Spec Sheet

Liberty Pumps • 7000 Apple Tree Avenue • Bergen, New York 14416 • Phone [phone] Fax [phone]
www.libertypumps.com
Copyright © Liberty Pumps, Inc. 2011
All rights reserved. LLIT 2000 R09/11
280-SERIES
1/2 hp Submersible Effluent/Sump Pumps
The Liberty 280 series provides a cost effective “mid-
range” pump for on-site waste water systems, liquid
waste transfer and commercial heavy-duty sump pump
applications that require higher head or more flow.
Designed around Liberty’s unique “Uni-Body” casting,
the 280-Series will provide years of reliable performance.
All Models Feature:
• Vortex style impeller permitting passage of solids
up to
3
⁄4"
• 416 stainless steel rotor shaft
• Permanently lubricated upper and lower ball bearing
• Epoxy powder coat finish
• All fasteners – corrosion-resistant stainless steel
• 1
1
⁄2" Discharge
• Stainless steel bottom screen – easily removable
• Maximum fluid temperature: 140˚ F.
• 280-Series Cord Lengths
Motor Specifications
1
⁄2 hp 60 Hz 3450 RPM
Oil filled, thermally protected
115 V. Models 8.5 amps
208/230 V. Models 4.6 amps
Performance Curve: 280-Series
Dimensional Data:
Weight: 29 lbs.
Height: 13"
Major Width: 10" (model 287)
Minimum Sump Diameters:
Model 281, 283…14"
Model 287 VMF…10"
Factory switch Model 281, 283 Model 287
settings VMF
Turn on level 13" 9.5"
Turn off level 7" 4.0"
The Model 283 features a fully adjustable wide-angle float.
Differential adjustments can be made easily by tethering the float
to the discharge pipe or other mounting point. Vertical float model
287 is not adjustable.
Model 280
Manual,
no switch
Model 281
Wide angle
float switch
with quick-
disconnect
Model 283
Wide angle
float switch
with series
(piggy-back)
plug
Model 287
VMF-Series
Vertical mag-
netic float for
smaller pits –
will operate in
a 10" diameter
sump
40
35
30
25
20
15
10
5
0
12
11
9
8
6
5
3
2
0
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70
Head (Feet)
U.S. Gallons Per Minute
(Meters)
Specifications are subject to change without notice.
0 38 78 114 156 228192 270
Liters Per Minute
Model 10' 25'(-2) 35'(-3) 50'(-5)
280 Standard Optional Optional Optional
281 Standard Optional Optional Optional
283 Standard Optional Optional N/A
287 Standard Optional N/A N/A
10' cord length standard on all models. For optional lengths,
add “-2, -3 or -5” suffix to model number.
Example: for model 280 with 35' cord, order 280-3
®
280 series V11:280 series C1V4 8/30/11 11:14 AM Page 2