POSITION 00 90° 100° 270° TOTALS
• Right au,d Left are determi ned when viewing the driver hub from the pump.
PART 2 OFFSET ALIGNMENT CHECK
TOTAL INDICATOR READINGS
VIEW OF DRIVER HALF COUPLING HUB VIEWED" FROM PUK?
Vertical Offset" = Bottom - Top = " = = Misalignment 2
Horizontal Offset = ' Right - Left = = = Misalignment • 2
RULES TO APPLY TO THE RESULTS BELOW:
With Indicator Mounted On The Driver Neg = Driver Coupling Is High & Left Pos = Driver Coupling Is Low & Right
Driver Coupling Is (Circle Correct High Or Low And Right Or Left
One):
2-1 2
ALIGNMENT DATA SHEET
HORIZONTAL PUMPS SHEET 2 OF 2
TOP VIEW ( H O R I Z O N T A L M O V E )
VERTICAL ANGULAR MOVE CALCULATION MOVE DRIVER TO CORRECT ALIGNMENT
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HORIZONTAL ANGULAR MOVE CALCULATION . HOVE DRIVER TO CORRECT ALIGNMENT
GH x LI Driver Inboard Pedestal Shift =
Driver Outboard Pedestal Shift =
INBOARD DRIVE
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3<£T E X A M P L E
PIPING
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SUCTION AND DISCHARGE PIPING
These units are furnished for a particular service condition. Changes in the hydraulic system may affect performance adversely. This is especially true if the changes reduce the pressure at the suction or if the liquid temperature is increased. In case of doubt contact the nearest Ingersoll-Rand Office.
Suction and dischrge piping should be of ample size, be installed in direct runs, and have a minimum of bends,
NOTE
PROVISION. MUST BE MADE TO SUPPORT PIPING EXTERNAL TO THE PUMP TO- PREVENT EXCESSIVE NOZZLE LOADS AND MAINTAIN PUMP-DRIVER ALIGNMENT.
Install a check valve and a gate valve in the discharge pipe on the pump.
When the pump is stopped, the check valve will protect the pump against excessive pressure and will prevent the pump from running backward. The check valve should be installed between the gate valve and the pump nozzle in order.to permit its inspection. The gate valve is also useful in priming and starting the pump.
Keep the suction pipe short and direct. Use a suction pipe at least one size larger than the pump suction nozzle. Keep the suction pipe free of all air pockets.
IMPORTANT
A SPOOL PIECE S H O U L D BE I N S T A L L E D IN SUCTION L I N E ' S O T H A T THE S U C T I O N SCREEN MAY BE INSTALLED AND REMOVED.
BY PASS LINE
W A R N I N G
OPERATION AT LOW FLOWS RESULTS IN PUMP HORSEPOWER HEATING THE LIQUID. A BY PASS MAY BE REQUIRED TO PREVENT VAPORIZATION AND SUBSEQUENT PUMP DAMAGE.
REFER TO LOCAL INGERSOLL-RAND BRANCH TO DETERMINE IF A BY PASS IS REQUIRED.
MECHANICAL DAMAGE MAY RESULT FROM CONTINUOUS OPERATION AT FLOWS LESS THAN 25 PERCENT OF THE DESIGN OPERATING POINT OF THE PUMP. Refer to General Ar-rangement Drawing Notes and nameplate rating.
MINIMUM FLOW
W A R N I N G
OPERATION AT LOW FLOWS RESULTS IN PUMP HORSEPOWER HEATING THE LIQUID. A BY-PASS LINE IS REQUIRED TO PREVENT VAPORIZATION AND SUBSEQUENT PUMP DAMAGE.
MECHANICAL DAMAGE MAY RESULT FROM CONTINUOUS OPERATION AT FLOWS LESS THAN 210 GPM.
Customer to install a yarway "ARC" valve (Automatic Recirculation Control), furnished by Ingersoll-Rand Company per drawing 62061460 in discharge line between pump discharge and first valve.
