Rotech ANSI Series Instruction manual

ANSI Pump Series
INSTALLATION, OPERATION &
MAINTENANCE MANUAL

WARRANTY CLAUSE | LIMITED LIABILITY
Rotech Pumps
Pumps manufactured & assembled by Rotech covered by warranty for free of manufacturing defects for a period not exceed-
ing twelve months from the date of shipment from our Plant/warehouse. This warranty will be limited and subject to Rotech
authorisation /approval.
1. Rotech will make good by repair or its option the replacement of faulty parts under warranty, providing always that:
(a) The equipment was correctly installed and properly used in accordance with Rotech Installation & Operating
instruction manual and accepted codes of good engineering practice.
(b) The claims for goods under warranty arise solely from faulty design, material or workmanship. Rotech products
don’t offer warranty or guarantee for any pump application. The customer can’t blame Rotech for selection of
Material of constructions and other specifications. The customer can consult consulting engineers before
purchase of pumps.
(c) The repair is carried on in the Rotech service department or by an authorized agent or distributor appointed by
Rotech authorized repair agent must obtain written approval (WRA#) from Rotech before Completing repair under
warranty.
(d) Authorized repair agents will be refunded with the amount of equivalent to a similar repair work in the Rotech
service department.
(e) All freight costs to and from the service department or repair agents to be paid by the purchaser.
2. In the case of equipment or components which are not manufactured by Rotech, but supplied by Rotech.
For Example: Electric motors, engines, trade accessories etc. The warranty is limited of such equipment & subject
to respective manufacturers.
3. Rotech Pumps warranty doesn’t cover any of the following:
(a) Claims for third party liability, labor cost, transportation cost or damage caused by failure of any of the
company’s products.
(b) Damage caused by abnormal operating conditions, war, violence, storm, cataclysm or any other force.
(c) Damage caused by the equipment being used for an application for which it is not recommended.
(d) Damage caused by sand or abrasive materials, corrosion due to acid waters, electrolytic action, liquid
temperature beyond the recommended range, cavitation, improper supply voltage or insufficient liquid to enable
the pump to specification.
4. The decision of Rotech in relation to any claims or disputes over warranty is final.
5. This warranty is in lieu of all other warranties and conditions expressed or limited written or oral, statutory to the extent
allowable by law or otherwise, which are hereby negated and excluded.
Limited Liability
Rotech shall not be liable for any damage, delays or personal injury caused by following improper or proper procedure of
installation and maintenance of equipment being supplied by Rotech.
The pump and other equipment supplied by Rotech based on customer specification. Rotech can’t be liable the installation
of pump and equipment in any hazardous environment. Customer has to consult engineers before purchasing for proper
pump application.

CONTENTS
WARRANTY CLAUSE | LIMITED LIABILITY
INTRODUCTION OF PUMP 01
Pump Safety Tools and Procedure
Model Relationship Chart
RECEIPT AND STORAGE 03
Receipt of Pump and Equipment
Storage of Pump and Equipment
INSTALLATION 04
Preparation
Foundation
Coupling Alignment Procedure
Piping
OPERATION 08
Preparation for start-up
Initial Starting
Final Alignment
Stuffing Box
Cartridge Mechanical Seal
Impeller Clearance
Priming
Start Up
Shut Down
MAINTENANCE 13
Bearings
Shaft Seals
Mechanical Seals
Assembly Troubleshooting

APPENDIX
APPENDIX 1 16
Centrifugal pump troubleshooting
Maintenance and Repair
Assembly Procedures
APPENDIX 2 21
Interchangeability of ANSI 1196 Series pumps
STR Exploded view and part list
MTR Exploded view and part list
LTR Exploded view and part list
APPENDIX 3 36
Maintenance instructions for Inpro/Seal® “VBX” bearing isolators
Details of Operations
Disassembly Procedures
Installation Procedures
APPENDIX 4 37
Dimensional Data
Baseplate Related Dimensions
APPENDIX 5 41
Construction Details
Shaft End Play
Shaft Runout Tolerances
Stuffing Box Related Dimensions
Bearing Fits & Tolerances
APPENDIX 6 44
ANSI 1196 LF Coupling Guards
Assembly Procedures
Disassembly Procedures

