N11500_2000

N11500_2000
BRONZE PEDESTAL
ROTARY GEAR PUMPS
OBERDORFER PUMPS
MODELS
N11500-21
N11510-21
A Subsidiary of Thomas Industries Inc.
1 1/4” NPT PORTS
MODEL N11500-21- UPPER DRIVE
MODEL N11510-21 - LOWER DRIVE
FEATURES
g Bronze Corrosion Resistant Castings
g Stainless Steel Shafts & Fasteners
g Self-Lubricating Carbon Bearings
g Packing (Braided Acrylic yarn with special lubricant and Graphite)
g For Mechanical Seals, see Models N11HDM
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.
Correct alignment is absolutely essential for satisfactory pump
life. Recheck alignment after the piping has been connected to the
pump.
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.
Liquids compatible with bronze, stainless steel and the acrylic
graphite packing can be pumped. Solvent resistant packings and
Teflon(R)* 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
-40 0F to 400 0F. the acrylic graphite packing is rated to 500 0F.
Freezing liquid in the pump can deform or damage the pump.
Viscous liquids such as molasses or oils require a lower pump ing speed, in extreme cases as low as 200 R.P.M. Consult factory
for recommended speeds and increased horsepower requirements.
Note: Dotted lines(---) recommended for intermittent duty only
due to accelerated wear at higher speeds and pressures.
Large suction lines are required to prevent cavitation which can cause
pump destruction.
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.
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 recom mended. 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.
ROTATION
N11510-21
*Teflon(R) is a registered trademark of DuPont. Teflon(R) or equivalent PTFE will be used.
www.oberdorfer-pumps.com
PHONE 800-448-1668; (315) 437-0361
FAX (315) 463-9561
MODELS
BRONZE PEDESTAL
ROTARY GEAR PUMPS
OBERDORFER PUMPS
N11500-21
N11510-21
A Subsidiary of Thomas Industries Inc.
EXPLODED VIEW AND PARTS LIST
PACKING
1
1
2
3
Cover
Screw
Snap
1 Reqd
8 Reqd
N11500-21 9333NN5N
N11510-21 9333NN5N
Pump
1
1
1
O-Ring
Bearing
Drive
Idle
Gear
Shaft
Shaft
Gear
4 Reqd
1 Reqd
4 Reqd
1 Reqd
1 Reqd
1 Reqd
1 Reqd
1 Reqd
5393
7651
9797-158
5108
9833
7652
5685
9834
9331NG7N
5393
7651
9797-158
5108
9833
7652
5685
9834
9331NG8N
13
14
15
16
17
18
19
20
Nut
Gland
Screw
Seal
Key
Key
Dowel
Repair
Pin
Kit
1 Reqd
2 Reqd
2 Reqd
1 Reqd
2 Req'd
1
Drive
1
9
1
7
12
8
1
6
Ring
11
Pump
1
5
No.
4
Idle
10
Body
O-Ring
Packing Screw
1 Reqd
3 Reqd
2 Reqd
2 Reqd
6515
7624
5916
8395
7451
9905
9904
6518
5576
8597
10642
N11510-21
6515
7624
5916
8395
1
Repair Kits contain items 3,4,5,6,7,8,9,12 and 18.
7451
9905
9904
6518
5576
8597
10642
No.
N11500-21
Adapter
1 Reqd
DIMENSIONS
10/00
www.oberdorfer-pumps.com
Specifications are subject to change without notice.
PHONE 800-448-1668; (315) 437-0361
FAX (315) 463-9561
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