xt7qnk361p0s_600 https://exploreuk.uky.edu/dips/xt7qnk361p0s/data/mets.xml https://exploreuk.uky.edu/dips/xt7qnk361p0s/data/88m6.dao.xml Inland Steel Company 185 Cubic Feet archival material 88m6 English University of Kentucky Copyright has not been assigned to the University of Kentucky  Contact the Special Collections Research Center for information regarding rights and use of this collection. Wheelwright Collection Coal miners -- Housing -- Kentucky. Coal mines and mining -- Appalachian Region -- History. Company towns -- Kentucky -- Wheelwright. Community development -- Kentucky -- Wheelwright. Coal mines and mining -- Kentucky -- Wheelwright General text General 2016 https://exploreuk.uky.edu/dips/xt7qnk361p0s/data/88m6/Box_117/Folder_1/8612.pdf section false xt7qnk361p0s_600 xt7qnk361p0s é“ Emmawefirmm ~

I ‘FOR INSIALLAA'TNIRAII'D OPERATIONS OF 7.

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_ 'GENTRIEIIG'A L} PUMPS; -
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A PAGE
A INSTALLATION..............3
A 0PERAT|ON...............7
A BEARINGS AND LUBRIGATION. . . . . . . . . 14
. A MAINTENANCE AND REPAIR . . . . . . . . . 15
A‘
A LOGATlNG TROUBLE. . . . . . . . . . . . 25
1 A
I. ,
A A ORDERING REPAIR PARTS. . . . . . . . . 27
{A}. I
AAA A REFERENCE LIST or TYPES AND SIZES . . . . . 23
1.. A
A A
AA SEGTIONALVIEWS . . . . . . . . . . . . 31
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5 -i COPYRIGHT 1940 BY ALLIS-CHAL‘AERS MFG‘ CO.
‘* A A
WA
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l _‘V ““357? .7 , $7.: ’g‘fi ,.‘ . v. I
I .' is: g. ' ', g.x‘k‘~\ ‘A‘ K > . > o .4 I
I \ ...“.veWx/N" Motor Driven Type “S”
I ' ”SS-3’ ' ' Pump With Welded Steel ‘
L Base Plate. I
I I
I I
I I
I You have, in your new Allis—Chalmers centrifugal pump, one of I
I the best units available for doing the work for which it was intended. I
I This unit was tested at the factory and found to be in perfect 1
i , . . . . .
I condition, operating satisfactorily at rated capac1ty and head. .
3 With reasonable care it will give you years of low-cost pumping. ‘
I The following data will furnish the information needed to obtain I
the most efficient and trouble-free service from this pumping unit. 4
1" Please study these instructions carefully before putting the unit into .
' service.
" We have tried in this booklet to cover all the essential factors in I
3 the installation and operation of Allis-Chalmers Pumps, but shall I
._ be glad to give special instructions for unusual conditions not ;
i covered. I
. For instructions covering Allis-Chalmers Close coupled SS-Unit .
I pumps, see our instruction book number 5054. For instructions I
II covering the installation, operation, and maintenance of Multi- .
I Stage Boiler Feed Pumps, refer to our special Boiler Feed Instruc- I
II tion Book which will be furnished on request.
For instructions covering axial flow pumps, refer to factory. I
;35 _ 2 '