INTRODUCTION OF PUMP
Rotech’s 1196 SERIES ANSI chemical process centrifugal pumps are designed for pumping various types of chemicals,
hydrocarbon, slurries and other liquid. This pump has back pull out design enable to pull out from operation without
disturbing piping.
Pump Safety Tools & Procedure
• Insulated work gloves when handling hot bearings or
using bearing heater.
• Heavy work gloves when handling parts that have sharp
edges, especially impellers
• Safety glasses (with side shields) to protect eyes,
especially in machine shop areas.
• Steel-toed shoes to protect feet when handling parts
heavy tools, etc.
• Any other equipment needed to protect against fluids.
• Make sure OSHA type coupling Gaurd is being installed
before operating a pump
• Do not try to adjust or match piping by applying force to
make connection with a pump
• Use only fasteners of proper size & material
• Ensure there are no missing fasteners
• Beware of corroded or loose fasteners
• Do not operate below minimum rated flow, or with
suction / discharge valves closed
• Do not open vent or drain valves, or remove plugs while
the system is pressurized
Always Lockout Power
• Ensure pump is isolated from the system & pressure is
relived before disassembling pump, removing plugs, or
disconnecting piping.
• Use proper lifting & supporting equipment to prevent
serious injury
• Observe proper decontamination procedures
• Know & follow company safety regulations
FOREWORD
Rotech ANSI pumps are designed and manufactured for
optimum performance and long, trouble-free service.
Preventive maintenance is a key factor for long life and
safe operation of pump.. This manual is provided as a
guideline for proper installation, operation and mainte-
nance. THIS MANUAL MUST BE READ AND UNDER-
STOOD BEFORE INSTALLING AND OPERATING ANY
Rotech 1196 SERIES ANSI chemical process pumps.
Rotech pumps & systems Inc SHALL NOT BE LIABLE
FOR PHYSICAL INJURY, DAMAGE OR DELAYS CAUSED
BY A FAILURE TO OBSERVE THE INSTRUCTIONS FOR
INSTALLATION, OPERATION, AND MAINTENANCE
CONTAINED IN THIS MANUAL.
PRECAUTIONS
NEVER apply heat to remove impeller. It may explode due
to trapped liquid.
NEVER use heat to disassemble pump. Explosion could
occur due to trapped liquid.
NEVER operate pump without coupling guard correctly
installed.
NEVER operate pump beyond the rated conditions to
which the pump was sold.
NEVER start pump without proper prime (sufficient liquid
in pump casing).
NEVER operate pump below recommended minimum
flow or when dry.
ALWAYS lock out power to the motor before performing
pump maintenance.
NEVER operate pump without safety devices installed.
NEVER operate pump with discharge valve closed.
NEVER operate pump with suction valve closed.
DO NOT change conditions of service without approval of
an authorized Rotech representative.
Rotech is not responsible for the Personal injury
will result if procedures outlined in this manual are
followed or not followed.
! WARNING !
Always wear SAFETY APPAREL
COUPLING GAURDS
FLANGED CONNECTIONS
Normal OPERATION
Be careful WHILE MAINTENANCE
01

MODEL RELATIONSHIP CHART
02
CASING
# Self-venting
# Top centerline discharge
# Integral foot support
# Self-venting
# Centerline discharge
# Fully confined gasket
# Integral foot support
# Integrally cast priming
chamber permits self-priming
1196 1796 1196 LF
# Self-venting
# Top centerline discharge
# Fully confined gasket
# Integral foot support
IMPELLER # Open impeller
# Threaded to shaft
# Sealed with Teflon o-Ring
# Open impeller
# Threaded to shaft
# Sealed with Teflon o-Ring
# Radial vanes/balance holes
COVER
Adaptor
Power Ends
Available with : -
# Stuffing box cover designed for packing
# Sight glass shows oil level
# Sealed with labyrinth oil seal

03
RECEIPT AND STORAGE
RECEIPT OF PUMP & EQUIPMENT
Receiving of Pump
Immediately after receipt of pump, please check following:
1. Check Name plate details on pump.
2. Please check name plate details on which Pump Model number, Size of pump, Flow , Head, Serial number, HP of
Motor, RPM and compared with Purchase order just to make sure you have received right pump against order to avoid / any
issue.
3. Check pump crate and pump & other equipment is in good condition and did not damage in transportation. If there is any
damage, immediately report to shipper Rotech Distributor or your supplier.
4. Use proper procedure unloading pump and equipment from truck.
STORAGE OF PUMP AND EQUIPMENT
Store pump in a cool and dry area free from heat, dirt .Do not remove packing if not necessary. Rotate pump shaft at least
once a week to maintain protective film of oil or grease on bearings.
If you intend to store for long term, use proper storage treatment for safeguard of pumps.
Please follow proper handling procedure as follows:
Fig. 1a Fig. 1b
Fig. 1c

04
INSTALLATION
PREPARATION
When preparing your pump for installation, Please make sure the discharge and suction connections must be clean and
free of anything that might prohibit a tight connection. This is especially important on the suction, air leaks can cause a
pump to operate poorly or to lose prime completely.
If your pump has just been taken out of storage all of the grease or preservative must be removed from the ball bearing hous-
ing. The ball bearing housing must then be thoroughly cleaned with kerosene or carbon tetrachloride & re-lubricated. On
packed pumps, it will be necessary to clean the shaft sleeve & stuffing box with kerosene or carbon tetrachloride & then
repack.
FOUNDATION
Whenever possible locate pump near the source of supply as possible. Allow enough space for inspection & maintenance
of pump. Baseplate mounted pumps are usually grouted on a concrete foundation that has been poured on a solid footing.
The foundation should be of heavy construction to reduce vibration and must be rigid enough to resist the torque it may be
subjected to. The foundation should be 2" to 6" larger than the base, depending on the size of the base. A space of
approximately 2" should be left between the foundation and the bottom of the base for grouting. Use a pipe sleeved bolt as
shown in Fig. 2 to within 1/2" of the base for a foundation bolt.
LEVEL BASEPLATE
Pump alignment is very important and special care should
be taken . Once the pump is set the only means of adjusting
is by shimming.
1. Place 12 wedges on the foundation, one wedge on each
side of every mounting bolt. Place wedges so that baseplate is
3/4" above foundation to allow for adequate grouting (Fig. 3).
2. Carefully lower the baseplate onto mounting bolts.
3. Level baseplate to within 1/8" over the length and to within
.088 in over the width by adjusting the wedges.
4. Hand tighten bolts.
Rectangular washer
welded to bolt
Pipe sleeved bolt
(pipe sleeve 2 1/2 times larger than bold)
Base
Foundation
Wedge
Fig. 3
Fig. 2
Note wedge
should be 2"
taper per Ft.
3/4" to allow for
grouting