Customer to provide a 1.50" by-pass line from y a r w a ynA R C " valve to source of suction. A paddle orifice, furnished by Ingersoll-Rand Company per drawing no. X-150D438JX3,.is to be installed in by-pass line as close to source of suction as possible to prevent vaporization in line.
WARM-UP LINE NOTE
Customer to install 1.00 muffled type orifice furnished by Ingersoll-Rand Company per drawing Y-3HMTA438AX1 in line, by-passing main discharge valve.
Direction of flow is from discharge to suction at 20 GPM, STUFFING BOX
Customer to inject 1/2 GPM cooling water at 10 PSI above suction pressure for each box,
LUBE OIL COOLER
Customer to inject 3,5 GPM of cooling water at 85.Degrees F. and 150 PSI maximum to lube oil cooler inlet.
SUCTION SCREEN i In a new installation,- great care should be taken to prevent dirt, scale and
welding beads from entering the' pump, as it is particularly important to protect the numerous close running fits from abrasive matter present in new piping.
The suction system should be t h o r o u g h l y f l u s h e d before i n s t a l l i n g the suction strainer and making .up suction piping to the pump.
The suction strainer should be installed as close to the pump suction as possible.
THE OPEN AREA OF THE STRAINER SHOULD HAVE A MINIMUM OF A 3 TO 1 RATIO TO THE AREA OF THE PUMP SUCTION.
The Ingersoll-Rand standard for suction strainers consists of a conical shaped steel plate. The plate has 1/16" perforations and is of sufficient size and thickness for the required flow.
Other type strainers may be used as long as they conform to the requirements stated above.
Pressure gauges should be installed on both sides of the screen so that the pressure drop across the screen can be measured.
When the unit is being started, the gages on each side of the screen should be carefully watched. An increase in the differential pressure between the two gauges indicates that the screen is becoming clogged with dirt and scale. At this point, the pump should be shut down, and the screen cleaned and replaced. When the scale and dirt have been removed from the system as indicated by no further pressure from across ther screen, it may be removed.
The screen should be used until all foreign material is removed from the system.
COUPLING ALIGNMENT CHECK
Refer to the section entitled "SHAFT/COUPLING ALIGNMENT" and perform a coupling alignment check as outlined. This check is recommended to insure the alignment has not been disturbed during the grouting of the bedplate or while installing suction and discharge piping.
SECTION 3 OPERATION
39
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TECHNICAL DATA
These pumps are furnished for a particular service condition. Changes in the hydraulic system may affect the pump's performance adversely. This is especially true if the changes reduce the pressure at the suction flange or if the liquid t e m p e r a t u r e is i n c r e a s e d . In case of d o u b t , contact the nearest Ingersoll-Rand Office,
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 g r a v i t y of the liquid p u m p e d . However, since the developed pressure is PSIG (pounds per square inch) and the brake horsepower to drive the pump are a function of the specific gravity of the liquid, both will be affected in direct proportion by any change in specific gravity. Therefore, a change in -specific gravity will affect the discharge gage pressure. Any c h a n g e s should be n o t e d , in that they may o v e r l o a d the purap'3 d r i v e r . EFFECTS OF VISCOSITY
The pump is designed to deliver rated capacity at rated head for a liquid with a particular viscosity.
When contemplating operation at some viscosity other than for which the pump w a s o r i g i n a l l y d e s i g n e d , the changed c o n d i t i o n s should be r e f e r r e d to Ingersoll-Rand Company for our recommendations,
CHANGING PUMP SPEED
Changing the speed of a centrifugal pump changes the capacity, total head and brake h o r s e p o w e r . The capacity will vary in a direct ratio with the s p e e d , w h e r e a s the total head will vary as the ratio of the speed squared.