 I
INSTALLATION
I 5
LOCATION OF UNIT
5. ‘ In selecting a location for the Centrifugal Pumping Unit these
I factors must be considered:
5 The pumps should be as near the water supply as practical so that
I the static suction lift will be low and so that a short direct suction
I pipe may be used. The pump should be located so that a short direct
I suction pipe with the least number of elbows and fittings may be used,
I to minimize head loss from friction. The pump should be placed so
I: that it will be accessible for inspection during operation. Head room
I should be provided when it is necessary to use cranes. The pump
I Should be protected against floods and a motor driven unit should be
I installed in a dry place if possible.
I If the pump is to handle paper stock, it should be located close to
I the supply chest and the suction line should contain as few fittings as
I possible so as to keep the pipe friction on the suction side of the
I pump at a minimum
I FOUNDATION
I The foundation should be sufficiently substantial to absorb any
I vibration and to form a permanent, rigid support for the base plate.
I This is important in maintaining the alignment of a direct connected
t unit. A concrete foundation on a solid base should be satisfactory.
I Foundation bolts of the proper size should be embedded in the
E concrete, located by a drawing or template.
I ALIGNMENT
Any base plate, no matter how heavily it is built, may be slightly
I sprung in shipment, or may be distorted by an uneven support on
1 the foundation, or by uneven tightening of the foundation bolts, or
I by the pull from the pipe connections. So it is necessary to be careful
when installing the pump to secure perfect alignment of the coupling.
A FLEXIBLE COUPLING WILL NOT COMPENSATE FOR
I MISALIGNMENT. Inaccurate alignment of the coupling results
I in rapid wear of the coupling bushings, heating of the bearings and
I loss of efficiency. Therefore, after the pump is fastened on the
‘ foundation it is necessary to see that the shaft of the pump and of the
driving machine are in one line. For this reason the coupling bolts
I. have been left out. Before they are put in, the pump should be com—
pletely connected up to its piping and the base plate leveled up and
I adjusted to position by shims and wedges, so as to bring the two
9 halves of the coupling into perfect alignment. To facilitate checking
I up the alignment a steel gap gauge is provided.
- 3 — .

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Fig. l—Method of Aligning Pump and Motor.
t See that the gap gauge will rest evenly on both coupling flanges all i
l around the surface as shown at “D,” (Fig. 1), then insert the thin l
end of the gauge between the halves of the coupling and see that it >
will enter to the same distance all around the couplings as shown 1
l at “B.” By placing wedges or shims under the base plate in the
I proper positions as at “C” and “A,” it will be possible to bring both ;j
I halves of the coupling into their proper relative positions. As soon as !
these tests show correct alignment the base plate can be grouted in.
However, if the base plate is fastened by means of foundation bolts, 1
I it is necessary to make sure after these bolts are tightened down that ':
l the coupling is still properly aligned before the grouting is put in A
1 m-“ place. Check the rotation of the driver to see , l
; I=!I:a whether it rotates in the direction of the ar- 1'
l ‘ ,9/ ., ,. rows on the pump casing. Not until the pump l
.3 ”fl; is finally bolted down and grouted in on its 1
l _ foundation and the alignment checked, should 1
l ___ the coupling bolts be put in place. Be sure ‘
i - ~--~‘ “__I that the chisel marks on the two halves of i
1 5 : .CE” : the coupling are placed opposite each other. i
r 3 IO 3 i, Whenever the pump or driver, or both, are ‘
i heated in operation, (i.e., when the driver is a ,
i Fig. 1 ArM etho d of steam turbine or pumps are handling hot i
l Installing Coupling. water) the unit should be properly aligned i
. l — 4 —

