook......................24
7. Packing Alignment.......................................24
8. Mechanical Seal ..........................................25
9. Exploded View –Frame Mounted
(Shown with Mechanical Seal) ..................29
10. Exploded View - Close-Coupled
(Shown with Packing)................................30

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1
I. GENERAL DESCRIPTION AND
SAFETY PRECAUTIONS.
A. GENERAL INFORMATION. Carver Pump
Company products are carefully engineered and
manufactured and, if properly installed, maintained, and
operated, should provide maintenance-free operation
and a long service life.
CAUTION
These instructions must always be kept close
to the product's operating location or directly
with the product.
This manual is designed to provide sufficient material to
properly maintain the total pumping unit. The information
presented should improve your knowledge and
understanding of the GH Pump, thus upgrading the
reliability, service life, and quality of pump maintenance.
These operating instructions are intended to facilitate
familiarization with the product. These operating
instructions do not take into account local regulations;
the operator must ensure that such regulations are
strictly observed by all, including the personnel called in
for installation. Compliance with such laws relating to
the proper installation and safe operation of the pumping
equipment is the responsibility of the equipment owner
and all necessary steps should be taken by the owner to
assure compliance with such laws before operating the
equipment. These instructions are intended to facilitate
familiarization with the product and its permitted use to
help satisfy safety requirements. Always coordinate
repair activity with operations personnel, and follow all
plant safety requirements and applicable safety and
health laws/regulations.
Refer to Figures 9 and 10 to locate the pump parts by
item number. Variations do exist between
configurations, not all parts described in the text may be
on your configuration.
CAUTION
These instructions should be read prior to
installing, operating, using and maintaining the
equipment in any region worldwide and in
conjunction with the main user instructions
provided. The equipment must not be put into
service until all the conditions relating to safety
instructions have been met.
B. MACHINERY DIRECTIVE 2006/42/EC. This
product is designed to Conform with Machinery Directive
2006/42/EC, Safety of Machinery EN ISO 12100:2010,
EN ISO 13732-1:2008, EN 626-1:2008, EN ISO
13857:2008, and the EHSRs.
Complete Machinery for use in EU and EAA will have
CE mark and Declaration of Conformity. Motors for CE
marked pumps will have motors that are marked to
confirm that they comply with the Low Voltage Directive
2006/95/EC.
CAUTION
Pumps assembled without a motor will have a
Declaration of Incorporation and will not have a
CE mark. When a motor is added, all guards
must be installed, the motor must be CE
marked and the completed machine reviewed
for compliance for applicable EHSRs before a
CE mark is attached.
NOTE
Since 29 December 2009 Directive 2006/42/EC
has regulated the placing on the market, and
the putting into service, of machinery in the
EEA, replacing Directive 98/37/EC.
C. DISCLAIMER. Information in these User
Instructions is believed to be reliable. In spite of all the
efforts of Carver Pump Company to provide sound and
all necessary information the content of this manual may
appear insufficient and is not guaranteed by Carver
Pump Company as to its completeness or accuracy.
D. PERSONNEL QUALIFICATION AND TRAINING.
All personnel involved in the operation, installation,
inspection and maintenance of the unit must be qualified
to carry out the work involved. If the personnel in
question do not already possess the necessary
knowledge and skill, appropriate training and instruction
must be provided. If required the operator may
commission the manufacturer/supplier to provide
applicable training.
Follow instructions in this manual carefully. Factory
warranty applies only when pump operates under
conditions as specified on order acknowledgment, and if
pump is properly installed and maintained as
recommended herein. A copy of this manual should be
available to operating personnel. Additional copies of
this manual are available upon request from Carver
Pump Company, your local distributor or from our web
site. For comments and/or questions about information

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GH Pump 120 –16.02.EN
2
provided, please contact Carver Pump Company or your
local distributor.
E. PUMP IDENTIFICATION. The type of pump, pump
size, operating data, and serial number are all stamped
on the nameplate attached to the pump. Pump
specifications should be recorded upon receipt of the
pumping unit. Record all necessary information on the
pump service record page and inspection and repair
record provided at the front of this manual. This
information must be included in all correspondence
regarding the unit. This will ensure that the correct pump
and/or parts are ordered in a timely manner.
F. PARTS INVENTORY GUIDE. To avoid
unnecessary delays for maintenance, spare parts
should be readily available, purchase before and keep in
stock, for normal service. Most conditions will be
covered if this manual is followed. For every one to
three pumps, stock one spare set consisting of items
listed in Table 8, Recommended Spare Parts. Part
numbers correspond to Figures 9 and 10.
G. PARTS ORDERING. When ordering replacement
parts, please specify:
Model of pump (located on nameplate)
Serial number of pump (located on nameplate)
Part name (located on parts list)
Quantity of parts needed
Carver Pump Company may ship an interchangeable
part that is not identical in appearance or symbol. This is
done only if the part has been improved. Examine parts
carefully upon delivery before questioning factory or
company representative. Never return parts to the
factory without authorization from Carver Pump
Company.
