N11500_2012

N11500_2012
Bronze Pedestal Rotary Gear Pumps
N11500N • N11510
1 1/4" NPT Ports
PERFORMANCE:
CAPACITY WATER AT 60°F
PACKING STYLES
· N11500-21- UPPER DRIVE
· N11510-21 - LOWER DRIVE
LIP SEAL STYLES
· N11500-S5- UPPER DRIVE
· N11510-S5 - LOWER DRIVE
FEATURES:
• Bronze Corrosion Resistant Castings
• Stainless Steel Shafts & Fasteners
• Self-Lubricating Carbon Bearings
• Acrylic Graphite Packing or Viton®-Teflon® Lip
• For Mechanical Seals, see Models N11HDM
• For Heavy Pulley loads, see Model N11HDP
Note: Dotted lines (---) recommended for intermittent duty
only due to accelerated wear at higher speeds and pressures.
DRIVE:
Either direct drive with flexible coupling or pulley drive can be
used. For pulley driven pumps a pillow block bearing must be
used at the drive shaft end to absorb the belt forces. The drive
shaft is sufficiently long enough to accommodate a pillow block
in addition to the pulley.
Viscous liquids such as molasses or oils require a lower pumping speed, in extreme cases as low as 200 RPM. Consult factory
for recommended speeds and increased horsepower requirements. Large suction lines are required to prevent cavitation
which can cause pump destruction.
Correct alignment is absolutely essential for satisfactory pump
life. Recheck alignment after the piping has been connected to
the pump.
Liquids with specific gravities heavier than water such as dry
cleaning fluids require an increase in motor horsepower directly proportional to the increase in specific gravity over water.
LIQUIDS AND TEMPERATURE:
Service life will be increased substantially if the liquid pumped
is clean and has a lubricity value. These pumps have extremely
close tolerances. Fine abrasives like sand, silt, or powders in
suspension will destroy pumping ability.
SUCTION LIFT:
A rotary gear pump is capable of lifting water on the suction
side as high as 20 feet. Though gear pumps are self-priming, a
foot valve is recommended. For pumping water directly from
streams or ponds, a wire mesh strainer must be used at the
beginning of the suction line to prevent stones from entering
the pump. Strainer and foot valve are commercially available
as combination units.
Liquids compatible with bronze, stainless steel and the acrylic
graphite packing can be pumped. Solvent resistant packings
and Teflon®* packings are also available. See a chemical compatibility table or check factory. When possible, flush the pump
with water after using.
Temperature extremes are detrimental to service life and
should be avoided. Basic metals of construction allow temperature range of -400F to 4000F. the acrylic graphite packing
is rated to 5000F. Freezing liquid in the pump can deform or
damage the pump.
ROTATION:
N11510-21
(shown)
* VITON® is a trademark of DuPont Dow Elastomers. VITON® or equivalent FKM may be
used. Teflon® is a registered trademark of DuPont. Teflon® or equivalent PTFE will be used.
Bronze Pedestal Rotary Gear Pumps
N11500 · N11510
Exploded View and Parts List
Lip Seal:
Packing Seal:
1
2
3*
Cover
Screw
Ret.
Ring
4*
5*
6*
7*
8*
9*
10
11
O-Ring
Bearing
Drive
Gear
Idle Shaft
Drive
Shaft
Idle Gear
Body
O-Ring
Model
Configuration
Qty. 1
Qty. 8
Qty. 4
Qty. 1
Qty. 4
Qty. 1
Qty. 1
Qty. 1
Qty. 1
Qty. 1
Qty. 1
N11500-21
Packing/Upper
9333NN5N
5393
7651
9797-158
5108
9833
7652
5685
9834
9331NG7N
6515
N11510-21
Packing/Lower
9333NN5N
5393
7651
9797-158
5108
9833
7652
5685
9834
9331NG8N
6515
N11500S5
Lip/Upper
9333NN5N
5393
7651
9797-158
5108
9833
7652
5685
9834
9331NG7N
9797-224
N11510S5
Lip/Lower
9333NN5N
5393
7651
9797-158
5108
9833
7652
5685
9834
9331NG8N
9797-224
12*
13
14
15
16
17
18*
19
20
Packing or Lip
Seal
Screw
Nut
Gland/Seal
Hsg
Screw
Seal
Adapter
Key
Key
Dowel Pin
Repair Kit
Model
Configuration
Qty. 1 or 3
Qty. 2
Qty. 2
Qty. 1
Qty. 2
Qty. 1
Qty. 2
Qty. 1
Qty. 2
N11500-21
Packing/Upper
7624
5916
8395
7451
9905
9904
6518
5576
8597
10642
N11510-21
Packing/Lower
7624
5916
8395
7451
9905
9904
6518
5576
8597
10642
N11500S5
Lip/Upper
7262
5916
----
7853
----
----
6518
5576
8597
11048
N11510S5
Lip/Lower
7262
5916
----
7853
----
----
6518
5576
8597
11048
* Repair kit contains these items (and body gasket for older models). For shaft and gear subassemblies only refer to kit 12015.
Dimensions
N11500-21 Shown
Visit www.oberdorfer-pumps.com to find in-depth
descriptions of the world’s leading high-quality,
dependable pumps.
5900 Firestone Drive, Syracuse, NY 13206
Phone: (800) 448-1668; (315) 437-0361 • Fax: (315) 463-9561
Due to ongoing product improvements, data shown here
is subject to change without notice. Contact Oberdorfer
Pumps for latest specifications.
N11500.100112
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