pump installation - mi-wea.org≡1” to 2” thick ≡some baseplates are fabricated and entire...
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12/1/2017 PUMP INSTALLATION PRESENTATION 1
PUMP INSTALLATION
Tim Sullivan, P.E.
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PRESENTATION AGENDA
≡ Prior to installation
≡ Pipe, Fittings, and Valves
≡ Nozzle Strain, Couplings and Offsets
≡ Seals, Packing and Gauges
≡ Pump Pedestal, Anchors and Grout
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Questions? Fire Away
Pump Orientation
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PRIOR TO INSTALLATION:
≡Get customized (annotated) O&M
manuals
≡Off loading
≡Maintenance (storage and prior
to installation
≡Installation
≡Maintain (rotate shaft) while in
storage
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Suction Pipe
≡Important hydraulically (for centrifugal pumps)
≡Straight runs – 4-6 diameters
≡Example: 6” pipe 2 ft. to 3 ft. straight run min.
≡Reducer
≡Eccentric
≡Connect to the pump
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Discharge Pipe
≡ Not as important hydraulically (Get it out of the way)
≡ Vertical – use Base elbows (watch out for check valves)
≡ Horizontal – go back to suction header
≡ Reducer
≡ Conncet to pump
≡ Concentric reducer
≡ Provide air vents stop cocks
≡ Consider 45 Degree Fittings, Wyes and Laterals
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Couplings
Use to help disassemble pipe – pump
Install btw isolation valve and pump
Dresser, Victaulic (grooved) Disassembly style coupling
Thrust restrained on discharge (always, sometimes on suction
Generally best to use on suction side
Not suitable for offsets
Use mitered fitting
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Couplings
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Nozzle Strain, Pipe Alignment, Couplings and
Offsets
≡ Nozzle strain
≡ Couplings (Dresser style)
≡ Excellent to align in X axis
≡ Only 4 degrees in off-set direction
≡ Mechanical vs flanged fittings – Rotate
≡ Flex Connectors
≡ Bevel and filler flanges
≡ Fabricated off-set pipe (best for significant off-sets)
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Isolation Valves
≡Generally both suction and discharge
sides of pumps
≡Suction: Install upstream of straight
diameters
≡Discharge: Install downstream of check
valve
≡Type – very dependent on the service
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Check Valves
≡Always on the pump discharge
≡Install check valve after reducer
≡Be careful of check valves in the vertical
≡Foot Valves – generally not a good idea
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Reducers – Connect at the Pump
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Energy Considerations
≡ Laterals, Wyes, 45’s and Long Radius 90’s’
≡ Watch out for checks valves – WIDE variety of Headloss
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≡ Laterals and 45’s vs 90’
≡ Watch checks valves
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Eccentric on Suction Side
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Mag meters
≡ 3 to1 straight pipe diameters, suction to discharge minimum
≡ Ideal 10 to 3 pipe diameters
≡ Example 6” pipe:
≡ 3 x 6 “ = 18” straight pipe suction (min.)
≡ 1 x 6” = 6” strainght discharge pipe (min.)
≡ 60” and 18” ideal
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SEALS AND PACKING
≡Mechanical seals – MANY styles and materials, consult mfr.
≡Generally silicone-carbide seals work for WW applications, carbon-
ceramic for W applications
≡ Single seal fine with flush-water, double if not available
≡Consider split seals for large diameter shafts
≡ Seal water pressure greater than stuffing box pressure
≡ Packing rings – make sure gland is centered at flushing port
≡Adjust periodically, but don’t overtighten
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GAUGES AND INSTRUMENTS
≡Gauges
Required start-up, and to assess pump performance / trouble
shoot
Gauge not necessarily required, just fittings
Compound gauges required on suction lift pumps
≡Consider vibration monitoring, amp draw, temperature monitors,
preferable on critical assets and larger ($$$) pumps
≡Get baseline data and compare over time
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Seal Water System
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Pipe Installation Directions
≡ To the pump from both sides – not good
≡ To the pump, then away from the pump - best
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Nozzle Strain, Pipe Alignment, Couplings and
Offsets
≡ Nozzle strain
≡ Couplings (Dresser style)
≡ Excellent to align in X axis
≡ Only 4 degrees in off-set direction
≡ Mechanical vs flanged fittings – Rotate
≡ Flex Connectors
≡ Bevel and filler flanges
≡ Fabricated off-set pipe (best for significant off-sets)
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PUMP BASEPLATE, PEDESTAL,
ANCHORS, AND GROUT
≡System, act in unison
≡Pedestal: anchors pump mass to structural base slab
≡Gap required to adjust and align pump baseplate
≡Grout: fill void between pump baseplate and pedestal
≡Baseplate designed to HI Standard 1.3.8
≡Anchors tie the baseplate, grout and pedestal together
in unison
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Concrete Pedestal
≡ Size 3 – 5 times pump – motor mass
≡ Set 6” + away from pump baseplate edge (all sides)
≡ Bush hammer floor slab
≡ Install Reinforcing steel into floor slab
≡ Apply bonding agent
≡ Pump anchors system:
≡ Locate with template
≡ Secured in pedestal or embedded into floor slab
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Anchor System
≡ Sized by Mfr. (or Engineer) but Owner/Contractor can purchase
≡ J-bolt (new) epoxy anchors (existing)
≡ Anchor, nut, plate, and sleeve
≡ Protect sleeve void (foam insulation) and threads (grease, putty, tape, etc.)
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Pump Base Alignment
≡ Wedges / Shims vs jacking screws
≡ DON’T use double nuts
≡ Front to back first (X), then side to side (Y)
≡ Always remove shims
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Grout Course
≡ Use non-shrink grout or flowable epoxy under baseplate
≡ 1” to 2” thick
≡ Some baseplates are fabricated and entire void needs to be filled (i.e.
chopper pump)
≡ Require air vent
≡ Consult with manufacturer. Grout must harden (~25+ hours) prior to
torqueing
≡ Remove shims / wedges prior to torqueing
≡ Grout must cure (72+ hours) prior to testing
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Check pump/motor alignment (angular alignment)
Eyesight – straight edge & feeler gauges
Mechanical
Displacement -
dial indicators
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Check pump/motor alignment (parallel alignment)Laser Optic
Systems
Eyesight – straight edge & feeler gauges
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Away from
Electrical Panel
Rubber SS
Electrical
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Thank you!Tim Sullivan, [email protected]
248.454.6349
Any
Questions?
(I may have an
answer)