If an impeller is ordered, specify diameter across blade
tips. Be sure diameter was NOT trimmed further than
diameter shown on Carver Pump Company records.
If a driver or driver parts are ordered, specify name of
manufacturer and all other data found on the driver
nameplate.
H. UNAUTHORIZED MODIFICATION AND
MANUFACTURE OF SPARE PARTS. Modifications or
alterations of the pumping unit supplied are only
permitted after consultation with Carver Pump and to the
extent permitted by Carver Pump. Original spare parts
and accessories authorized by Carver Pump ensure
safety. The use of other parts can invalidate any liability
of Carver Pump for consequential damage and/or
warranty.
I. UNAUTHORIZED MODES OF OPERATION. The
warranty relating to operating reliability and safety of the
unit supplied is only valid if the pumping unit is used in
accordance with its designated use as described in the
following sections. The limits stated on the nameplate
must not be exceeded under any circumstances.
II. SAFETY.
A. SAFETY PRECAUTIONS. The manual is designed
to provide adequate instructions for the safe and
efficient installation, operation, or maintenance of the
pump. Failure or neglect to properly install, operate, or
maintain the pump may result in personal injury,
property damage, or unnecessary damage to the pump.
This manual must be read and understood both by the
installing personnel and the responsible trained
personnel/operators prior to installation and operation,
and it must always be kept close to the location of the
pumping unit for easy access.
B. SUMMARY OF SAFETY MARKING. The safety
instructions contained in this manual where non-
observance of the instruction will cause a hazard is
specially marked with the symbol:
General hazard sign to ISO 7000 - 0434.
Notes highlight an operating or maintenance procedure,
condition, or statement which is essential, but is not of
known hazardous nature as indicated by DANGERS,
WARNINGS and CAUTIONS.
The word "CAUTION" is used to introduce safety
instructions whose non-observance may lead to damage
to the machine and its functions.
The word "WARNING" is used to introduce safety
instructions whose non-observance may lead to a
potential hazard exists, capable of producing injury to
personnel, if approved procedures are not followed.
The word “DANGER” indicates a location, equipment, or
system where imminent hazards exist, capable of
producing immediate injury or death to personnel, if
approved procedures are not followed.
Instructions attached directly to the machine, e.g.
Arrow indicating the direction of rotation
Markings for fluid connections must always be
complied with and be kept in a perfectly legible
condition at all times.

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3
Observe all notes, caution or danger tags attached to
the equipment or included in this manual.
C. SCOPE OF COMPLIANCE.
Where Carver Pump has supplied only the bare shaft
pump, the rating applies only to the pump. The party
responsible for assembling the pump set shall select the
coupling, driver, seal and any additional equipment, with
the necessary EC Certificate/Declaration of Conformity
establishing it is suitable for the area in which it is to be
installed.
D. SAFETY AWARENESS. It is imperative to comply
with the safety instructions contained in this manual, the
relevant national and international explosion protection
regulations, health and safety regulations and the
operator’s own internal work, operation and safety
regulations.
E. SAFETY INSTRUCTIONS FOR THE OPERATOR
/USER.
Any hot or cold components that could pose a
hazard must be equipped with a guard by the
operator.
Guards which are fitted to prevent accidental
contact with moving parts (e.g. coupling) must
not be removed whilst the unit is operating.
Leakages (e.g. at the shaft seal) of hazardous
fluids (e.g. explosive, toxic, hot) must be
contained so as to avoid any danger to persons
or the environment. Pertinent legal provisions
must be adhered to.
Electrical hazards must be eliminated. (In this
respect refer to the relevant safety regulations
applicable to different countries and/or the local
energy supply companies.)
F. SAFETY INSTRUCTIONS FOR MAINTENANCE,
INSPECTION AND INSTALLATION WORK. The
operator is responsible for ensuring that all
maintenance, inspection and installation work be
performed by authorized, qualified personnel who are
thoroughly familiar with the manual and pumping unit.
The pumping unit must have cooled down to ambient
temperature, pump pressure must have been released
and the pump must have been drained before working
on any pumping unit. Work on the pumping unit must be
carried out during shutdown. The shutdown procedure
described in the manual for taking the unit out of service
must be adhered to.
Pumps handling fluids that are hazardous to personnel
must be decontaminated prior to being worked on.
Immediately following completion of the work, all safety
relevant and protective devices must be reinstalled
and/or reactivated. Please observe all instructions set
out in the Section VIII on start up before returning the
pumping unit to service.
G. GENERAL SAFETY INSTRUCTIONS.
Various federal, state, and local laws affect
installation, use, and operation of pumping
equipment. Compliance with such laws relating
to proper installation and safe operation of
pumping equipment is the responsibility of the
equipment owner.
Prior to working on pump or driver, ensure all
switches and circuit breakers have been locked
in the open (off) position and tagged, “Out of
Service.”
All circuits NOT known to be dead must be
considered live at all times.
DO NOT wear loose or torn clothing around
rotating machines.