05
ALIGNMENT CHECKS
Initial Alignment (Cold Alignment)
•Before grouting baseplate to make certain alignment
can be obtained
•After grouting baseplate to make sure no changes have
occurred.
•After connecting piping to ensure that alignment
hasn’t been altered by pipe strain. If alignment has
changed alter piping to remove strain.
Final Alignment (Hot Alignment)
•After first run to obtain correct alignment when equip-
ment is at operating temperature.
ALIGNMENT CRITERIA
Good alignment is achieved when the differences
between the readings is .010 or less when the pump is at
operating temperature. However, during the installation
phase it is necessary to set the parallel alignment in the
vertical direction to a different criteria. This is due to the
differences in the expansion rates of the pump and the
motor. The recommended cold settings for electric motor
driven pumps is shown in Table 1.0
Pumpage Temperature Set Driver Shaft
50°F (10°C) .002 in. Low
150°F (65°C) .001 in. High
250°F (120°C) .005 in. High
350°F (175°C) .009 in. High
450°F (218°C) .013 in. High
550°F (228°C) .017 in. High
650°F (343°C) .021 in. High
ANGULAR ALIGNMENT
Check angular alignment with a micrometer or caliper.
Measure from the outside of one flange to the outside of
the other flange at intervals around the periphery of the
coupling, DO NOT rotate the coupling. The difference
between the maximum and the minimum must not
exceed .010".
PARALLEL ALIGNMENT
Check parallel alignment by placing a straight edge
across the two coupling flanges and measure the offset
at various points around the periphery of the coupling.
DO NOT rotate the coupling. If offset exceeds .010"
realign the coupling.
If a correction is necessary to either the angular or paral-
lel alignment, remember to recheck the other for proper
alignment.
TABLE 1: COLD SETTING OF PARALLEL
VERTICAL ALIGNMENT
COUPLING ALIGNMENT PROCEDURE
For trouble-free operation of this unit, proper alignment must be attained. Proper alignment is the responsibility of the
installer and user of this pump.
1. Apply Anti-seizing compound on jack screw to allow for
easy removal after the grout has cured.
2. Cut 6 or 8 round plates from barstock to set the jack
screws on. Chamfering the edges of the plate is recom-
mended to reduce stress concentrations.
3. Set the baseplate on the foundation, then raise it 3/4" to
1 1/2" using the four corner jack screws. At this time, the
two center jack screws should not be touching the
foundation.
4. Place one machinist level lengthwise on a single motor
pad, & another across the ends of both motor pads. (It is
important that the surface being leveled is free of all
contaminants, such as dust, to ensure that your reading
is accurate.)
5. Adjust the four jack screws in order to level the motor
pads to zero in both directions.
6. Turn down the center jack screws until they are resting
on their metal plates.
7. Move the two levels to the pump pads. Place one level
lengthwise on a single pad, and the other across the
middle of both pump pads.
8. Adjust the jack screws to level the pump pads in both
directions.
9. Install the anchor bolts until they are hand tight.
10. Recheck the motor pads for level measurements.
11. Continue adjusting the jackscrews & anchor bolts
until all level measurements are within the requirement
of 0.002 on in / ft.
Before starting any alignment procedure,
ensure that the motor power is locked out. Failure to do
this will result in serious physical injury.
! WARNING !

06
ALIGNMENT TROUBLESHOOTING
GROUT BASEPLATE
1. Clean the areas on the baseplate that will contact grout. Do not use oil-based cleaners because the grout will not bond to
it.
2. Build a form around the base as illustrated in Fig. 4 Then thoroughly wet the foundation.
3. Pour grout into form being sure that it flows under the base. Fill to within 3/4" to 1" from the bottom of the base.
4. Allow grout to set for 48 hours.
5. Recheck coupling alignment, make any adjustments that may be necessary and tighten foundation bolts securely.
From
3/4” to 1” Grout
Fig. 4
PIPING
Guidelines for piping follow given in the “Hydraulic
Institute Standards” and must be reviewed before
installing pump.
1. All piping must be supported independently of the
pump.
2. Before connecting the piping to the pump, ensure that
grout has hardened and the foundation bolts have been
tightened.
3. When handling liquids at high temperatures, it is
recommended that expansion loops or joints be properly
installed in suction and/or discharge lines so that linear
expansion of piping will not draw pump out of alignment.
4. On pumps handling corrosive liquids, the piping
should be arranged to allow for flushing prior to removal.
5. Clean all pipe parts prior to installation.
Never force piping into position by pulling it in place
with the pump suction & discharge flange bolts. This
will cause misalignment between pump & driver
which will adversely effect the operation of the unit
resulting in physical injury and damage to the
equipment.
! WARNING !
Problem Probable Cause Solution
Cannot obtain horizontal
alignment, angular of parallel
The bolts holding the
driver feet are bound.
Loosen pump hold down bolts & slide pump & driver until
horizontal alignment is achieved.
Baseplate not leveled
properly, probably twisted.
Determine which corner(s) of baseplate are high or low &
adjust properly, then realign.