The brake h o r s e p o w e r will vary as the ratio of the speed cubed .except in c a s e s where the speed change also r e d u c e s the efficiency of the p u m p . NET POSITIVE SUCTION HEAD (NPSH)
Any l i q u i d , hot or c o l d , m u s t be pushed into the impeller of the pump by some absolute p r e s s u r e , such as the atmosphere or the vessel pressure from which the pimp takes its' suction,
The head in feet of liquid necessary to push the required flow into the pump is called the Net Positive Suction Head. This value, more commonly called N P S H , is measured above the vapor pressure of the liquid at the pumping temperature.
There are two kinds of NPSH: the NPSH required by the pump, as shown on the pump curve, is the head needed to cover the losses in the pump suction;
the second NPSH is that available in the system taking into account friction l o s s in auction p i p i n g , v a l v e s , f i t t i n g s , e t c . In all c a s e s the NPSH A v a i l a b l e , measured above vapor pressure, must exceed the NPSH Required in order to push the liquid into the pump,
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OPERATING PRECAUTIONS
W A I N I N G
DO NOT WIPE DOWN IN THE V I C I N I T Y OF ROTATING PARTS, IF UNUSUAL NOISE OR VIBRATIO.NS OCCUR, SECURE THE PUMP AS SOON AS POSSIBLE.
W A R N I N G
THE UNIT MUST NOT BE O P E R A T E D U N L E S S COUPLING GUARD IS BOLTED IN PLACE.
F A I L U R E TO OBSERVE THIS WARNING COULD RESULT IN INJURY TO OPERATING PERSON-NAL.
1. Never operate the pump with suction valve closed.
2. Never operate pump u n l e s s it is c o m p l e t e l y filled w i t h liquid and vented.
3. Never operate the pump unless a liquid source is availble.
PRE OPERATIONAL CHECKS
The following s t e p s should be followed at initial start-up and after the equipment has been overhauled:
1. Ensure pump and piping is clean. Before putting the pump into opera-tion,- it should be thoroughly flushed out to remove the rust preventive as w e l l as any foreign matter which may have accumulated during installation.
Take all possible care not to contaminate your system,
2. Clean and flush l u b r i c a t i o n s y s t e m . Fill reservoir with oil to the
A. If pump is equipped with a mechanical seal, ensure it is properly assem-bled and tightened (refer to "STUFFING BOX" section).
CAUTION
HOST CARTRIDGE SEALS ARE EQUIPPED WITH A SPACER BETWEEN THE GLAND PLATE AND DRIVE COLLAR. THIS SPACER MUST BE REMOVED BEFORE STARTING UNIT.
B. If pump is equipped with a packed b o x , insure box is properly packed (refer to "STUFFING BOX" section).
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6. Ensure coupling is properly aligned and lubricated, and pump and driver is properly dowelled (refer to " S H A F T / C O U P L I N G ALIGNMENT" p r o c e c u r e ) . 7. Ensure coupling guard is in place.
8. Check torque of all bolting and plugs for tightness.
INITIAL START UP PROCEDURE
1. Close discharge valve if valve is not already closed.
2. Prepare the driver for start up in accordance with the manufacturer's instructions,
3. Warm-Up Pump
Avoid severe thermal shocks to the pump as a result of sudden liquid temper-ature c h a n g e s , The pump m u s t be p r e h e a t e d prior to s t a r t - u p . Unless otherwise specified the external temperature of the casing must be within
100 Degrees F. of the temperature of the liquid to be pumped at time of start-up. Due to the heavy metal sections, the casing will lag the liquid temperature during such changes, and severe temperature stresses and subse-quent misalignment of machined fits may result. Pre-heating is accomplished by circulating a small amount of hot, fluid through the casing by utilizing vents, drains or by pass from discharge. Preheat pump slowly at a rate not to exceed 100 Degrees F. per hour.
Prime pump and ensure pump suction valve is open.
C A U T I O N
I
BEFORE STARTING OR WHILE OPERATING THE PUMP, THE CASING AND SUCTION LINE MUST BE COMLETELY FILLED WITH THE LIQUID BEING PUMPED. THE ROTATING PARTS DEPEND ON THIS 'LIQUID FOR LUBRICATION AND THE PUMP MAY SEIZE IF OPERATED WITHOUT LIQUID.