While working near electricity, DO NOT use
metal rules, flashlights, metallic pencils, or any
other objects having exposed conducting
material.
Make sure you are NOT grounded while
adjusting electrical equipment or using
measuring equipment.
In general, use only one hand when servicing
live electrical equipment.
Make sure to de-energize all electrical
equipment before connecting or disconnecting
meters or test leads.
For connecting a meter to terminals for
measurement, use a range higher than the
expected voltage.
Check to make sure that the frame of the driver
and starter panel are securely grounded before
operating pumping unit or performing any tests
or measurements.
If a test meter must be held or adjusted while
voltage is applied, ground case of meter before
starting measurement. DO NOT touch live
equipment while holding the meter. Some
moving vane-type meters should not be
grounded nor held during measurements.
DO NOT use test equipment known to be
damaged or in poor condition.

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4
H. NON-COMPLIANCE WITH SAFETY
INSTRUCTIONS. Non-compliance with safety
instructions may result in personal injury, property
damage, or unnecessary damage to the pumping unit.
Non-compliance with these safety instructions will also
lead to forfeiture of any and all rights to claims for
damages. Non-compliance, can for example, result in:
Failure of important pumping unit functions.
Failure of prescribed maintenance and servicing
practices.
Hazard to personnel by electrical, mechanical,
and chemical effects.
Hazard to the environment due to leakage of
hazardous substances.
Avoid Possible Non-Compliance. The following
specific safety precautions apply to the pumping unit:
DO NOT exceed maximum discharge pressure
on discharge case (Refer to Table 1).
DO NOT operate pump without fluid to seal or
packing.
DO NOT run pump dry for extended periods of
time (longer than 1/2 hour)
DO NOT run pump against a closed discharge
valve.
DO NOT exceed the Maximum rated speed
(3550 RPM).
A check valve should be installed in the
discharge line.
Pumps assembled by Carver without a motor
will have a Declaration of Incorporation and will
not have a CE mark. When a motor is added, all
guards must be installed, the motor must be CE
marked and the completed machine reviewed
for compliance for applicable EHSRs before a
CE mark is attached.
Table 1. Maximum Discharge Pressure on
Discharge Case
Pump Size
Maximum Working Pressure
(PSI) Cast Iron Class 30
AA - 1 ¼ x 1 x 5
200
AB - 2 x 1 ½ x 5
200
AC - 2 ½ x 2 x 5
200
BA - 1 ¼ x 1 x 7
200
BB - 1 ½ x 1 ¼ x 7
200
BC - 2 ½ x 2 x 7
200
BD - 3 x 2 ½ x 7
200
BE - 4 x 3 x 7
200
BF - 5 x 4 x 7
200
CA - 1 ½ x 1 ¼ x 10
250
CB - 2 x 1 ½ x 10
250
CC - 2 ½ x 2 x 10
250
CD - 3 x 2 ½ x 10
250
CE - 4 x 3 x 10
250
CF - 5 x 4 x 10
250
CG - 6 x 5 x 10
250
DA - 2 x 1 x 11
250
DB - 4 x 2 x 11A
250
DC - 4 x 3 x 11
250
DD - 5 x 4 x 11
125
DE - 8 x 6 x 11
125
DF - 4 x 2 x 11B
250
EA - 2 ½ x 1 ½ x 13
150
EB - 2 ½ x 2 x 13
150
EC - 3 x 2 ½ x 13
150
ED - 4 x 3 x 13
150
EE - 5 x 4 x 13
150
EF - 6 x 5 x 13
150
EG - 8 x 6 x 13
150
III. EQUIPMENT DESCRIPTION.
Standard materials of construction are cast iron and
CD4MCu. Other metallurgies are available, such as
hard iron, monel, hastelloy, etc... Also available is a fully
rubber lined version for abrasive and extremely
corrosive application including the Flue Gas De-
sulfurization (FGD) process with high chlorides.
The bare pump consists of following major parts and
options. Please refer to Figures 9 and 10, assembly
drawings, for the location of parts identified by item
numbers.
Item 1 - Casing. The casing houses the impeller (2)
and consists of the discharge volute, suction cover (9),
back cover (11), and stuffing box. The casing is secured
to the suction cover with capscrews (611) and to the
discharge piping with capscrews and nuts not provided
with the unit.

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Item 2 or 3 - Impeller. The pumps are equipped with
semi-open or enclosed impellers. The impeller is keyed
to the shaft (6) by the impeller key (32) and is locked in
place by the impeller capscrew (26) and impeller washer
(28).
Item 6 - Shaft. The shaft of the pump is designed to
provide stabilization to the rotor system when pump
operates away from the best efficiency point. A coupling
connect the pump shaft to the driver shaft.
Item 16 and 18 –Radial and Thrust Ball Bearings.
Deep groove Conrad type, C-3 internal fit ball bearing or
C-3 internal fit ball bearing are housed in the bearing
frame (19).
