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FEATURES :
• Bronze Corrosion Resistant Castings
• Special Cast Bronze Gears
• Stainless Steel Shafts & Fasteners
• Formed Ring Seal Packing
• Heavy Duty Carbon Bearings (Self Lubricating)
• Positive Displacement Flow
SUCTION LIFT :
Close tolerances and the positive pumping action make the rotary gear
pump capable of lifting water on the suction side as high as 20 feet.
Though gear pumps are self priming, a foot valve is recommended. If
possible, wet the gears with liquid to be pumped for the first dry start.
Liquid retained in the system and gear chambers serves to "wet"
the pump on subsequent starts.
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PERFORMANCE:
Self Priming Centrifugal Pumps
| Model |
Max.
Capacity @ 1750 rpm |
Max.
Diff. Press. |
| N991 |
2.1 US/gpm |
150
psi |
| N992 |
4.7
US/gpm |
100
psi |
| N993 |
8.5
US/gpm |
50
psi |
| N994 |
10.5
US/gpm |
100
psi |
| N999 |
0.85
US/gpm |
100
psi |
| N970 |
19.8
US/gpm |
150
psi |
| N1100 |
40.0
US/gpm @ 1150 rpm |
150
psi |
PEDISTAL MOUNT: Bronze gear
Pumps
| Model |
Max.
Capacity @ 1750 rpm |
Max.
Diff. Press. |
| N1000 |
2.1 US/gpm |
100
psi |
| N2000 |
4.0
US/gpm |
100
psi |
| N3000 |
7.25
US/gpm |
100
psi |
| N4000 |
10.6
US/gpm |
100
psi |
| N7000 |
19.8
US/gpm |
100
psi |
| N9000 |
23.3
US/gpm |
100
psi |
| N11 |
60.0
US/gpm |
100
psi |
| N13 |
83.0
US/gpm |
100
psi |
Notes:
At
150 PSI the above selections are suitable for pumping fluids with lubricity
(e.q. oils, polymers). Service life will be increased substantially
if the liquid pumped is clean and has some degree of lubricity. These
positive displacement pumps have tight tolerances. Fine abrasives like
sand, silt, or powders in suspension will accelerate pump wear and reduce
throughput .
PUMP BY-PASS AND ROTATION: The pump by-pass is not
intended to be a metering or flow control device. Its main purpose is
to function as a pressure relief when the desired set point is exceeded,
overheating can occur within 5 -10 minutes if the discharge line is
completely shut off for extended periods. Reversing rotation reverses
the"IN" and "OUT" ports and the location of the
by-pass ports have to be reversed. The by-pass valve is factory set
at 50 p.s.i. To increase the setpoint, turn the by-pass valve adjusting
screw in a clockwise direction.
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