 under these conditions. This is necessary due to changes in alignment
resulting from the expansion from the cold to the hot conditions.
’1’ DOWELS FOR DRIVING MEMBER
‘ The pump and driver were assembled on the base plate and roughly
‘l aligned before the unit was shipped. The pump is doweled to the
0' base plate, but the driver dowels have been left out. After the
coupling has been carefully aligned and the base plate grouted in and
the alignment checked, the driver dowels must be put in.
l PIPING
l . . . .
I Both suction and discharge pipes should be independently sup-
? ported near the pump so that when the flange bolts are tightened no
2 strain will be transmitted to the pump casing.
1 It is usually advisable to increase the size of both suction and
discharge pipes‘at the pump nozzles in order to decrease the loss of
head from friction, and for the same reason piping should be ar-
l ranged with as few bends as possible and these should be made with
l a long radius wherever possible.
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I NOTE 9‘le POCKET 7
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'1 INSTALLATION
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i “ INSTALLATION
l 0 Fig. 2—Installation of Piping
l
l ‘ _ 5 _
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 WW .__. _.
DISCHARGE PIPING
A check valve and a gate valve should be installed in the discharge
line. The check valve, placed between the pump and the gate valve, W
is to protect the pump from excessive pressure and to prevent water .‘
running back through the pump in case of failure of the driving ma-
chine. The gate valve is used in priming and starting and when the w
pump is to be shut down. It is advisable to close the gate valve be- I
fore stopping the pump when a foot valve or check valve is installed
to prevent water hammer. This is especially important when the
pump is operated against a high static head.
On an automatic water system where a foot valve is used to keep
the pump primed, the check valve should be omitted from the dis-
charge line to prevent the pump from losing its prime if a slight
leakage of the foot valve should occur.
SUCTION PIPING
The suction pipe must be kept free from air leaks. This is particu-
larly important when the suction line is a long one or the static suc-
tion lift is high.
Trouble is often caused by the use of bell and spigot pipe in the
suction line. We recommend screwed or flanged pipe for the smaller
sizes and flanged pipe for the larger sizes or for high suction lifts.
THE SUCTION PIPE SHOULD SLOPE UPWARD TO THE
PUMP NOZZLE. A horizontal suction line must have a gradual rise
to the pump. If other piping is in the way, go under it. Any high
point in the pipe will become filled with air and thus prevent proper
operation of the pump. A STRAIGHT TAPER REDUCER
SHOULD NOT BE USED IN A HORIZONTAL SUCTION
LINE, as it forms an air pocket in the top of the reducer and the
pipe. Use an eccentric reducer instead. (See figure 2.) If an air
pocket is left in the suction pipe when the pump is primed, it will
often start up and pump properly for a time, but it is probable that
a quantity of air will be drawn from the air pocket and up into the
pump, causing the pump to lose its prime. This is especially true ‘
when the pump is primed by the use of a foot valve. But even
'. when it is primed by ejector or vacuum pump a small quantity of 1
air is left in the pocket and this is added to, both from air in the
water released by the partial vacuum in the suction pipe and from
air admitted through minute leaks in the pipe connections that
3 ordinarily would not cause trouble. Small air pockets that may
I cause trouble are formed in the top of any gate valves installed
_ vertically in the suction line. We recommend that the gate valves
in the suction line be laid so that the stems are horizontal. Trouble
i caused by an air pocket in the suction line can usually be stopped
; temporarily by priming and starting the pump several times. This ‘
._ 5 _
l

 will draw out enough of the air in the pocket so that the pump
will operate properly, but the trouble is liable to recur, and such a
pocket should be eliminated.
“7 Check valves should ordinarily have no place in the suction line,
’ although they are sometimes used in serieslparallel operation to re-
‘ i duce the number of valves which are to be operated when changing
‘f from series to parallel operation. THE PUMP MUST NOT BE
THROTTLED BY THE USE OF A VALVE ON THE SUCTION
SIDE OF THE PUMP.

Suction piping should not be installed so that there is an elbow
close to the suction nozzle of the pump except when this elbow
is in a vertical position. An elbow bending either straight up or
straight down is permissible, but one entering at another angle
should not be used. There is always uneven flow around an elbow
and when it is installed in any but a vertical position this unequal
flow causes more water to enter one side of the runner than can
enter the other side, thus causing a thrust which will heat the thrust
bearing and possibly be of sufficient magnitude to cause rapid wear
of the thrust bearing.

FOOT VALVE
When the suction lift is not very high it is frequently advisable
to install a foot valve to facilitate priming. Foot valves should not
be used when the pump is operating against a high static head, as
failure of the power would allow the water to rush back suddenly
causing a heavy water hammer. The foot valve should be of the flap
type rather than of the multiple spring type with a clear passage for
water of at least the same area as that of the suction pipe. Care must
be taken to prevent foreign substances from being drawn into the
pump or choking the foot valve, and for this purpose an efficient
strainer should be provided. When there is any refuse such as sticks,
twigs, leaves, etc., in the water a larger outside screen should be
placed around the suction inlet to prevent choking the strainer.

. This screen should have sufficient openings to keep the flow through
it below two feet per second.

i

0 P E R A T I 0 N
FREEZING
Care should be taken to prevent the pump from freezing during cold i
weather when it is not in operation. It may be necessary, when
there is any possibility of this, to drain the pump casing of its water
during the shut-down period by removing the plugs in the bottom
of the casing and suction passage.
__ 7 _
l

 PRIMING
BEFORE STARTING THE PUMP THE CASING AND SUC-
TION LINE MUST BE FILLED WITH WATER. The pump
must not be run unless it is completely filled with water, as there is "
danger of injuring some of the parts of the pump which depend
upon water for their lubrication. Wearing rings will not seize when
the pump is filled with water but are very liable to do so when the “1‘
pump is run dry. The pump may be primed by any of the following
methods, as may be best suited to the conditions.
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SL—Zj-fil; l Fig. 3—Installation of Ejector for Priming Pump.
PRIMING BY EJEGTOR 0R EXHAUSTER 4
When steam, high pressure water, or compressed air is available,

