1546 1 Liberty Le51A 2 Brochure User Manual

480 1 Liberty Le51A Brochure 480_1_Liberty LE51A Brochure

480 1 Liberty Le50 Series Brochure 480_1_Liberty LE50 Series Brochure

567 1 Liberty Le52A-2 Brochure 567_1_Liberty LE52A-2 Brochure

580 1 Liberty Le51M Brochure 580_1_Liberty LE51M Brochure

825 1 Liberty Le51M-2 Brochure 825_1_Liberty LE51M-2 Brochure

User Manual: Pump 1546 1 Liberty Le51A-2 Brochure

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LE50-Series
LE50-Series
Models:
LE51M 115V, 12a, Manual
LE51A 115V, 12a, Automatic
LE52M208-230V, 6.8a, Manual
LE52A 208-230V, 6.8a, Automatic
Automatic models feature a mercury-free wide-angle
float with series plug—allows for manual operation of
pump separate from switch.
Sewage
Pumps
1/2 hp
2" Solids-Handling
112 GPM at 10' TDH
25' Maximum Head
Features:
•Heavy cast iron construction
•Oil filled, thermally protected motor
•Permanently lubricated bearings
•2-vane, corrosion resistant
*HYTREL®impeller
•All stainless steel fasteners and
rotor shaft
•Quick-disconnect 10' standard power
cord allows replacement of cord
in seconds without breaking seals
to motor. (25' length optional)
*HYTREL®is a registered trademark of DuPont Polymers
LE50 Series V4:LE50 Series V4 2/10/12 9:14 AM Page 1
Liberty Pumps • 7000 Apple Tree Avenue • Bergen, New York 14416 • Phone 800-543-2550 Fax (585) 494-1839
www.libertypumps.com Copyright © Liberty Pumps, Inc. 2012
All rights reserved. LLIT 1500 R02/12
Specifications subject to change without notice.
LE50-SERIES
TECHNICAL SPECIFICATIONS
PUMP
The pump(s) shall be model _________________
as manufactured by Liberty Pumps, Bergen, NY,
or equal.
The pump(s) shall have a capacity of ____ GPM at
a total dynamic head of ____ feet.
Motor size shall be 1/2 horsepower, single phase,
60 hz. and ____ volt operation.
MOTOR
The pump motor shall be of the submersible
type, oil filled, hermetically sealed and shall be
thermally protected. The overload element shall
automatically reset when motor cools. Motor
windings shall be of the class B insulation rating.
The rotor shaft shall be made of 416 stainless
steel and shall be supported by lower and upper
ball bearings.
The power cord shall be of the quick-disconnect
design allowing replacement of the cord without
breaking seals to the motor and/or oil chamber.
IMPELLER
The pump shall have a 2-vane semi-open
impeller capable of passing a 2" spherical solid.
SEAL
The shaft seal shall be of the carbon/ceramic
unitized design, with BUNA N elastomers and
stainless housings.
EXTERNAL CONSTRUCTION
The pump volute, legs and motor housing
shall be gray iron castings, class 25 or
better. All fasteners shall be of 300-series
stainless steel or brass. All castings shall be
epoxy powder coated before assembly.
LEVEL CONTROL
Automatic units shall be controlled by an
adjustable, mercury-free, wide angle float switch.
Float cord shall be equipped with a series plug
for manual bypass operation.
MODELS HP VOLTS PHASE AMPS DISCHARGE AUTOMATIC IMPELLER
LE51M 1/2 115 1 12 2" FNPT NO 2-VANE SEMI-OPEN
LE51A 1/2 115 1 12 2" FNPT YES 2-VANE SEMI-OPEN
LE52M 1/2 230 1 6.8 2" FNPT NO 2-VANE SEMI-OPEN
LE52A 1/2 230 1 6.8 2" FNPT YES 2-VANE SEMI OPEN
10' cord standard on above models. For 25' cord options, add a “-2” suffix to model number.
Example: LE51A-2 for Model LE51A with 25' cord.
DIMENSIONAL DATA:
Weight: LE51M: 42 LBS.
Height: 14"
Major Width: 11.5" (manual models)
Maximum fluid temperature 140˚ F.
PERFORMANCE CURVE 60 hz
1725 RPM
U.S. Gallons Per Minute
Total head in feet
28
24
20
16
12
8
4
020 40 60 80 100 120 140
Total Head in Meters
Liters Per Minute
076 151 303 454
160
530
227 379 606
8.5
7.3
6.1
4.9
3.7
2.4
1.2
0
®
LE50 Series V4:LE50 Series V4 2/10/12 9:14 AM Page 2

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