07
SUCTION PIPING:
1. Properly installed suction piping is necessary for
trouble-free pump operation. Flush suction piping before
connection to the pump.
2. Never place a pipe line elbow in the horizontal plane
directly at the pump suction. Use a straight pipe 4 to 6
pipe diameters long between the elbow & the pump
suction.
3. Use suction pipe one or two sizes larger than the pump
suction, with an eccentric reducer, sloping side down, at
the suction flange (Fig. 7). Suction piping should never be
smaller than the pump suction.
4. Never throttle pump on the suction side, always control
flow by throttling on the discharge side of the pump.
When using a strainer on the suction, install it as close to
the pump as possible & select a strainer with a net area of
at least four times that of the suction pipe.
5. Whenever possible the end of the suction should be a
minimum of 3’ below the liquid level (Fig 5). The liquid
near the pump suction should be free from agitation to
prevent air entering the suction line.
6. Liquid coming back into the reservoir should not enter
near the pump suction pipe, & the liquid should not drop
from a high level (Fig. 6).
7. If a foot valve is not used in the suction line, it is good
practice to bell out the suction pipe to lower the entrance
velocities at the inlet (Fig. 5).
Fig. 5
SUCTION LIFT CONDITIONS
1. Pipe must be free from air pockets.
2. Pipe must slope upwards to pump.
3. All connections must be air tight.
4. Whenever possible avoid dynamic suction lifts of more
than 12’.
5. A means of priming the pump must be provided.
SUCTION HEAD/SUCTION CONDITIONS
1. An isolation valve should be installed in the suction
pipe at least four diameters from the suction to allow
closing of the line for pump inspection and maintenance.
2. Pipe must be free from air pockets.
3. Piping should be level or slope gradually downward
from the source.
4. No part of the piping should extend below pump
suction flange.
5. The size of the entrance from the supply should be one
or two sizes larger than the pipe.
6. To prevent vortices and air entrainment at the supply,
the entrance from the supply must be adequately
submerged below the liquid surface.
DISCHARGE PIPING
1. A gate valve & check valve should be installed in the
discharge line. The check valve should be installed
between the gate valve and the pump (Fig. 6) this will
allow for inspection of the check valve. The gate valve is
required for priming, flow regulation, & for maintenance
of the pump. The check valve is required to prevent pump
or seal damage from reverse flow through the pump
when the motor is turned off.
2. Discharge pipe increasers should be connected
between the pump & the check valve (Fig.7).
3. If quick closing valves are installed in the system, cush-
ioning devices should also be installed to protect the
pump from surges & water hammer.
Fig. 6
FINAL PIPING CHECK
After all piping connections have been made to the
pump:
1. Rotate the shaft by hand to ensure that there is no
binding and all parts are free.
2. Recheck pump alignment to detect any pipe strain, if
pipe strain exists correct piping.
NPSHA must always exceed NPSHR as shown on
performance curves. Reference Hydraulic Institute for
NPSH and pipe friction values needed to evaluate
suction piping.
! WARNING !
Return Return
Wrong
Correct
D/2
3” Min
Low Liquid
Level
D