Item 19 - Bearing Frame. If equipped, the principal
function of the bearing frame is to carry the loads from
the liquid end of the pump to the base and to transport
power from the motor to the impeller (2). The bearing
frame has an outboard radial ball bearing (16) and an
inboard thrust ball bearing (18).
Item 90 –Mechanical Seal. A mechanical seal may be
supplied in place of a packed stuffing box when
specified by the customer. Many variations of types and
materials are available.
IV. EFFECTS OF FLUIDS.
A. NET POSITIVE SUCTION HEAD (NPSH). Any
liquid, hot or cold, must be pushed into the impeller of
the pump by some absolute pressure, such as the
atmosphere or the vessel pressure from which the pump
takes its action.
The head in feet of liquid necessary to maintain the
required flow into the pump is called the Net Positive
Suction Head (NPSH). This value is measured above
the vapor pressure of the liquid at the pumping
temperature.
NPSH is commonly expressed in two ways: the NPSH
required by the pump, and shown on the pump curve, is
the head needed to cover the losses in the pump
suction and the energy required to enable the liquid to
climb onboard the leading edge of the impeller vane.
The NPSH available is that inherent in the system,
taking into account friction losses in suction piping,
valves, fittings, etc. In all cases, the NPSH available,
measured above vapor pressure, must exceed the
NPSH required in order to push the liquid into the pump.
B. CHANGING PUMP SPEED. Changing the speed of
a centrifugal pump affects the capacity, total head,
NPSH required and the brake horsepower. In general
the capacity will vary in a direct ratio with the speed,
whereas the total head and NPSH required will vary as
the ratio of the speed squared. The brake horsepower
will vary as the ratio of the speed cubed.
C. EFFECTS OF VISCOSITY. The pump is designed
to deliver rated capacity at rated head for a liquid with a
particular viscosity. When pump is handling heavy
viscous liquid, the viscosity of the liquid must allow it to
be pumped easily. The liquid may have to be heated
prior to starting the pump. When contemplating
operation at some viscosity other than that for which the
pump was originally designed, check with Carver Pump
Company.
D. EFFECTS OF SPECIFIC GRAVITY. The capacity
and total head in feet of liquid developed by a centrifugal
pump are fixed for every point on the curve and are
always the same for the same speed. Neither capacity
nor total head will be affected by a change in the
specific gravity of the liquid pumped. However, since the
discharge pressure in Pounds per Square Inch (PSI)
and the brake horsepower required driving the pump are
functions of the specific gravity of the liquid, both will be
affected in direct proportion by any change in specific
gravity. Therefore, an increase in specific gravity will
raise the discharge pressure and is dangerous as it
might overload the pump's driver, or exceed the pump
casing allowable pressure.
V. TECHNICAL DATA.
Specifications and operating limits should be recorded
on a Service Record Page; an example is located in the
front matter of this manual. Record the necessary
information upon receipt of the pumping unit.
Stuffing Box. The stuffing box, Figure 1, is where the
packing or mechanical seal is located.
Materials of Construction. The listed material
specifications in Table 2 are referenced for standard
catalog options.
Mechanical Data. The Key Mechanical data in Table 3
lists the maximum allowable horsepower at the
maximum allowable pump shaft speed (3600 RPM).
Dimensions and diameters are reference and given in
inches.

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6
10P Bearing Frame
20P Bearing Frame
30P Bearing Frame
Figure 1. Stuffing Box Dimensions

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7
Table 2. Key Component Materials
Component
Material
Specification
Bearing Frame
Cast Iron
ASTM A48, Class 30
Casing
316
ASTM A44, Class 30
Cast Iron
ASTM A48, Class 30
Impeller
Bronze
ASTM B584,C87500
Cast iron
ASTM A48, Class 30
316 SS
ASTM A744, Grade CF-8M
Shaft
Carbon steel
ASTM A108, Grade 1215
Table 3. Key Mechanical Data
Item
Bearing Frame
10P
20P
30P
Max power (BHP) @ 1750 RPM
20
75
250
@ 3600 RPM
40
150
500
Radial bearing type
207
210
211
Thrust bearing type
307
310
5,611
Thrust bearing lube (standard)
Grease
L10 bearing life (hrs) –radial
50,000
- thrust
25,000
Radial to thrust bearing c/l (in.)
6.75
8.50
11.20
Shaft diameter @ coupling
1.250
1.50
2.000
@ radial bearing
1.378
1.968
2.166
@ thrust bearing
1.378
1.968
2.165
@ impeller hub
0.875
1.250
1.625
@ shaft sleeve
1.000
1.375
1.750
Shaft sleeve OD (in.)
1.250
1.750
2.125
Impeller –thrust bearing c/l (in.)
8.00
9.00
9.63
Rotor WR2 (lb –in.) - shaft
0.014
0.058
0.126
7” impellers
15.10
10” impellers
56.67
11” impellers
137.56
13” impellers
233.74

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GH Pump 120 –16.02.EN
8
VI. INSPECTION AND STORAGE.
A. INSPECTION. Upon receipt of the shipment,
unpack and inspect the pumping unit and individual
parts to insure none are missing or damaged. Carefully
inspect all boxes and packing material for loose parts
before discarding them. Check to make sure the
shipment complies with the purchase order. Immediately
report any missing parts or damage incurred during
shipment to the factory and to the Transportation
Company and file your “damage and/or lost in shipment”
claim with the carrier.
