FL50-Series
FL50-Series
Effluent Pumps
1/2" Solids Handling
1/2 hp
Features:
· Semi-open impeller permits passage
of solids without clogging
· Cast iron construction with all
stainless and brass fasteners
· 416 stainless steel rotor shaft
· Oil-filled, hermetically sealed motors
with thermal overload protection
· Permanently lubricated upper
and lower ball bearings
· Unitized, carbon and ceramic shaft seal
· Single float, mercury-free level control with
series plug for manual bypass operation
standard on automatic models
· Adjustable pumping range
· 1-1/2" FNPT discharge
· Quick-disconnect 10' standard power cord
allows replacement of cord in seconds
without breaking seals to motor.
(25' length optional)
FL60-Series
63' Max Head
FL50-Series
48' Max Head
Models:
FL51M
115V, 12a, Manual
FL51A
115V, 12a, Automatic
FL52M
208-230V, 7a, Manual
FL52A
208-230V, 7a, Automatic
FL61M
115V, 13a, Manual
FL61A
115V, 13a, Automatic
FL62M
208-230V, 7a, Manual
FL62A
208-230V, 7a, Automatic
Automatic models feature a mercury-free
wide-angle float with series plug allows
for manual operation of pump separate
from switch.
®
C
US
Mid-Range
FL60-Series
FL60-Series
6/10 hp
High Head
60
50
40
30
20
10
0
10
U.S. Gallons Per Minute
T
otal Head in Feet
T
otal Head in Meters
Liters Per Second
0
20
30
40
50
0
4
12
1.0
2.1
3.2
8
60
4.3
16
3450 RPM
TECHNICAL SPECIFICATIONS
FL50- & FL60-SERIES
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 ______ horsepower, single phase, 60 hz.
and ______ (115 or 208-230) 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 upper and lower ball bearings.
IMPELLER
The pump shall have a semi-open impeller capable of
passing a minimum 1/2" spherical solid and shall be
constructed of class 25 or better cast iron.
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 castings shall be epoxy
powder coated before assembly. All fasteners shall be of
300-series stainless steel or brass.
LEVEL CONTROL
The pump shall be controlled by an adjustable, mercury-
free switch sealed in a polymeric float, and shall have a
series plug for manual bypass operation.
MODELS
HP
VOLTS
PHASE AMPS
DISCHARGE
AUTOMATIC
FL51M
1/2
115
1
12
1-1/2" FNPT
NO
FL51A
1/2
115
1
12
1-1/2" FNPT
YES
FL52M
1/2
208-230
1
7
1-1/2" FNPT
NO
FL52A
1/2
208-230
1
7
1-1/2" FNPT
YES
FL61M
6/10
115
1
13
1-1/2" FNPT
NO
FL61A
6/10
115
1
13
1-1/2" FNPT
YES
FL62M
6/10
208-230
1
7
1-1/2" FNPT
NO
FL62A
6/10
208-230
1
7
1-1/2" FNPT
YES
10' cord standard on above models. For 25' cord options, add a "-2" suffix to
model number. Example: FL61A-2 for Model FL61A with 25' cord.
DIMENSIONAL DATA:
Weight:
FL50/60: 57 LBS.
Height:
13.75"
Major Width:
10.25"
(manual models)
Maximum Fluid
Temperature:
140° F.
FL50 PERFORMANCE CURVE
FL60 PERFORMANCE CURVE
70
60
50
40
30
20
10
0
10
3450 RPM
U.S. Gallons Per Minute
T
otal Head in Feet
T
otal Head in Meters
Liters Per Second
0
20
30
40
50
0
4
12
1.0
2.1
3.2
8
60
4.3
16
20
Copyright © Liberty Pumps, Inc. 2008
All rights reserved. LLIT 2600 R3/08
Specifications subject to change without notice.
Not recommended for heads below 15'
Not recommended for heads below 15'