08
OPERATION
Priming Of Pump
Centrifugal pump will require to prime to operate
satisfactorily. Do not try to prime pump when operating
and DO NOT under any circumstances operate the pump
without being completely primed. Some of the most
common methods of priming are flooded suction, foot
valve in suction line, ejector (steam, water, or air operat-
ed), and vacuum pump.
With Flooded Suction:
1. Slowly open the gate valve in the suction line.
2. Remove the air vent in the top of the pump casing to
release entrained air.
3. Close the air vent once liquid starts to flow out of it.
With Foot Valve In Suction Line:
1. Open air vent on pump casing.
2. The pump and suction line must be filled with the
liquid being pumped. It is recommended to fill the
discharge pipe several feet above the pump discharge.
3. After filling pipe and pump close air vent.
4. The pump will remain primed unless the foot valve
leaks or if the liquid is contaminated & does not allow foot
valve to close tight.
With an Ejector:
1. Mount ejector at the highest point in the impeller
housing to ensure removal of all the air in the casing &
suction pipe.
2. Operate ejector with gate valve in discharge line
closed.
3. Operate until ejector discharges a full steady flow of
liquid.
4. On pumps using packing it may be necessary to
tighten packing gland to prevent pulling of air through
shaft clearances. After pump is primed properly loosen
gland to achieve a slight trickle of liquid through stuffing
box.
With a Vacuum Pump:
1. Mount vacuum pump at the highest point in the
impeller housing to ensure removal of all the air in the
casing and suction pipe.
2. Gate valve in discharge line must be closed.
3. After pump is primed, valves between vacuum pump &
Rotech pump must be closed.
4. On pumps using packing it may be necessary to
tighten packing gland to prevent pulling of air through
shaft clearances. After pump is primed properly loosen
gland to achieve a slight trickle of liquid through stuffing
box.
Operating pump dry will cause damage to mechanical
seal and may cause rotating parts to seize.
! WARNING !
PREPARATION FOR START-UP
Check Rotation
1. Please check wiring of motor as per motor manufac-
ture’s specifications & according to local regulations.
2. Lock out power to driver
3. Disconnect motor/pump shaft coupling to prevent dry
operation of the pump and reverse rotation.
4. Make sure everyone is clear. Jog motor starter, pump
must rotate clockwise when viewing from the driving end
looking over the motor. Direction arrows are cast in
impeller housings.
Check Impeller Clearance
Before starting pump the impeller clearance must be
checked. The pump efficiency is maintained when the
proper impeller clearance is set. When pumping liquids
under 200°F (93°C), the impeller front clearance for the
STR, MTR, and LTR is between .010" and .015". If the
impeller front clearance is not set between the above
values significant performance degradation will result.
When pumping liquids above 200°F (93°C) the front
impeller clearance when cold must be set per Table 2.
This is necessary to allow for differential expansion due to
the higher operating temperature. See the Maintenance
section for correct impeller adjustment procedure.
TABLE 2: IMPELLER CLEARANCES
Coupling Of Pump And Motor
1. Lock out power to motor to prevent accidental rotation
& physical injury.
2. Install and lubricate coupling per manufacturer’s
instructions.
3. Install coupling guard (see Appendix 3 Coupling Guard
Installation instructions).
Cold Temperature Clearances For
Service Temperature Clearance
Up to 200°F (93°C) .010" - .015"
200°F to 250°F (121°C) .012" - .017"
250°F to 300°F (149°C) .014" - .019"
300°F to 350°F (177°C) .016" - .021"
350°F to 400°F (204°C) .018" - .023"

19
enough for the pump and motor to reach operating
temperature.
2. Check alignment while unit is still hot.
3. Make any necessary adjustments and reinstall the
coupling guards.
STUFFING BOX
Packed Box
Braided packing is supplied as standard equipment on
all pumps. Install gland bolt nuts finger-tight only. Adjust
the gland bolt nuts during start-up to achieve 40-65 drops
of leakage per minute. Specific packing type is depend-
ent on pH, temperature, etc. of the liquid being pumped.
Clean and cool pumpage may be used to lubricate the
packing. If the pumpage is not suitable, you must supply
an external source of lubrication.
CARTRIDGE MECHANICAL SEAL
Refer to the manufacture’s installation, operating, and
maintenance instructions. Failure to do so can result in
environmental damage, personal injury, and seal
malfunction and / or seal failure.
Start Up
Read, understand and follow the manufacture’s installa-
tion, operation, and maintenance instructions.
Never operate a pump without the coupling guard
properly installed. Personal injury can occur if pump
is run without coupling guard.
! WARNING !
Determine the effects that a failure of the mechanical
seal might have on the environment and personnel
and correct conditions to prevent personal injury.
! WARNING !
Do not allow packing to run dry. It must be lubricated.
See ANSI/ASME B73.1 M-1984 for proper seal flush
plans.
CAUTION
DO NOT operate pump below minimum rated flows or
with suction or discharge valves closed. These
conditions could create an explosive hazard due to
vaporization or pumpage & can quickly lead to pump
failure and physical injury.
! WARNING !
INITIAL STARTING
1. The gate valve in the discharge line should be closed &
gradually opened as the motor reaches full speed
(approximately 5 to 10 seconds). After the pump has been
in operation & the suction & discharge lines are filled with
liquid, it is not necessary to close the gate valve when
starting.
2. Start motor & immediately observe pressure gauges. If
discharge pressure is not quickly attained stop pump,
reprime, & attempt to restart.
3. If your pump is packed, loosen packing gland screws to
allow free leakage. Then tighten screws uniformly on
packing gland until leakage is reduced to approximately
30 drops per minute. Never tighten packing enough to
stop all leakage, a slight leakage is required to lubricate
packing and prevent scoring of shaft sleeve.
4. Check pump for vibration levels, bearing temperature,
& excessive noise. If normal levels are exceeded, shut
down & investigate.
OPERATION
Always vary the capacity with gate valve in the discharge
line. Never restrict intake flow.
If the specific gravity of liquid being pumped is greater
than originally assumed or if the rated flow is exceeded,
the motor may overload.
To prevent damage from cavitation or recirculation,
always operate pump at or near the rated conditions.
Drain all liquid from inside pump if it will be exposed to
freezing conditions while idle. The conditions could
cause liquid to freeze and damage the pump. Liquid
inside cooling coils, if supplied, should also be drained.
FINAL ALIGNMENT
1. Run the unit under actual operating conditions long
Pump Model
XLRLTRMTRSTR
5/16” 3/8” 3/8” 7/16”Packing Size
Only work on seal when the pump is locked out and
the seal is depressurized.
! WARNING !