5. Ensure pump recirculating line (if required) is open, clear and free of obstructions.
6. Check that pump is vented by observing leakage from casing vent and seal piping vent. Close vent when liquid is emitted,
7A. If pump is equipped with a mechanical seal, make sure seal piping is turned on.
7B. If pump is equipped with a packed box; turn on cooling water to lube oil cooler (when s u p p l i e d ) , stuffing box j a c k e t and s m o t h e r i n g g l a n d . 8. Start auxiliary oil pump.
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9. Check pump rotation by starting unit momentarily. The direction of rotation is clockwise when facing pump shaft from coupling e n d . Note the pump coasts to a gradual stop.
IF PUMP STOPS A B R U P T L Y WHEN DRIVER IS SHUT D O W N , I N V E S T I G A T E FOR PUMP BINDING. TAKE NECESSARY REMEDIAL ACTION BEFORE RESUMING OPERATION,
10A. Starting the driver (motor driven)
Prepare the d r i v e r for start up in accordance with the m a n u f a c t u r e r ' s instructions.
Start the driver.
10B, Starting the driver (turbine driven)
Prepare the turbine for start up in accordance with the manufacturer´s instructions.
Start the turbine and bring it up to speed quickly.
11. As soon as pump is up to rated speed, slowly open discharge valve.
This will avoid a b r u p t c h a n g e s in velocity and p r e v e n t s u r g i n g in the suction line.
12. Check to see that a u x i l i a r y oil pump has shut d o w n . Perform the operating checks.
IN THE INTEREST OF OPERATOR SAFETY THE UNIT MUST NOT BE OPERATED ABOVE THE NAMEPLATE CONDITIONS. SUCH OPERATION COULD RESULT IN UNIT FAILURE CAUSING INJURY TO OPERATING PERSONNEL. CONSULT INSTRUCTION BOOK FOR PROPER OPERA-TION AND MAINTENANCE OF THE PUMP AND ITS SUPPORTING COMPONENTS.
OPERATION AT LOW FLOWS RESULTS IN PUMP HORSEPOWER HEATING THE LIQUID. A BY-PASS MAY BE REQUIRED TO PREVENT VAPORIZATION AND SUBSEQUENT PUMP DAMAGE.
REFER TO LOCAL INGERSOLL-RAND BRANCH TO DETERMINE IF A BY-PASS IS REQUIRED.
MECHANICAL DAMAGE MAY RESULT FROM CONTINUOUS OPERATION AT FLOWS LESS THAN 25 PERCENT OF THE DESIGN OPERATING POINT OF THE PUMP - REFER TO THE NAMEPLATE RATING.
Immediately after start up, and frequently during running check the follow-ing:
1, Check suction and discharge pressure gauges.
C A U T I O N
OPERATING CHECKS
. W A R N I N G
2. Check pressure gages on each side of suction strainer.
3. Check for excessive leakage at stuffing box gland area,
A. If pump is equipped with a mechanical seal, there should be no visable leakage to the naked eye.
B. If p u m p is equipped with stuffing box packing, leakage should be 1 - 2 ounces per m i n u t e .
4. Check for unusual noises.
5. Check oil pressure at bearing inlets and sight flow indicators.
6. Check for adequate flow of cooling liquids,
7. After unit has been operated a sufficient length of time to reach normal o p e r a t i n g temperature, and conditon, the unit is to be shut down and a "HOT"
c o u p l i n g a l i g n m e n t check must be made (refer to "SHAFT/COUPLING ALIGNMENT"
procedure).
W A R N I N G
O P E R A T I O N OF THE UNIT WITHOUT PROPER LUBRICATION CAN RESULT IN OVERHEATING OF THE B E A R I N G S , BEARING FAILURES, PUMP SEIZURES AND ACTUAL BREAKUP OF THE EQUIPMENT EXPOSING OPERATING PERSONNEL TO PERSONAL INJURY.