B. PACKING FOR RETURN. If the pumping unit is
sent back to Carver Pump Company for repair, drain the
unit, and re-seal all flanges and connections that were
covered or plugged. Ship the pump(s) in an assembled
condition to prevent damage to sealing faces of
individual components. A Return Goods Authorization
(RGA) and a Material Safety Data Sheet (MSDS) is
required on all returned pumps. Copies of MSDS
records should be kept and maintained by the customer.
The customer is responsible for cleaning and flushing
the pump before it is returned to the factory. Make sure
to specify the fluid used in the service.
C. STORAGE OF PUMP. If the equipment is not to be
immediately installed and operated, store it in a clean,
dry, well ventilated place, free from vibrations, moisture
and rapid or wide variations in temperature.
NOTE
Storage requirements vary depending on
climatic environment, length of storage and
equipment. For storage periods of three months
or longer, contact manufacturer for specific
instructions. Improper storage could damage
equipment and would result in non-warranty
covered restoration of non-warranty covered
product failures.
When storing the pump up to three months rotate the
shaft for several revolutions at least once per month to
coat the bearings with lubricant, retard oxidation and
corrosion, and prevent possible false brinelling.
The motor bearings should be prepared for storage
according to the motor manufacturer’s instructions, in
the motor manufacturer’s maintenance manual, which
should come with the motor.
CAUTION
A pump which is made of iron or steel that sits
in extreme heat, high humidity, or full or
partially full water over 30 days will rust and will
most likely seize. If the pump rusts and/or
seizes, a complete overhaul and repair may be
necessary to refurbish the pump.
Consider a unit to be in storage when:
1. It has been delivered to the job site and is
waiting to be installed.
2. It has been installed but operation is delayed
pending completion of construction.
3. There are long (30 days or more) periods
between operating cycles.
4. The plant (or department) is shut down for
periods of longer than 30 days.
Measures to be taken for prolonged shutdown of
installed pumping unit. If the pumping unit remains
installed a periodic check of operation is in order to
make sure that the pump is always ready for instant
start-up and to prevent the formation of deposits within
the pump and the pump intake area. Start up the
pumping unit regularly once a month or once every 3
months for a short time (approximately 5 minutes)
during prolonged shutdown periods. Prior to operation
check run ensure that there is sufficient liquid available
for operating the pump.
Interim Storage (Indoors)/Preservation. When the
unit is temporarily put into storage, only the wetted low
alloy must be preserved. Commercially available
preservatives can be used for this purpose. Please
observe the manufacturer’s instructions for
application/removal.
The unit/pump should be stored in a dry room where the
atmospheric humidity is as constant as possible. If
stored outdoors, the unit and crates must be covered by
waterproof material to avoid any contact with humidity.
Protect all stored goods against humidity, dirt, vermin
and unauthorized access!
All openings of the assembled unit components are
closed and must only be opened when required during
installation. All blank parts and surfaces of the pump are
oiled or greased (silicone-free oil and grease) to protect
them against corrosion.

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GH Pump 120 –16.02.EN
9
VII. INSTALLATION.
A. LOCATION. The pump assembly should be
located in an area that will permit periodic inspection
and maintenance. Head room and access should be
provided and all units should be installed in a dry
location with adequate drainage. The discharge piping
should be direct with as few elbows and fittings as
possible.
The pump assembly should be installed as close to the
fluid as possible. A short, direct suction pipe can be
used to keep suction losses at a minimum. If possible,
locate the pump so fluid will flow by gravity to the
suction opening. The discharge piping should be direct
with as few elbows and fittings as possible. The total
NPSHA, which includes the suction lift and pipe friction
losses, must be greater than the Net Positive Suction
Head Required (NPSHR) by the pump.
B. HANDLING.
CAUTION
Use a hoist with adequate lifting capacity. See
pump nameplate for weights.
Do not pick up the complete unit by the motor
or the pump shafts or motor lifting eyes.
If the pumping unit slips out of the sling
arrangement, it may cause injury to personnel
and/or damage to the pumping unit.
Moving the unit requires proper preparation and
handling. Always make sure that the pump or the
pumping unit while being moved cannot slip out of the
transport suspension arrangement. Use a sling for
pumps without bases, refer to Figure 2. To lift a
complete unit, a hoist or suitable lifting device should be
attached to the base, refer to Figure 3. The individual
motor may be lifted using proper eyebolts provided by
the manufacturer, but these should not be used to lift the
assembled unit.
Figure 2. Transport of the Bare Pump
Figure 3. Transport of Coupled Pump
C. FOUNDATION. Make sure that the concrete
foundation has set firmly before placing the unit on it. Its
surface must be truly horizontal and even. The
foundation bolts must be inserted in the baseplate holes.