10
FEELER GAUGE TECHNIQUE
1. Lock out power to the pump driver.
2. Remove the coupling guard.
3. Loosen jacking bolts (370D) and jam nuts (423).
4. Tighten bearing housing bolts (370C) evenly, while
slowly rotating the shaft until the impeller starts to rub on
the casing (100).
5. Using a feeler gauge, set the gap between the 3 hous-
ing bolts (370C) and the bearing housing (134). (Refer to
Table 6 for settings.)
6. Tighten jack bolts (370D) evenly until bearing housing
backs out and contacts the bearing housing bolts (370C).
7. Tighten jam nuts (423) evenly, rotating the shaft to
make sure the assembly turns freely.
8. Reinstall the coupling guard.
9. Unlock power to the pump driver.
Fig. 7
Storage, Assembly & Disassembly of Mechanical
Seal:
Read, understand & follow the manufacture’s installa-
tion, operation and maintenance instructions.
Type 1: Installation of Mechanical Seal:
1. MTR, LTR, XLR Slide the stuffing box cover over the
shaft/sleeve. Bolt the cover (184) to the frame adapt-
er(108). STR Slide the 6" or 8" stuffing box cover (184) with
adapter ring (108) over shaft and bolt to bearing.
2. Mark / scribe the shaft at the face of the stuffing box.
3. Unbolt and remove the stuffing box cover.
4. Locate the installation reference dimension on the seal
installation drawing. Normally this is the dimension from
the face of the stuffing box to the rear of the seal.
5. Mark the shaft with a felt marker or marking tool at the
dimension (i.e. 1/32").
6. Lubricate the shaft with silicon grease or soapy water.
Slide the seal onto the shaft. Line up the face of the seal
with your mark and secure with set screw.
7. Reassemble the pump.
IMPELLER CLEARANCE
Over time a change in pump performance may be
noticed. Performance can usually be renewed by reset-
ting the impeller clearance.
Impeller Clearance Setting
A gradual loss in head &/or capacity can occur. You may
restore performance by adjusting the impeller clearance,
which is the measurement between the impeller vanes
and the surface of the casing.
Lock out motor power to prevent accidental startup
and physical injury.
! WARNING !
Pumpage Temperature STR MTR / LTR
0.005 (.13)
0.005 (.13)
0.005 (.13)
0.006 (.16)
0.007 (.18)
0.008 (.21)
0.009 (.23)
0.011 (.28)
0.013 (.33)
.008 (.20)
.008 (.20)
.008 (.20)
.099 (.23)
.010 (.26)
.011 (.28)
.012 (.30)
.014 (.36)
.016 (.41)
-20 to 150° F (-29-66° C)
Up to 175° F (80° C)
Up to 200° F (93° C)
Up to 225° F (107° C)
Up to 250° F (121° C)
Up to 275° F (135° C)
Up to 300° F (149° C)
Up to 350° F (177° C)
Up to 400° F (204° C)
134 423
370D
228 370C

11
7. Tighten the jack bolts (370D) evenly until they contact
the frame. Continue to tighten until the dial indicator
reads the proper clearance.
8. Tighten bearing housing bolts (370C) evenly; then
tighten jack bolts (370D) evenly. Be sure the dial indicator
does not move from the proper setting.
9. Rotate the shaft to be sure it turns freely.
10. Reinstall the coupling guard.
11.Unlock power to the pump driver.
DIAL INDICATOR TECHNIQUE
1. Lock out power to the pump driver.
2. Remove the coupling guard.
3. Place a dial indicator with a magnetic base on the
pump base plate. Place the indicator against the end of
the pump shaft or coupling face.
4. Loosen jack bolts (370D) and jam nuts (423).
5. Tighten bearing housing bolts (370C) evenly while
slowly rotating the shaft until the impeller starts to rub on
the casing (100).
6. Set the dial indicator to zero.
Fig. 8
134 423
370D
370C
228

12
7. Adjust the discharge valve as needed while checking
piping for leaks.
8. Check mechanical operation of the pump and motor.
Shut Down
1. Gradually close the discharge valve and turn off the
power to the motor.
2. Lock out power to the pump driver.
Priming
Prior to starting a centrifugal pump, it is imperative that
you prime the pump by flooding the suction piping and
casing with fluid. Priming will occur when you open the
suction isolation valve and the packing sealing liquid
valve.
Start Up
1. Rotate the pump by hand; making sure that the
rotating element is spinning freely.
2. Be sure the suction valve is open.
3. Partially close the discharge valve.
4. Unlock power to the pump driver.
5. Slowly open the discharge valve as soon as the motor
reaches operating speed.
6. Check stuffing box leakage and adjust, if necessary, to
achieve leakage of 40-65 drops per minute.
Do not operate the pump without liquid in the casing.
CAUTION
Do not operate the pump with the discharge valve
closed for an extended period of time.
CAUTION
Do not operate the pump without the proper guard.
See ANSI/ASME B15.1-1996.
! WARNING !

