Ampco Pumps Company LF Series Instructions for use

Ampco Pumps
LF & LM Series Pump
Instruction & Maintenance Manual
LF & LM SERIES PUMPS

2 LF & LM SERIES PUMPS
TABLE OF CONTENTS
TECHNICAL DATA ...........................................................................................3
COMPOSITE OF LH PUMP CURVES
60 Hertz.......................................................................................................
50 Hertz.......................................................................................................5
ASSEMBLY DRAWING & PARTS LIST
LF/LM 757 SEAL PUMPS ........................................................................6
LF/LM 758 SEAL PUMPS ........................................................................8
01 seal........................................................................................................10
SEAL DRAWINGS & SEAL PARTS LIST
LF/LM PUMP SEAL ..................................................................................12
01 SEAL....................................................................................................13
SERVICE MAINTENANCE & SCHEDULING
DAILY PUMP MAINTENANCE CHECKS..............................................1
SEMI ANNUAL PUMP MAINTENANCE CHECKS ..............................1
ANNUAL PUMP MAINTENANCE CHECKS.........................................1
MOTOR LUBRICATION SCHEDULE ....................................................1
CONTIGENCY PLAN ...............................................................................1
PUMP INSTALLATION ....................................................................................15
RECEIVING, PUMP LOCATION, INSTALLATION AND DOUBLE
FLUSH OPTION ........................................................................................15
PUMP OPERATION AND SHUT DOWN .......................................................16
757 AND 75 SEAL PUMPS
PUMP DIAMANTLE AND SEAL REMOVAL ........................................17
SEAL INSTALLATION AND PUMP ASSEMBLY ..................................20
LF 401 PUMPS
PUMP DISMATLE AND SEAL REMOVAL ............................................2
ASSEMBLY AND SEAL INSTALLATION ..............................................27
SETTING THE IMPELLER CLEARANCE...................................................29
SOUND PIPING PRACTICES..........................................................................33
TROUBLESHOOTING .....................................................................................3

3
TECHNICAL DATA
SPECIFICATIONS_________________________________________________
MAXIMUM INLET PRESSURE…………………………....……………150 PSI / 10.3 BAR
TEMPERATURE RANGE……………………………...…...- 0º F → 00º F/ - 0º C → 20 º C
MATERIALS OF CONSTRUCTION__________________________________
Casing……….…..………………………………………………….….AISI 316L Stainless Steel
Cover …..…………………………………………………….....….AISI 316L Stainless Steel
Impeller …….…………………………………………………..….….AISI 316L Stainless Steel
Seal Driver……..……………….………...…………………..….....….AISI 316L Stainless Steel
Adapter………….....…………….………..…………………..…...…….AISI 30 Stainless Steel
PRODUCT CONTACT SURFACE FINISH…..……………………….……….32Ra (standard)
Optional Finishes……..….…………………………...25Ra, 20Ra, 15Ra, Electro Polish
O-RINGS & GASKETS……….………………………....…………...…….…...Viton (standard)
Optional Materials………..………………………........EPDM, Buna (others per request)
SEAL____________________________________________________________
Type……...……………………………………………………….…..Internal Single Mechanical
Optional…………………..……………………....…Internal Single Mechanical Cascade
Optional…………………..…………………..…………..…External Double Mechanical
Pressure (flush for double seal).……....……………… -5 PSI / 0.27-0.3 BAR
Water Consumption (flush for double seal).……………… -8 GPH /15-19 LPH
Stationary Seal Material…………………………………………….……….....…Silicon Carbide
Rotating Seal Material…….……………………………………….……….…………......Carbon
Optional Material………………………………………………………....Silicon Carbide
MOTOR___________________________refer to the motor’s owners manual
RECOMMENDED TORQUE VALUES________________________________
Impeller nut LFX-pumps……………………………………………………..90ft-lbs / 122N-m
Impeller nut LF/LM-pumps………….………………………….…………….. 0ft-lbs / 5 N-m
Adapter Clamping bolt………………………...……………………………...…55ft-lbs / 75N-m
Adapter Cap Screws
NEMA 56C-1 0TC/ IEC 80-112.....………… ………….…………….20ft-lbs / 27N-m
NEMA 180TC-280TC/ IEC 132-200………………………………….50ft-lbs / 68N-m
NEMA 320TC-360TC………………………………………………110ft-lbs / 1 9N-m
Shaft Collar Socket Head Cap Screws
NEMA 56C-1 0TC/ IEC 80-112.....…………………….…………..…...6ft-lbs / 8N-m
NEMA 180TC-280TC/ IEC 132-200……………………………….15ft-lbs / 20.5N-m
NEMA 320TC-360TC………………………………………………… 0ft-lbs / 5 N-m
IMPELLER GAP__________________________________________________
R (round internal cavity) LF and LM pumps…..……....0.02” / 0.5mm
V (volute) LF and LM pumps………………………..…....0.04” / 1.0mm
X pumps…………………………………………………..…0.06” / 1.5mm
401 Pump…………………………………………….…...…0.0 ” / 2.0mm
LF & LM SERIES PUMPS

