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A4d.1/A5d.1 4/06 PACO Supercedes 9/05 PUMPS OLN, LN & OL

9/051 PPPPPACOACOACOACOACO PUMPSOLN, LN & OLInstallation, Operating,Maintenance InstructionsandParts ListTYPE OLNTWO STAGETYPE LNSINGLE STAGETYPE OLTWO 9/052 PPPPPACOACOACOACOACO PUMPSTABLE OF .. (Inlet) Piping .. (Outlet) Piping .. Wiring .. Disc .. Lubrication .. 6IV. DISASSEMBLY AND Type LN Type OLN, Unitype or Frame Assembly for LoNPSH LN Unitype with Fractional Frame LN, Unitype with Integral Frame OLN .. 8VI. TROUBLE-SHOOTING 9/053 PPPPPACOACOACOACOACO these instructions thoroughly before install-ing and operating your PACO IN-Line Type VLCentrifugal Pump.

A4d.1/A5d.1 4/06 Supercedes 9/05 6 PACO PUMPS • If pump will operate with a positive suction head, prime by opening suction valve and allowing liquid

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Transcription of A4d.1/A5d.1 4/06 PACO Supercedes 9/05 PUMPS OLN, LN & OL

1 9/051 PPPPPACOACOACOACOACO PUMPSOLN, LN & OLInstallation, Operating,Maintenance InstructionsandParts ListTYPE OLNTWO STAGETYPE LNSINGLE STAGETYPE OLTWO 9/052 PPPPPACOACOACOACOACO PUMPSTABLE OF .. (Inlet) Piping .. (Outlet) Piping .. Wiring .. Disc .. Lubrication .. 6IV. DISASSEMBLY AND Type LN Type OLN, Unitype or Frame Assembly for LoNPSH LN Unitype with Fractional Frame LN, Unitype with Integral Frame OLN .. 8VI. TROUBLE-SHOOTING 9/053 PPPPPACOACOACOACOACO these instructions thoroughly before install-ing and operating your PACO IN-Line Type VLCentrifugal Pump.

2 Successful operation depends oncareful attention to the procedures described in Sections1, 2 of this manual. Keep this instruction manual handyfor future use. The enclosed parts lists will prove helpfulif replacement parts are PUMP IDENTIFICATION All PACO PUMPS are identified by Catalog andSerial Numbers. These numbers are stamped onthe pump nameplate ( a) affixed to each pumpvolute casing, and should be referred to in allcorrespondence with the RECEIVING Check pumping unit for shortage and damageimmediately upon arrival. Pump accessories whenrequired are packaged in a separate container andshipped with the unit.

3 If equipment is damaged in transit, promptlyreport this to the carrier s agent. Make com-plete notations on the freight bill to speed satisfac-tory adjustment by the carrier. Unload and handle the unit with a sling. Do not liftunit by lifting lugs on the pump case or TEMPORARY STORAGE If pump is not to be installed and operated soonafter arrival, store it in a clean, dry area ofmoderate ambient temperature. Rotate the shaft by hand periodically to coatbearing with lubricant and retard oxidation 1a Follow motor manufacturer s storage recommenda-tions where LOCATION Locate the pump as close to the suction supply aspossible.

4 Use the shortest and most direct suctionpiping practical. Refer to paragraph F. SUCTION(INLET) PIPING. Locate the pump below system level whereverpossible. This will facilitate priming, assure a steady liquid flow, and provide a positive suctionhead. Make sure sufficient NPSH (Net Positive SuctionHead) is provided at the suction end by consider-ing the pump s location in relation to the entiresystem. Available NPSH must always equal orexceed required NPSH specified on the pumpperformance curve. Always allow sufficient accessibility for mainte-nance and inspection.

5 Provide a clear space withample head room for use of a hoist strong enoughto lift the unit. Make sure a suitable power source is available forthe pump motor. Electrical characteristics shouldmatch those specified on the motor data plate,within the limits covered in Section 3D. Avoid pump exposure to sub-zero temperatures toprevent pump liquid from freezing. If freezingconditions exist during shutdown periods, seeSection 3E for specific PIPING-GENERAL Do not use pump as a support for piping! Usepipe hangers or other supports at proper intervalsto provide complete piping support near the suction and discharge piping should beindependently supported and properly aligned sothat no strain is transmitted to the pump whenflange bolts are tightened.

6 Make sure piping is as straight as possible, avoid-ing unnecessary bends and fittings. Where neces-sary use 45 or long-sweep 90 pipe fittings todecrease friction loss. Where flanged joints are used make sure thatinside diameters properly match. Do not spring or force piping when making #:37-10707-730001-1681 STOCK #:SER #: ##### BROOKSHIRE, TEXAS34014412 : 9/054 PPPPPACOACOACOACOACO PUMPSF. SUCTION (INLET) PIPINGThe sizing and installation of suction piping is particu-larly important. It must be selected and installed in amanner that minimizes pressure loss and permitssufficient liquid flow into the pump during starting andoperation.

7 Many NPSH problems can be traced directlyto improper design of suction piping systems. Observethe following precautions when installing suction piping: Suction piping should be as direct as possible, butnever shorter than ten times the pipe suction piping can be the same diameter asthe suction opening . Longer piping should be oneor two sizes larger (depending on length), reduc-ing to diameter of suction opening near the pump. At no point should suction piping be smaller indiameter than the pump suction opening . Horizontal suction line should follow an evengradient if possible.

8 A gradual upward slope to thepump is recommended for suction lift conditions,and a gradual downward slope for positive suctionhead. Use an eccentric reducer, with the eccentric sidedown when reducing pipe diameter to diameter ofsuction opening . Avoid any high points, such as pipe loops whichmay create air pockets and throttle the system orproduce erratic pumping. Install a gate valve in the suction line to isolate thepump during shutdown and maintenance, andfacilitate pump removal. Where two or more pumpsare connected to the same suction line, installduplicate gate valves to isolate each pump from theline.

9 Gate valves should always be installed in positionsthat avoid air pockets. Globe valves should not beused, particularly when NPSH is critical. Properly sized pressure gauges can be installed ingauge taps on pump suction and dischargenozzles. Gauges enable the operator to monitorpump performance and determine that pumpconforms to parameters of performance curve. Ifcavitation, vapor binding, or other unstable opera-tion occurs, pressure gauges will indicate widefluctuation in suction and discharge pressures. Gauge cocks are recommended for use with pres-sure gauges from constant wear and vibration whennot in DISCHARGE (OUTLET) PIPING Short discharge piping can be the same diameteras pump discharge opening .

10 Longer piping shouldbe one or two sizes larger depending on length. An even gradient is best for long horizontal runs ofdischarge piping. Install a gate valve near the discharge opening toprime and start pump. The discharge gate valve isalso used to isolate pump during shutdown andmaintenance, and facilitate pump removal. Any high points in discharge piping may entrapair or gas and thus retard pump operation. If check valves are used, or if other possibilitiesor liquid hammer exist, close the discharge gatevalve before pump MECHANICAL SEALSAll PACO Type OLN, LN, OL PUMPS come equippedwith mechanical seals and are matched to conditionsfor which the pump was sold.


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