, the pump may be primed by attaching an ejector to the highest ,
' points in the pump casing as shown in figure 3. This will remove ‘
the air from the pump and suction line provided a tight valve is
installed in the discharge line close to the pump. As soon as the
ejector waste pipe throws water continuously, the pump may be
started. After starting, a steady stream of water from the waste

; pipe indicates that the pump is primed. If this stream of water is
not obtained, the pump must be stopped at once and the process
of priming repeated. A foot valve is unnecessary when this kind of

i device is used.

_ 8 _

 GLOBE VALVE To BE
CLOSED AFTER PRIMING
t'_——-_—A I! 7
.!.X 7
c. !71
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97-7 7
LET "‘ +
7 VACUUM a M A 1:: 7
‘71. : m !‘—|!_ M?,®3=,, A 7 .
_ 7 7 _.|7|,,._'.' Ii” E I I ”l I
7 u- ' El __ "
;—__-__-_-_ FLOOR LINE '_—_ ‘ 7
WATER SEAL To | 7
VACUUM PUMP FROM
Fm Egg; 5 7
’57:? i 7
'f:,—:%:rr’r§I ’
Fig. 4ePriming Pump Arrangement When Priming Centrifugal Pump ,
With Wet Vacuum Pump. 7
7
PRIMING BY FOOT VALVE ONLY
When it is not practicable to prime by ejector or exhauster, the .
pump may be primed by the use of a foot valve. The foot valve 7
will prevent water running out through the suction inlet and the ’
pump can be completely filled with water from some outside source. 7
Pet cocks on top of the pump should be opened during filling to
allow the air to escape. A tight foot valve will keep the pump con— 7
stantly primed, and, so it may be used for automatic pump opera- '
tion. It must be inspected frequently, however, to see that it does 7
not develop leaks and thus allow the pump to be started dry.
PRIMING BY VACUUM PUMPS j
When neither of the above methods of priming are practicable, the 7
pump may be primed by the use of a vacuum pump to exhaust the ,
air from the pump casing and suction line as shown in figure 4. 7
A wet vacuum pump is preferable, as it will not be injured if water 7
* enters it. 7'
When a dry vacuum pump is to be used, the installation must be i
, such as to prevent water being taken into the air pump. This may 7
be done by having the pipe leading from the pump to the air pump '7
installed with a vertical rise of over 35 feet. 7
Piping is arranged as shown in figure 5 when the centrifugal ‘
pump or pumps are to be primed by a dry vacuum pump. 7
7
Pipes A and C should be about % inch in diameter and pipe B 7
should be about 1% inches in diameter. 7
Pipe D should be a piece of six or eight inch pipe about 3 feet 7
long with threads on both ends. A standard six or eight inch pipe 7
_ 9 _
7 7
L 7
7

 cap should be placed over each end with a hole tapped in one for
pipe B and a hole tapped in the other for pipe C. Pipe A should be
tapped into the side of pipe D at about one-third of the distance
from the top of the pipe.
In order to tell when the pump or pumps are primed it is very
satisfactory to place a water gauge glass F on pipe B located slightly i
.w
flu—nl‘ , i a
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Dav 5" :5: ..
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— L—‘fl
PUMP — a") . PUMP . __., ii
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4" t'lfi‘lm'la
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if; E iii
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Fig. 5#Priming Pipe Arrangement When Priming Centrifugal Pump
With Dry Vacuum Pump.
above the pump. When the water rises in this glass the pump is
primed and the valve between the pump and vacuum line can be
closed.
The sketch shows only one pump. If it is desired to connect
the priming system up to prime several pumps, the only addition
is that a pipe leading from pipe A to the other pumps should be
connected at the proper places to enable any one pump to be primed “
or all of them to be primed at once.
When pipe B cannot be run into the suction well it can be con- i
nected to the suction pipe as shown by pipe E. '
CAREFUL ATTENTION TO THE METHOD OF PRIMING
WHEN THE PUMP IS INSTALLED MAY SAVE ANNOY-
ANCE LATER DUE TO IMPROPER PRIMING EQUIPMENT.
STARTING
THE PUMP MUST NOT BE STARTED WITHOUT BEING
PRIMED. Be sure that the driver rotates in the direction indicated
by the arrow, on the pump casing.
— 10 — ’
. i

