536918 1 Paco Lc End Suction Pump Brochure User Manual
User Manual: Pump 536918 1 Paco Lc End Suction Pump Brochure
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PACO LF/LC/LCV
TYPE LF/LC/LCV
END SUCTION PUMPS
Close Coupled and Frame Mounted
END SUCTION PUMPS
Type LF (Frame Mounted)
Type LC (Close Coupled)
Type LCV (Vertically Mounted Close Coupled)
Grundfos CBS Inc. is fully committed to advanc-
ing pump technology and providing its customers
with the most efficient pumps in the market.
The PACO line of end suction, single stage pumps
serves as the industry standard in performance,
quality, and durability. With an expanded selec-
tion of 32 sizes available, the PACO line of pumps
are the smart choice for a number of reasons:
> Low life-cycle costs
> High efficiency for reduced operation costs
> Compensated double-volute design for reduced
radial loads, minimized shaft deflection, and
prolonged seal life and bearing life
> Mechanical design for reduced maintenance
and minimal downtime
> Back pull out design for ease of maintenance
and servicing
> Range of sizes to meet precise application
requirements
> Quiet operation
Advanced features incorporated as standard on
PACO end suction pumps ensure optimum perfor-
mance and reliability. These features, as well as
optional features that meet specialized needs, are
available on the broadest line of high-efficiency
pumps offered to the industry.
An innovative pump and impeller design produces a
higher operating efficiency – up to 91 percent – and
provides a wider band of best operating efficiency,
even during conditions of off-design operation.
Quite simply, the PACO line of pumps is the smart
choice for lower initial cost, longer pump life, re-
duced operating and maintenance costs, maximum
reliability, and quieter operation.
2 | Overview
LF/LC/LCV
Double Volute Design with
Superior Advantages
Thrust Balancing
Cut-Water
Dynamically
Balanced Impeller
PACO LF/LC/LCV | 3
The PACO LF and LC pumps utilize a double volute
design that offers a distinct advantage over single
volute designs. The double volute design incorpo-
rates two cutwaters located at 180°, which divide
the flow into two geometrically similar regions of
the volute.
The resultant hydraulic forces within the pumps
are equal and opposed. As a result, the net radial
force is maintained at a very low level throughout
the operating range of the pump, and shaft de-
flection is kept to a minimum.
A typical single volute pump is normally designed
to operate at or near the best efficiency point (BEP).
In actual application, many pumps stray away
from BEP due to load variances and/or changes in
the system head curve.
As single volute pumps begin to operate away
from BEP, the resultant radial load increases dra-
matically, causing increased shaft loads, deflec-
tion, and vibration. Excessive radial loads can
cause premature failure of the mechanical seal,
bearings, and shaft.
A double volute design ensures that hydraulic radial
loads are equal and opposed and thereby nullified.
Pump operation remains stable throughout the en-
tire performance curve, with minimal shaft deflec-
tion, prolonging seal, bearing, and shaft life.
*According to studies by the U.S. Department of Energy
FEATURES AND BENEFITS
4 | Features and Benefits
PACO LF FRAME MOUNTED END SUCTION PUMP
Footed Bearing Frame > Enhances ease of maintenance and provides proper support of rotating equipment during servicing
Footless Volute
> Establishes single point support for reducing alignment restrictions, which extend seal and bearing life
> Permits discharge orientation flexibility
> Minimizes the eects (misalignment, flange strain) of thermal expansion on volute
Permanently Sealed for Life Bearings > Reduce environmental contaminants and pump maintenance
Machined Mounting Surfaces and
Fabricated Base Plate > Aid in alignment
Choice of Motor Enclosures > Increases flexibility of design
Back Pull-Out Design > Enables maintenance without disturbing piping
Double Volute Design > Reduces radial loads, internal recirculation, and turbulence, which increases eciency, lowers life cycle
costs, and prolongs seal and bearing life
Large Seal Chamber > Allows for various seal configurations and customization
Integrally Cast Diuser Vane > Reduces turbulence and pre-rotation by providing laminar flow into oversized impeller eye, resulting in
decreased need for extended horizontal suction pipe runs, elbows, or suction guides
Francis Vane Impeller Design > Increases eciency and reduces NPSHr
Bronze Case Wear Rings > Extend pump life and increase pump eciency (included as standard)
> Provide simple and inexpensive renewal of “like new” operating tolerances, even after years of operation
Impellers
> Trimmed to exact customer specifications for customization
> Static and dynamically balanced to ISO 1940-G3 for reduced noise and vibration
> Hydraulically balanced to decrease thrust loads and prolong seal and bearing life
PACO LC/LCV CLOSE COUPLED END SUCTION PUMPS
Close Coupled Design > Provides compact construction and space savings
Registered Fit > Eliminates machine tolerance stacking
> Provides positive placement of components for permanent rigid pump to motor alignment
Permanent Rigid Alignment > Eliminates need for alignment
> Prolongs seal and bearing life
Industry-Standard JM Frame Motor > Simplifies motor replacement
Type LCV Pump > Oers vertical mounting of close coupled design for increased space savings
No Grouting Requirements > Makes installation easy
Francis Vane Impeller Design > Increases eciency and reduces NPSHr
Impellers
> Trimmed to exact customer specifications for customization
> Static and dynamically balanced to ISO 1940-G3 for reduced noise and vibration
> Hydraulically balanced to decrease thrust loads and prolong seal and bearing life
THE INDUSTRY STANDARD FOR PREMIUM PUMPS
Performance you can count on. Quality you can expect. Reliability you can trust.
