1546 1 Liberty Le51A 2 Brochure User Manual

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User Manual: Pump 1546 1 Liberty Le51A-2 Brochure

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LE50 Series V4:LE50 Series V4

2/10/12

9:14 AM

Page 1

LE50-Series
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

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.

LE50 Series V4:LE50 Series V4

2/10/12

9:14 AM

Page 2

LE50-SERIES

TECHNICAL SPECIFICATIONS
PUMP

IMPELLER

The pump(s) shall be model _________________
as manufactured by Liberty Pumps, Bergen, NY,
or equal.

The pump shall have a 2-vane semi-open
impeller capable of passing a 2" spherical solid.

SEAL

The pump(s) shall have a capacity of ____ GPM at
a total dynamic head of ____ feet.

The shaft seal shall be of the carbon/ceramic
unitized design, with BUNA N elastomers and
stainless housings.

Motor size shall be 1/2 horsepower, single phase,
60 hz. and ____ volt operation.

EXTERNAL CONSTRUCTION

MOTOR

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.

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.

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.

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.
MODELS HP
LE51M
LE51A
LE52M
LE52A

1/2
1/2
1/2
1/2

VOLTS

PHASE

AMPS

DISCHARGE

AUTOMATIC

IMPELLER

115
115
230
230

1
1
1
1

12
12
6.8
6.8

2" FNPT
2" FNPT
2" FNPT
2" FNPT

NO
YES
NO
YES

2-VANE SEMI-OPEN
2-VANE SEMI-OPEN
2-VANE SEMI-OPEN
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.

PERFORMANCE CURVE 60 hz

DIMENSIONAL DATA:
Weight: LE51M: 42 LBS.

0

Height: 14"

®

1725 RPM
606
8.5

24

7.3

20

6.1

16

4.9

12

3.7

8

2.4

4

1.2

0

20

151

40

60

80

100

454

120

530

140

Total Head in Meters

Maximum fluid temperature 140˚ F.

Total head in feet

Major Width: 11.5" (manual models)

Liters Per Minute
379
303
227

28

76

160 0

U.S. Gallons Per Minute
Specifications subject to change without notice.

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



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