13
MAINTENANCE
The bearing temperature will usually rise after regreasing
due to an excess of grease. Temperatures should return
to normal after the pump has purged the excess grease.
Never mix greases of different consistency or thickener. If
it is necessary to change, remove all of the old grease
from the housing.
SHAFT SEALS
Packed Pumps
DO NOT STOP LEAKAGE! Packed glands drawn up too
tight increases power consumption, increases wear on
shaft, and shortens life of packing. When leakage can no
longer be controlled by drawing up on the packing gland
add another ring of packing to the stuffing box. After
further operation and leakage again can no longer be
controlled replace the packing by using the following
procedure:
1. Remove all old packing from the stuffing box. Clean
box and shaft sleeve thoroughly and examine for wear.
Replace shaft sleeve if wear is excessive. Check bearing
by lifting shaft up and down; do not expect packing to act
as a bearing.
2. Use the right cross section of packing, Rotech uses
Non-Asbestos packing as our standard for general
purpose applications. Packing for special applications
available, consult factory.
3. When using coil or spiral packing always cut the
packing into separate rings. Never wind a coil of packing
into a stuffing box. Rings can either be cut with butt
(square) joint or diagonal joints. (Fig. 9) The best way to
cut packing is on a mandrel the same diameter as the
Fig. 9
BEARINGS
All pumps are lubricated at the Rotech plant and should
not require additional lubrication for approximately 1200
hours of operation. A well planned maintenance sched-
ule can only be devised after the first six months of opera-
tion and the lubrication record review at that time. Each
pump installation is unique and requires individual atten-
tion to set up the proper lubrication schedule for each
specific installation. About once every year it is recom-
mended that the bearings be cleaned and flushed with
carbon tetrachloride and then relubricated.
Oil Lubricated
A high quality turbine oil with rust and oxidation inhibi-
tors, such as Mobil DTE 26 (300 SSU) or its equivalent,
should be used. Fill bearing frame with oil until level is at
the center of the sight glass.
TABLER 3: OIL CAPACITY
TABLER 4: LUBRICATING OIL DETAILS
or any SAE 30 Non-Detergent oil.
Grease Lubricated
1. When regreasing ensure the grease container,
greasing device, and the grease fittings are clean to
prevent impurities from entering the bearing housing.
2. Remove the 2 grease relief plugs from the bottom of
the bearing frame.
3. Fill both grease cavities with Chevron SRI #2 or
equivalent until fresh grease comes out of relief holes.
4. Reinstall the grease relief plugs.
5. Check the frame seals to ensure they are seated in the
bearing housing. If not, press into place with drains
located at the bottom.
Manufacturer Oil
Chevron Turbine Oil GST 68
Atlantic Richfield DURO 68
EXXON TERESSTIC 68
Texaco INC Regal R & O 68
Mobil DTE Heavy - Medium
Amoco Oil Amoco Industrial Oil # 68
Frame Pints
MTR 1.25 Approx
STR 0.55 Approx
Butt Joint
Diagonal Joint

14
9. Replace packing when leakage cannot be controlled by
further take up on the gland.
Some of the most common reasons for packing
failure are:
•Improper installation
•Uneven gland adjustment
•Shaft misalignment and shaft whip
•Improper selection of packing for liquid
•Improper selection for pressure and temperature
•Contaminated liquid (dirt, abrasives, etc.)
•Operation without fluid
MECHANICAL SEALS
1. Blue the shaft sleeve Scribe a mark at the face of stem
plate to use as reference for installation of mechanical
seal.
2. Remove the impeller, shaft sleeve, and stem plate.
3. Install stationary seat of mechanical seal into seal
gland per seal manufacturer’s instructions.
4. Slide seal gland with stationary seat and seal gland
gasket onto shaft.
5. Install mechanical seal and locking collar onto shaft
sleeve per seal manufacturer’s instructions.
6. Install shaft sleeve with mechanical seal onto shaft.
7. Then mount stem plate to stem.
8. Reinstall impeller following same method previously
used.
9. Mount seal gland to stem plate.
Some of the most common reasons for seal
failure are:
•Improper installation
•Shaft misalignment and shaft whip
•Wrong selection for liquid pumped
•Dirt or grit between faces
•Seal gland tightened unevenly so stationary seat is not
perpendicular to shaft
•Operation without fluid
shaft sleeve. Hold the coil packing tightly and firmly on
the mandrel but do not stretch excessively. Cut the ring
and try it in the stuffing box to make certain it fills the
packing space properly with no gap in the joint at the
O.D. of the ring. It is necessary that the rings be cut to the
correct size, otherwise service life is reduced.
4. Install one ring at a time. Make sure it is clean and has
not picked up any dirt in handling. If clean oil is available,
lubricate the shaft and inside of the stuffing box. Seat
rings firmly. (Except for TFE filament and graphite 19 yarn
packings which should be snugged up very gently. Then
wrench in gradually.. .after the pump is back in opera-
tion.) Joints of successive rings should be staggered and
kept at least 90° apart. Each individual ring should be
firmly seated with a tamping tool. When enough rings
have been individually seated so the nose of the gland will
reach them, individual tamping should be supplemented
by the gland. Never depend entirely on the gland to seat a
set of rings properly-this practice will jam the last rings
installed, but leave the bottom rings loose in the box.
5. After the last ring is installed, take up bolts finger tight
or very slightly snugged up. Do not jam the packing into
place by excessive gland loading. Start pump, and take
up bolts until leakage is decreased to a minimum. Make
sure gland bolts are taken up evenly, stopping leakage
entirely at this point will cause packing to burn up.
6. Allow packing to leak freely when starting up a newly
packed pump. Excessive leakage during the first hour of
operation will result in a better packing job over a longer
period of time. Final adjustment should allow approxi-
mately 30 drops per minute to leak from the packing.
7. When specified, Rotech can provide means of lubricat-
ing the shaft and packing through a lantern ring by
supplying water, oil, grease, or liquid handled in the
pump.
8. If the stuffing box has a lantern ring, make sure the
lantern ring, as installed, is slightly behind the fluid inlet
as gland pressure is applied. (Fig 10)
Fig. 10