 A centrifugal pump primed and operating at full speed with the
discharge gate valve closed usually requires much less power than
when it is operating at its rated capacity and head with the dis- 1
charge gate valve open. For this reason WE RECOMMEND i
THAT THE GATE VALVE ALWAYS BE CLOSED WHEN THE ‘
. PUMP IS BEING STARTED. With small sizes of squirrel cage 1;
A“ induction motors, it sometimes is permissible to start with the gate
' ' valve open, but with larger sizes of squirrel cage motors and with ; I
synchronous motors, the gate valve must be closed when starting. l‘
The excessive current required by the motor to start up under full i
load will in time cause trouble with the motor. The operator should 1
follow this suggestion, as the manufacturers will not assure continu— I
ous motor operation unless this procedure is followed. If the pump E
must be started with the discharge valve open, a wound rotor induc- '
. tion motor should be used as this will develop full load torque when
starting without requiring excessive current. In any case longer i
motor life will be obtained by starting up the pump with the dis- !
charge valve closed. THIS DOES NOT APPLY TO AXIAL ]
FLOW PUMPS WHICH MUST ALWAYS BE STARTED 1
WITH DISCHARGE VALVE OPEN TO PREVENT SEVERE ,
OVERLOAD ON DRIVER. i
CHARACTER OF WATER .
All guarantees of performance are based on pumping clear, fresh 3
water, the temperature not exceeding 85°F. unless expressly stated. 3
If, after the pump is installed, there is reason to suspect that the 5
water has a deteriorating effect on the metals of which the pump is
made, it is advisable to inspect the pump frequently so that renewal ..
can be made in sufficient time. Particular attention should be given ,
to pumps handling sea water or acidulous water. The Company
does not guarantee the metals to withstand any corrosive action of g
the water. It does, however, advise the use of special metals where ,
such corrosive action may occur, and when ordered such corrosion l
- resisting metals are furnished which experience has proved best i
"5 adapted to the purpose. 1
STUFFING BOXES AND PACKING—FIG 6 1
‘ The stuffing boxes are ordinarily packed before shipment. If, how- i
ever, stuffing boxes are not packed, they should be carefully cleaned ;
and the packing placed in them. Be sure that sufficient packing is I
placed back of the water seal ring so that the water for sealing is ,
brought in at the water seal ring and not at the packing. The piping
supplying the sealing water should be fitted tightly so that no air is
brought in, as a small quantity of air entering the suction at this 1
point may result in the pump losing its suction. IF THE WATER 2
TO BE PUMPED IS ACID, DIRTY OR GRITTY, SEALING l
‘ —- 11 —
:. l
't