The foundation should be 3 to 6 inches wider and longer
than the baseplate, have a level surface, and be of
sufficient mass to prevent vibration and form a
permanent rigid support for the unit. The best
foundations are concrete with anchor bolts of adequate
size embedded in the foundation in pipe sleeves having
an inside diameter 2-1/2 times larger than the bolt
diameter. This will allow for accurate positioning of the
unit. Keep the concrete surface clean, yet rough.

I-120
GH Pump 120 –16.02.EN
10
D. LEVELING OF UNIT. When the pump is supplied
complete with motor and base, the unit is assembled at
the factory. Lower unit onto foundation, positioning base
structure so anchor bolts are aligned in middle of holes
in base.
The base should be supported on either rectangular
metal blocks with shims or on metal wedges having a
small taper. The support pieces should be placed close
to the foundation bolts. Refer to Figure 4, Grouting and
Foundation Bolting. Place supports directly under the
part of the base plate, which carries the greatest weight.
Space the supports closely enough to provide uniform
support of the base plate. Adjust the metal supports or
wedges until the shaft is level. Check suction and
discharge flanges of the pump by means of a level.
Make corrections, as necessary, by adjusting the
supports or wedges under the base plate.
The base should be supported on metal shims or metal
wedges placed directly beneath the part of the base
supporting the most weight. The shims or wedges
should be spaced close enough to give support and
stability.
Adjust metal supports or wedges until suction and
discharge flanges are level.
CAUTION
Do not attempt to straighten the base by using
the anchor bolts.
E. GROUTING. After the pumping unit has been
leveled and the alignment is correct, grout the unit to the
foundation using a high-grade, non-shrinking grout, refer
to Figure 4. Proceed grouting using the following
procedure:
Prepare concrete foundations, anchor bolts and leveling
screws according to individual instructions covering
these items.
1. Wax forms heavily with at least three coats of
paste wax. Forms must be substantial and well
braced. All corners, joints, bottoms must be
sealed with silicone caulk for water tightness. All
forms should have a 45° chamfer strip installed
to prevent stress risers.
2. Anchor bolt-free length must be wrapped with
duct seal or electricians plastic tape to prevent
grout from contacting the bare metal. Grout
sticking to the anchor bolt will prevent the
elongation necessary to develop the hold-down
force. Failure to do this will result in broken
anchor bolts.
3. If equipped leveling screws must be greased to
permit removal prior to the final torque.
4. Do not use shim packs as a leveling device
unless it is planned to remove them prior to final
torque application.
5. Leveling screw pads should be a minimum of
1/2" thick with minimum diameter of 3". Corners
of pad must be rounded to approximately 1/8"
radius to prevent stress cracking. Set leveling
screws on the chipped concrete surface. Set the
pad with quick set cement or resin repair
compound. With jacking bolt pads secure and
level, set and level base with leveling screws. If
not equipped with leveling screws use shims to
level.
6. The underside of the standard factory steel
base plate was painted with epoxy grout primer
and should only require proper cleaning. If the
base must be sandblasted, prepare the contact
faces to SSPC-SP 6 Spec. If base cannot be set
within 24 hours of blasting, the underside must
be coated with a compatible rust inhibitive
primer. Tighten foundation bolts loosely. Allow
the grout to fully cure before firmly
tightening the foundation bolts.
Figure 4. Grouting and Foundation Bolting
(If equipped)

I-120
GH Pump 120 –16.02.EN
11
F. COUPLING ALIGNMENT. The pump and motor
are connected by a coupling. Alignment is necessary
when the pump or motor are removed from the base.
The coupling should NOT be reconnected until the
alignment has been completed. Always check the
coupling alignment after shipping. The following is how
to check the coupling alignment.
NOTE
Refer to coupling manufacturer’s manual for
instructions regarding shaft alignment and
recommended installation limits.
Soft Foot –The equipment must rest flat on its
base. If one or more feet of the pump or motor
are shorter, longer, or angled in some way to
prevent uniform contact (a condition commonly
known as “soft foot”) it must now be corrected.
To improve the life of the coupling, the shafts must be
aligned to minimize deflection of the flexing elements.
Shaft alignment is required in the axial, parallel, and
angular directions, with each of these values not to
exceed the recommended installation limits. Shaft
alignment can be measured using various established
methods, including Laser Alignment, Reverse Dial
Indicator, and Rim and Face.
The motor and pump shafts must be accurately aligned
as any misalignment can cause damage to the coupling,
motor, or pump. When the shafts are in correct
alignment, the coupling hubs will be on a common axis,
concentric with each other, and at the correct distance
apart. If the coupling hubs are misaligned, it is general
practice to adjust the driver to the pump. Insert full
shims under the feet or supports of the motor and
tighten fastening bolts until correct alignment is
achieved.
1. Move the pump or motor to achieve acceptable
alignment. When properly aligned, the disc
packs will be centered and approximately
parallel to their mating flange faces and the
flexing elements will have little visible waviness
when viewed from the side.