PACO LF/LC/LCV | 5
LF/LC/LCV
End Suction Pumps
Technical Data
Flow, Q: max 6,000 gpm
Head, H: max 400 feet
Fluid temp.: max 275° F
HP range: 1/3 to 300 hp
Discharge sizes: 1” to 10”
Applications
• HVAC
• Plumbing
• Industrial
• Wastewater
Standard Features
• Lead-free bronze construction
• Dynamically balanced enclosed-type
impellers
• Mechanical seal or packed box
• Suction and discharge pressure
gauge taps
• Full-flanged connections on
discharges 2-1/2” and larger
• Internal case suction splitter
• Low NPSH requirements
• Wear rings
• Rigid designed steel base with
machined pump and motor
mounting surfaces
Optional Features
• Materials of construction
• Alloy shafts and sleeves
• Seal materials and configurations
• Motor enclosures (TEFC or explosion-
proof)
Certifications
• ISO 9001 Certified
• ANSI/NSF-50 Standard Certified
available
• ANSI/NSF-61 Standard Certified
available
CONSTRUCTION FEATURES
FEATURE LC(V) LF MATERIAL(S)
Volute Cast Iron - ASTM A48, CL 30
Impeller Bronze - I836, C89833
Case Wear Rings Bronze - NiAI Bronze, ASTM B148, C95400
Backplate Cast Iron - ASTM A48, CL 30
Motor Shaft Carbon Steel
Pump Shaft AISI 1045, 303, 304, 316
Shaft Sleeve I836, C89833
Coupling N/A Flex Coupling
Coupling Guard ANSI/OSHA Compliant
Packing Braided Synthetic, Graphite
Mechanical Seal Conventional, Cartridge, Single, Double
Stand Cast Iron, Fabricated Carbon Steel
CASE
WORKING
PRESSURE
ANSI
FLANGE
Standard 175 psi 125 lb.
Optional 350 psi* 250 lb.
* Some models available, RTF
LF/LC/LCV Performance Range
6 | Technical Specifications
PACO LF/LC/LCV | 7
WE HAVE YOU COVERED
Grundfos offers a full line of PACO brand products to cover all your pumping needs. Visit www.pacopumps.com
for information about all of our pumps plus an online selection tool, life cycle cost calculations, technical data,
and CAD drawings.
PARTS & SERVICE
Grundfos is committed to excellence in
after-sales service. Genuine PACO parts
are pre-engineered and pre-packaged to
simplify selection, ordering, and stocking.
Virtually all required parts for PACO prod-
ucts are available as kits.
PACO KP Split Case Pump PACO KPV Vertically
Mounted Split Case Pump
PACO VL Vertical
Inline Pump
PACO QDSC Submersible
Pump
PACO VSM/VSMS Vertical
Space Miser Pump
PACOFlo 9000
Booster System
PACO GR Condensate
Return Pump
PACO NCP Dry-Pit
Non-Clog Pump
www.grundfos.com/cbs
L-PP-SL-003 • 06/09 (US)
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All rights reserved worldwide.
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USA
GRUNDFOS Pumps Corporation
West th Terrace
Olathe, Kansas
Phone: () -
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USA
Grundfos CBS Inc. – PACO Pumps
Koomey Road
Brookshire, TX
Phone: () -
Telefax: () -
CANADA
GRUNDFOS Canada Inc.
Brighton Road
Oakville, Ontario
LH C
Phone: () -
Telefax: () -
MEXICO
Bombas GRUNDFOS de Mexico S.A. de C.V.
Boulevard TLC No.
Parque Industrial Stiva Aeropuerto
C.P. Apodaca, N.L. Mexico
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