LF & LM SERIES PUMPS

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EXPLODED ASSEMBLY LF/LM PUMPS: R00, R10, R20, R30, R40,
R130, V520,V530 AND V540 WITH THE 757 SEAL
LF & LM SERIES PUMPS

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8 LF & LM SERIES PUMPS
EXPLODED ASSEMBLY LF PUMPS:
V550, X051, X151, X161 WITH THE 75 SEAL

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EXPLODED ASSEMBLY LF 401 PUMPS:

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1 Rotating double spring 8 Single rotating seal o-ring
2 Rotating double seal 9 Backup ring
3 Rotating double o-ring 10 Seal spring
Stationary double o-ring 11 Seal driver inner o-ring
5 Stationary seal 12 Seal driver
6 Stationary seal single o-ring 13 Seal driver outer o-ring
7 Single rotating seal
LF & LM SERIES PUMPS
LF /LM 757 & 75 SEALS:

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1 Rotating double seal driver 8 Rotating single seal
2 Rotating double spring 9 Single seal spring
3 Rotating double o-ring 10 Single seal o-ring
Rotating double seal 11 Seal driver
5 Stationary seal double o-ring 12 Seal driver o-ring
6 Stationary seal 13 Impeller nut o-ring
7 Stationary seal single o-ring
LF & LM SERIES PUMPS
LF 401 SEAL:

1
SERVICE MAINTENANCE AND SCHEDULING
DAILY PUMP MAINTENANCE CHECKS
1. Pump leakage (seal or otherwise)
2. Pressure reading and flow indication
3. Change in operating sound
. Change in bearing temperature
5. Flow through lip seal lines
Motor lubrication schedule: Every 2200Hrs of standard service.
Every 1100Hrs of severe service.
Every 220Hrs of extreme service.
Standard service is 8-16 hours of service and up to 10 ºF/ 0ºC in a clean/little corrosion
atmospheric contamination.
Severe service is 16+ hours of service per day up to 120ºF/50ºC in a moderate dirt/corrosion
atmospheric contamination.
Extreme service is 8-16 hours of service per day over 120ºF/50ºC in a severe dirt, abrasive dust,
corrosive heavy shock or vibration environment.
SEMI-ANNUAL PUMP MAINTENANCE CHECKS
1. Mechanical seal assembly
2. Motor bearing lubrication
ANNUAL PUMP MAINTENANCE CHECKS-INCLUDES SEMI-ANNUAL MAINTE-
NANCE CHECKS PLUS:
3. Remove seal for inspection
. Bearing check
5. Check of axis/running clearance of impeller
CONTINGENCY PLAN
FOR INSPECTION FINDINGS AND BREAKDOWNS, AN ADEQUATE SUPPLY OF
PROBABLE REPLACEMENT PARTS SHOULD BE KEPT ON HAND.
THE MININMUM SPARE PARTS ARE AS FOLLOWS:
1. Single mechanical seal kit
2. Cover gasket
3. Impeller key
IN ADDITION AMPCO RECOMMENDS
. Impeller
5. Cover
6. Impeller nut
Where service cannot be interrupted, a complete stand-by pump unit fully assembled (in a by-
pass line) is recommended.
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PUMP INSTALLATION
Receiving pumps:
Visually inspect shipping crate(s)/pallet(s) for damage. Ampco pumps will be shipped in
boxes labeled Ampco Pumps or in crates. If there is any damage it is imperative to notify the
driver at the time of delivery. Failure to do so will make it difficult, if not impossible, to file a
damage claim and Ampco Pumps will not be held accountable. Please contact Ampco Pumps
shipping department with damage details ASAP.
Once unpacked, carefully inspect the pump for any damage that may have occurred during ship-
ping. Using a 15/16” socket, an extension drive and ratchet turn the impeller nut to make sure
the impeller turns freely. There should be a little noise from the seal which is normal. If there
is metal to metal contact when the impeller is turned shipping damage is likely. Leave the pro-
tective covers on the inlet and discharge connections until the pump is installed and is ready to
be connected to piping.
Pump location:
Install pump in an optimal location. Be sure that there is room around the pump so it can be
accessed readily for maintenance. Ensure that the motor has adequate ventilation. Make sure
the motor type is suitable for the environment in which it is installed.
Electrical installation:
Have a qualified electrician connect the motor using sound electrical practices. Do not test run
the motor with the pump dry. Mechanical seals can be damaged running dry even momentarily.
The pump must be flooded and the flush must be connected with flushing water flowing before
starting the pump. The pump and motor has been selected for a specific environment and sys-
tem application. Changing the environment or system conditions (i.e. change of fluid, change
in head losses, change in NPSHr) can overload the motor. When changing system conditions or
when in doubt, contact Ampco Pumps Company for technical assistance and someone will be
ready to assist.
Double seal flush:
Install flush piping as shown in figure 23.
The regulating valve must be on the inlet end
of the flush. The flush requires -8 gallons
per hour at 1 BAR or 1 .5 PSI. The tubing
on the exit side of the flush has a least 2 ft /
0.6m of height so once the flush has ran there
will be a small amount of water on the seal
and it will not run dry. Direction of flow
should always be from a lower elevation inlet
to a higher elevation outlet to evacuate air if
there is a difference in elevation.
Direction
of flush
Figure 23
2 ft
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Pump operation:
Make sure the pump is clean and free of any foreign matter.
Once the motor, flush and piping all have been properly connected, the flush is turned on and is
visibly flowing (if the pump has a flush option) and the pump has been flooded, the pump can
be momentarily turned on to check the motor rotation. The correct rotation is counter-clock
wise while looking at the pump from the suction end clock wise if looking at the pump from the
motor end.
When the rotation of the motor has been verified to be correct the pump is ready to run continu-
ously for service.
Shut down instructions:
Turn off power supply to the pump.
Close shut-off valves.
Drain and clean pump.
SUCTION END MOTOR END
LF & LM SERIES PUMPS