 WATER SHOULD BE PIPED TO THE STUFF ING BOXES
FROM SOME CLEAN OUTSIDE SOURCE OF SUPPLY in
order to prevent damage to the packing and shaft sleeves. In plac—
ing the packing, each packing ring should be cut to the proper -!~
length so that the ends come together but do not overlap. The suc-
ceeding rings of packing should be placed in the stuffing box so that
the joints of the several rings of packing are staggered. The packing {is
should not be pressed up too tight, as this may result in burning the
packing and cutting the shaft. The stuffing box is not properly
packed if friction in stuffing boxes prevent turning the rotor by
hand. On starting the pump it is well to have the packing slightly
loose without causing an air leak. Rather than put too much
pressure on the gland, if it seems to leak, put some heavy oil in
the stuffing box until the pump works properly and then gradually
tighten up the gland. The packing should be changed occasionally.
When handling paper stock, sealing water should be piped to the
stuffing boxes from some clean outside source with sufficient pressure
to keep the stock from entering the stuffing box. This will increase
the life of the stuffing box parts and will also eliminate the loss
of stock through the gland.
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E Fig. 6*Arrangement of Standard Stuffing Box ”’
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— 12 — '
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‘1
SINCE PACKING BOXES ARE WATER SEALED, BE SURE
THAT THE WATER SEAL VALVES ARE SUFFICIENTLY ii
OPEN T O ALLOW A SLIGHT LEAKAGE OF WATER, but i
u: not open so much that the gland has to be drawn tight to prevent i
excessive leakage. This leakage should be piped away to the sump }
or sewer. }
I!“ All pumps for general service are shipped packed with the highest
grade of soft, square asbestos packing, impregnated with oil and l I
graphite. Packings in which the individual strands are lubricated be- i
fore braiding are to be preferred. This type of packing is success- i
fully used on all usual pump applications, including pumps for E
boiler feed service handling water up to 212°F and pumps used for ‘
circulating cold brine. 3
When selecting packing special care should be exercised to secure i
a soft, well lubricated packing to reduce stuffing box resistance to j
the minimum and prevent excessive wear on the shaft sleeves. i
There are a number of brands of packing on the market which have i
the desired characteristics. Those listed below should be regarded l,
as typical rather than specific recommendations: I
No.317............................AnchorPackingCompany '
Centripak Style C-7. . . . . . . . . . . . . . . . . .Johns-Manville Company
Garlock No. 234.. . . . . . . . . . . . . . . . . . . .Garlock Packing Company
Monarch Style No. 454. . . . . . . . . . . . .Monarch Packing Company E
No.193...............................U.S.RubberCompany
Metallic packing is furnished with many pumps designed for »
high temperature boiler feed service. The following are samples of
satisfactory metallic packings: «
Fel ProNo.39SA. . . ...................FeltProductstg. Co. '
John Crane Style 101EO or 111. . . . . . . . .Crane Packing Company .’
Durametallic Grade B—110. . . . . . . . . . . . .Durametallic Corporation
Metallic packing should not ordinarily be used on pumps equipped :-
with bronze shaft sleeves. :
, PUMPS FOR GONDENSATE SERVICE 5
4 Pumps used for condensate service such as the type SN, CS, C2, etc.,
i have the casing constructed with a large suction chamber with a 4‘]
I vent connection of liberal size. This should be piped with a con- .
‘, tinuous rise, without pockets or traps, to a point on the condenser i
‘ well above the highest water line and preferably to the point of i
lowest absolute pressure.
As the submergence of a condensate pump greatly affects the ‘
capacity of the pump at a given speed it is necessary to see that the 1
recommended minimum submergence is never exceeded.
Where water is piped to the glands, the water used for sealing the i
stuffing box is usually taken from the pump discharge where only a l
—- 13 — ;
‘e l
A 1

 single pump is installed. Where two or more condensate pumps are
connected to the same condenser, the scaling water connections are
taken from the combined condensate pump discharge pipe. This is
so that the glands of the idle pump, as well as the running pump, sh.
will be sealed.
It is recommended that the water level in the hotwell be regulated
by throttling the discharge of the condensate pump rather than by ‘1“
by-passing condensate back to the hotwell. This eliminates tendency .
for the pump to operate at capacities beyond its recommended
rating. '
BEARINGS ANII “IRRIGATION
GREASE LUBRICATED BALL AND ROLLER BEARINGS
Pumps equipped with grease lubricated ball or roller bearings have
the bearings packed with grease in the factory and ordinarily require
no attention before starting providing the pump has been stored in
a clean dry place prior to its first operation. After the pump has
been started the bearings should be watched the first hour or so ‘
to see that they are operating properly.
The importance of proper lubrication of ball bearings can not be
' over emphasized. It is difficult to say how often a ball bearing
should be greased since this depends on the conditions of operation.
It is well to add two or three ounces of grease at regular intervals
but it is very important to avoid adding too much grease. Excess
grease will leak out of the end of the bearing and is the most com-
. mon cause of overheating of ball bearings. For average operating
conditions it is recommended that grease be added at intervals of
three to six months. '
3 Great care must be exercised to keep the housing perfectly clean
and only clean grease should be used. Foreign solids or liquids in-
vading the bearing housing completely destroy the bearings in a
short time. When cleaning ball bearings flush with gasoline or
kerosene and use clean tools and cloths. Do not use waste. -
' For grease lubrication a regular ball bearing grease should be .
. used or a standard commercial vasoline can be substituted. Do '
' not use graphite. A No. 1 or 2 grease is generally satisfactory for ,7
operation at ordinary temperatures, the lighter grease being used ‘
. for operation at high speed or at low room temperatures.
Mineral greases are recommended with a soda soap base. Greases ‘
1 made from animal or vegetable oils are not recommended due to i
‘5 the danger of deterioration or forming of acid.
é Most of the leading oil companies have special ball bearing greases ‘
; which are satisfactory. :
l For specific recommendations consult our engineering department. E
— 14 — l