NOTE
Refer to the coupling manufacturer’s manual for
recommended installation limits for Parallel,
Angular, and Axial alignment.
2. The “Parallel Misalignment” value (P) is the
offset between the centers of the hubs, as
shown in Figure 5.
3. When the Parallel Offset is measured by
rotating the hubs in unison with dial indicators
as shown in Figure 5, the Total Indicator
Reading (TIR) should be divided by (2) to
calculate (P).
4. It should be noted that parallel offset measured
on the hub surfaces includes misalignment of
the equipment shafting plus any variation (TIR)
in the hubs. This may be helpful to consider
during problem solving for alignment difficulties.
5. The “Angular Misalignment” value is the
maximum difference between the
measurements X and Y taken at opposite ends
of the hub flanges, as shown in Figure 5.
Figure 5. Coupling Alignment
Parallel Offset Misalignment
Parallel Offset (TIR)
Measurement
Angular Misalignment

I-120
GH Pump 120 –16.02.EN
12
G. PRE-INSTALLATION PROCEDURES.
DANGER
Before activating the pumping unit, check to
make sure there are no personnel working on
the unit. Serious injury or death to personnel
could result if the unit is activated while being
worked on.
1. Observe all caution or danger tags attached to
the equipment.
CAUTION
Never run the pump dry. Close running fits
within the pump are liquid lubricated. Dry
running will result in pump seizure or damage.
2. Before starting the pump, rotate shaft by hand
to assure all moving parts are free from rubbing.
3. Before starting the pump, install guards to
enclose all exposed rotating parts.
4. Before starting the pump, fill the volute and
suction line with liquid. The pump is being
primed in accordance with Section VIII,
Paragraph B.
5. Before starting a mechanical seal pump
equipped with external flush lines, turn on seal
water, and confirm the seal water is at sufficient
pressure.
6. Make sure all fasteners are torqued to the
proper torque values to avoid equipment
damage and injury to personnel.
H. PIPING. All piping should be independently
supported near the pump so that pipe strain will not be
transmitted to the pumping unit.
CAUTION
All piping connections must be made with the
pipe in a freely supported state. Do not apply
vertical or side pressure to align the piping with
the pump flange.
Before connecting suction, discharge, and auxiliary
piping, check to see that the piping is absolutely clean
internally. Any debris in the piping will be drawn into the
pump passageways and can cause extreme damage.
The internal diameters of the suction and discharge
lines must be equal to the internal diameters of the
pump suction and discharge nozzles.
Suction lift lines shall be laid with a rising slope toward
the pump and suction head lines with a downward slope
towards the pump.
The suction pipe must be air tight and sloped upward to
pump flange to avoid air pockets which will impair pump
operation. The discharge pipe should be as direct as
possible using a minimum number of valves to reduce
pipe friction losses.
Never use a straight taper (concentric) reducer in a
horizontal suction line because air pockets may form in
the top of the reducer and the pipe. Use an offset
(eccentric) reducer instead.
It is recommended to install a check valve and closing
valve in discharge line and closing valve in suction line,
depending on the type of plant and pump. The check
valve, between the pump and valve, protects pump from
water hammer and prevents reverse rotation in the
event of power failure. Closing valves are used in
priming, starting, and pump shut down. Pump must
never be throttled by use of a valve in the suction line.
Thermal expansions of the pipeline must be
compensated by appropriate measures so as not to
impose any extra loads on the pump exceeding the
permissible pipeline forces and moments. Refer to Table
1 for permissible forces and moments.
I. AUXILIARY PIPING CONNECTIONS AND
GAUGES. In addition to primary piping connections, the
pump may require other connections such as gauges or
drains. All these lines and gauges should now be
installed. Refer to vendor mechanical seal drawing for
seal line connections to the mechanical seal.
J. MOTOR. Refer to motor vendor’s manual for motor
information and information on connecting to the power
supply.
DANGER
Connection to the power supply must be
effected by a trained electrician only. Check
available main voltage against the data on the
motor rating plate and select appropriate start-
up method.
K. DIRECTION OF ROTATION. Correct pump rotation
is indicated by an arrow on the bearing frame or
backcover depending on the style of pump that you
have. The standard direction of rotation, viewed from the
motor end, is clockwise.

I-120
GH Pump 120 –16.02.EN
13
VIII. OPERATION.
A. PRE-START CAUTIONS.
DANGER
Before activating the pumping unit, check to
make sure there are no personnel working on
the unit. Serious injury or death to personnel
could result if the unit is activated while being
worked on.
1. Before starting or operating the pump, read this
entire manual, especially the following
instructions.
2. Observe all caution, warning or danger tags
attached to the equipment.
3. Rotate both the pump and driver shafts by hand
to assure all moving parts are free.
4. Before starting the pump, install closed guards
around all exposed rotating parts.
5. Check to make sure that fluid in the pump is
free of debris.
WARNING
Never run the pump dry. Close running fits
within the pump are liquid lubricated. Dry
running will result in pump seizure or damage.