15
6. Check total travel of impeller in the casing, if it is more
than .030 in. improper parts or installation or too much
pipe strain is present. Determine cause and correct
before proceeding.
7. Adjust impeller clearance using procedures in the
Maintenance section of this manual.
8. Replace any auxiliary piping, and fill pump with proper
lubricant as outlined in the Maintenance section of this
manual.
9. Check to see that it is possible to rotate the shaft easily
by hand, if so continue with startup of pump in Operation
section of this manual. If shaft does not turn easily deter-
mine cause and correct
ALL MODELS
1. Clean fits between rotating assembly and impeller
housing (26).
2. Place stem plate gasket 24 number stem.
3. Loosen locking and jacking screws in the bearing
frame.
4. Install rotating assembly in impeller housing (26).
Torque bolts according to values in Table on page 13.
(Fig. 7)
5. Replace shims under frame feet and tighten frame to
baseplate. A dial indicator should be mounted to meas-
ure the distance between the top of the frame and the
baseplate. This measurement shouldn’t change as bolts
are tightened.
ASSEMBLY TROUBLESHOOTING
Pump and components are heavy. Serious physical
injury or damage to equipment could occur from
failure to properly lift and support pump. Steel-toed
shoes must be worn at all times.
! WARNING !
Problem Solution
Excessive shaft end play. Bearing internal clearance too great.
Snap ring loose in housing groove.
Replace bearings with correct type.
Reseat.
Excessive shaft runout. Sleeve worn.
Shaft bent.
Replace.
Replace.
Excessive bearing frame runout. Shaft bent.
Bearing frame flange distorted.
Replace.
Replace.
Excessive stem runout. Corrosion. Replace.
Excessive stem plate runout. Stem plate not properly seated in stem.
Corrosion or wear.
Reseat.
Reseat.
Cause

16
WEAR EYE PROTECTION
Failure to do so can result in serious personal injury.
! WARNING !
Before attempting to service the pump:
1. Follow the shut down procedures.
2. Lock out the power source.
3. Allow the pump to cool.
4. Close the suction and discharge valves.
5. Drain the pump.
! WARNING !
APPENDIX
APPENDIX 1
Centrifugal pump troubleshooting
The following table provides possible solutions for symptoms that you may encounter with your centrifugal pump.
TABLE 5: CENTRIFUGAL PUMP TROUBLESHOOTING
MAINTENANCE AND REPAIR
Disassembly Procedures
1. Lock out power supply at the motor starter.
2. Close off discharge, suction, sealing fluid, and cooling fluid.
3. Drain casing and flush, if needed.
Symptom Cause Solution
Pump not delivering
liquid
Low flow and low
head
Pump loses prime
Bearings are
running hot
Motor requires
excessive amperage
• Re-prime pump
• Install shorter suction pipe
• Change motor wiring
• Back-flush pump
• Remove debris
• Replace or adjust packing
• Replace defective part
• Inspect and replace impeller, if needed
• Replace gasket
• Back-flush pump
• Change motor wiring
• Re-prime pump
• Replace gasket or pipe plug
• Repack moving lantern ring to correctly align
with flush hole
• Realign drive coupling
• Check oil level and or grease
• Readjust or replace packing
• Install throttle or reduce impeller diameter
• Adjust part or replace parts
• Check specific gravity of liquid
• Pump not primed
• Suction lift too high
• Wrong direction of rotation
• Impeller clogged
• Suction line plugged
• Pump not primed correctly
• Air leak in suction line
• Lantern ring in wrong location
• Misalignment
• Low or insufficient lubricant
• Stuffing box gland is too tight
• Total dynamic head is too low
• Rotary part rubbing stationary part
• Liquid is heavier than specified
• Air leak in stuffing box
• Worn suction side plate
• Impeller worn or damaged
• Air leak in suction line
• Impeller clogged
• Wrong direction of rotation