 l

l

l

OIL LUBRIGATED SLEEVE BEARINGS—FIG.7

Before starting the pump clean the bearings thoroughly as dirt :1

‘ and foreign substance may get in during shipment or erection. }

M The bearings should then be filled with a medium neutral mineral

base oil of about 250 to 300 Seconds Saybolt viscosity at 100°F. An i

., oil of SAE No. 20 grade is quite satisfactory. This oil should be i
" changed when it becomes dirty and the bearings cleaned out at the l .

same time. The bearings should be examined for wear at frequent l

intervals. When the pump is first started the operator should i

make sure that the oil rings are turning freely. They may be :

watched through the oil holes in the bearing caps. During the first 3

hour of operation they should be watched to see that they are i

operating properly.

OIL LUBRIGATED BALL BEARINGS ‘3

Instructions covering oil lubricated sleeve bearings also apply to 1

oil lubricated ball bearings and the grade of oil should be the same. ,

For cross section view of oil lubricated ball bearings refer to page 3

35 and page 37. i

MAINTENANCE AND REPAIR l

1

TO REMOVE AND REPLACE BEARINGS l

BABBITT BEARINGS —Figure 7: No adjustment is provided in l

babbitt bearings. These may be replaced when worn.

Remove nuts and pins holding bearing cap. Remove bearing i

cap. Remove upper half bearing shell. Rotate lower half bearing a

shell around until it is on top. Remove it from under oil rings.

When two adjustable set collars are provided to take the thrust a

' clearance of about 1 / 64 of an inch should be allowed between the '-

collar and the bearing.

| I i

- V l

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‘ EW’4 1

i Fig“ 7—Sleeve Bearing Assembly With Collar Thrust Bearing.

l — 15 — ‘

I l

g l

 single pump is installed. Where two or more condensate pumps are
connected to the same condenser, the sealing water connections are
taken from the combined condensate pump discharge pipe. This is
so that the glands of the idle pump, as well as the running pump, a.
will be sealed.
It is recommended that the water level in the hotwell be regulated
by throttling the discharge of the condensate pump rather than by ‘45
by—passing condensate back to the hotwell. This eliminates tendency ‘
for the pump to operate at capacities beyond its recommended
rating. '
BEARINGS ANB LIIBRIGATION
GREASE LUBRIGATED BALL AND ROLLER BEARINGS
Pumps equipped with grease lubricated ball or roller bearings have
the bearings packed with grease in the factory and ordinarily require
no attention before starting providing the pump has been stored in
a clean dry place prior to its first operation. After the pump has
been started the bearings should be watched the first hour or so .
to see that they are operating properly.
The importance of proper lubrication of ball bearings can not be
over emphasized. It is difficult to say how often a ball bearing
should be greased since this depends on the conditions of operation.
It is well to add two or three ounces of grease at regular intervals
but it is very important to avoid adding too much grease. Excess
grease will leak out of the end of the bearing and is the most com-
mon cause of overheating of ball bearings. For average operating
conditions it is recommended that grease be added at intervals of
three to six months. '
Great care must be exercised to keep the housing perfectly clean
and only clean grease should be used. Foreign solids or liquids in-
vading the bearing housing completely destroy the bearings in a 1
short time. When cleaning ball bearings flush with gasoline or
kerosene and use clean tools and cloths. Do not use waste. .
For grease lubrication a regular ball bearing grease should be ,
used or a standard commercial vasoline can be substituted. Do
not use graphite. A No. 1 or 2 grease is generally satisfactory for i
operation at ordinary temperatures, the lighter grease being used
for operation at high speed or at low room temperatures. ‘
Mineral greases are recommended with a soda soap base. Greases ‘
made from animal or vegetable oils are not recommended due to i
the danger of deterioration or forming of acid. ‘
Most of the leading oil companies have special ball bearing greases '
which are satisfactory.
For specific recommendations consult our engineering department. 1
-— 14 - i
l

 OIL LUBRIG