6. Before starting a mechanical seal pump
equipped with external flush lines, turn on
mechanical seal water, and confirm the
mechanical seal water is at sufficient pressure.
Running without fluid in the stuffing box may
result in packing/mechanical seal failure.
7. If excessive vibration or noise occurs during
operation, shut the pump down and rotate shaft
by hand. If excessive vibration or noise
continues, consult a Carver representative.
B. PRIMING. Dry running a centrifugal pump can
result in extensive damage and possible seizing. It is,
therefore, imperative that the pump be primed prior to
initial start-up and that prime must be maintained
through subsequent start-stop cycles.
The priming procedure is different for positive and
negative suction head systems. Follow the procedure
listed below.
Positive Suction Head:
1. Open the vent on the highest point on the pump
volute.
2. Open all suction valves.
3. Allow liquid to flow from vent hole until all air
bubbles are vented. Then close the vent.
4. The pump is now primed.
Negative Suction Head:
1. Install an ejector or vacuum pump on the vent at
the highest point on the volute.
2. Close the discharge valve.
3. Open the suction valve.
4. Start the ejector or vacuum pump.
5. Allow liquid to flow until a continuous flow is
exhausted from ejector. Then close the valve to
the vent.
6. The pump is now primed.
C. STARTING THE PUMP.
CAUTION
DO NOT operate pumping unit against a closed
discharge system. If pump has any chance of
seeing operation against a closed system, a
bypass system allowing a minimum design flow
should be installed. This bypass will be
satisfactory for short periods of operation. For
extended periods of operation the bypass
should be sized for the minimum continuous
flow required by the pump.
1. Confirm pumping unit is ready to start.
Complete Section VIII, Paragraphs A and B.
2. If unit is equipped with mechanical seal cooling
lines, confirm that the mechanical seal cooling
water is turned on.
3. Open discharge valves slightly, about 1 to 1 ½
turns if pump is being started for the first time or
from being turned off for overhaul.
4. Open valves to pressure gauges in the system.
5. Start electrical power supply to driver. Start the
pump.
6. Slowly open system valves in discharge line and
adjust pressure and flow to the appropriate
operating conditions. Refer to pump nameplate
and system operating procedures for design
point condition.

I-120
GH Pump 120 –16.02.EN
14
D. OPERATING CHECKS.
1. Check for undue vibration or noise. If any
occurs and does not stop within a short period
of time, turn off the pump. For determination of
the cause and its remedy refer to
Troubleshooting in Section IX or consult Carver
Pump Company.
2. Check mechanical seals or packing rings for
leakage.
3. Check for adequate lubricating liquid flow to the
seal or packing.
4. Check that pump is operating within design
criteria and perimeters. Check and record flow
and pressure readings. The flow and pressure
readings should be within the operating system
guidelines and similar to number stamped on
the pump nameplate.
5. Check and record bearing temperature. It
should not exceed 70º C (160º F). Both inboard
(18) and outboard (16) ball bearing
temperatures should be measured and recorded
at a minimum of 15 minute intervals until the ball
bearing temperatures stabilize. Stabilization of
ball bearing temperature can be defined as the
results of three consecutive readings at
approximately 15 minute intervals with no
temperature rise.
6. Check and record power input to the motor.
7. Check and record vibration.
E. STOPPING THE PUMP.
WARNING
When pump is handling hazardous fluid,
extreme care must be taken to ensure safety of
personnel when attempting to drain pump.
Suitable protection devices should be used
and/or protective clothing should be worn.
1. If the pump is being stopped for overhaul, slowly
close the discharge valve. Otherwise leave
discharge valves set at condition.
2. Stop the pumping unit in accordance with the
directions on the electrical power supply.
3. Tagout and lockout power to motor according to
OSHA Standard 1910.147.
4. Close discharge and suction valves and any
auxiliary fluid lines.
5. The pumping unit is now off.
F. INDEFINITE SHUTDOWN.
Stop the pumping unit per Section VIII, Paragraph E.
Remove casing plug to drain casing. Drain all piping if
there is a possibility of liquid freezing. Relubricate
bearings. Provide pump and driver with a protective
cover.
Measures to be taken for prolonged shutdown of
installed pumping unit. If the pumping unit remains
installed a periodic check of operation is in order to
make sure that the pump is always ready for instant
start-up and to prevent the formation of deposits within
the pump and the pump intake area. Start up the
pumping unit regularly once a month or once every 3
months for a short time (approximately 5 minutes)
during prolonged shutdown periods. Prior to operation
check run ensure that there is sufficient liquid available
for operating the pump.
IX. TROUBLESHOOTING OPERATING
PROBLEMS.
If you have followed the installation and starting
procedures outlined in this manual, the pump should
provide reliable service and long life. However, if
operating problems do occur; significant time and
expense can be saved if you refer to Table 3 to
eliminate the most common causes of those problems.
NOTE
Immediate action to be taken before
proceeding with corrective actions in Table 4 is
to stop the pump, refer to Section VIII,
Paragraph E.