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PUMP DISMANTALING & SEAL REMOVAL
ATTENTION! BEFORE ATTEMPTING ANY SEVICE ON ANY PUMP OR MOTOR,
DISCONNECT OR LOCKOUT ELECTRICAL POWER TO THE PUMP MOTOR. IF
THE PUMP AND MOTOR ARE TO BE REMOVED AS A UNIT, NOTE THE WIRING
AND CONFIGURATION. USE COLORED OR NUMBERED TAPE TO MARK THE
WIRE CONNECTIONS OF THE PUMP MOTOR AND POWER SOURCE, FOR RE-
CONNECTION.
TOOLS REQUIRED TO DISMANTLE PUMP AND REMOVE SEAL:
Socket wrench for the impeller nut Torque wrench
3/8” round bar 90º o-ring pick
Dead blow hammer (soft face) 7/16” wrench
1. Disconnect electrical power to the pump motor and follow any lockout / tag-
out procedures in place at your facility.
2. Disconnect pump from the suction piping. Drain all fluids from the pump.
3. Loosen and remove
cover wing nuts, cover,
cover gasket and shaft
guard. See figure 1.
. Insert a 3/8” bar in the
hole in the stub shaft. See
figure 2. Turn the impeller
nut with a socket wrench
counterclockwise to re-
move the impeller nut.
Figure 1
Figure 2 LF & LM SERIES PUMPS

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5. Remove the impeller
nut, the impeller nut gas-
ket, impeller, then the key.
This process can be seen in
Figure 3. The seal driver
may be pushing against the
key. With one hand push
the seal driver into the cas-
ing with index and middle
finger on opposite sides of
the shaft. Then with your
free hand remove the key.
6. Pull out the seal driver.
You may have to use a pick
to separate the rotating seal
from the stationary seal,
figure .
7. The rotating seal, o-ring
and spring will come out at
as a single component, fig-
ure 5.
Figure 5
Figure
Figure 3
LF & LM SERIES PUMPS

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8. Push the stationary seal
out from the back of the
pump using an o-ring pick
or your fingers or both.
Pushing on opposite sides
of the shaft with constant
light pressure the best.
Make sure to push outside
of the rear seal face. See
figure 6.
9. Remove stationary seal
once pushed out of its’
bore. See figure 7.
10. Remove the double ro-
tating seal assembly and
spring if the pump has the
double seal option. Check
the condition of the casing,
rotating seal, stationary
seal and double seal. Clean
and remove any foreign
matter before reinstalling
the seal.
Figure 6
Figure 7
Figure 8
LF & LM SERIES PUMPS

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PUMP ASSEMBLY AND SEAL INSTALLATION
When replacing the seal assembly lubricate all o-rings with food grade lu-
bricant to ease assembly. Once the pump is fully assembled turn the stub shaft a
few revolutions by hand making sure it turn relatively freely and nothing is rub-
bing inside the pump. Running the pump with foreign objects in the pump or hav-
ing the impeller making contact with either the cover or the casing will result in
serious damage if not completely destroying the pump. For assembling pumps
with single seals, start at step number .
TOOLS REQUIRED FOR ASSEMBLY AND SEAL INSTALLATION:
1-1/ ” socket wrench Torque wrench
3/8” round bar 7/16” wrench
1. Slide the rotating double spring onto
the stub shaft and use the slot to maneu-
ver the spring behind both rotating drive
pins. There are two seal springs in the
double seal kit. The rotating double seal
spring is the heavier spring.
2. Slide the rotating seal over the shaft
through the casing.
3. Set the slots in the rotating seal over
the drive pins figure 11.
Figure 9
Figure 10
LF & LM SERIES PUMPS
Figure 11