MODEL N993R-06 EXTENDED WEAR CLOSE COUPLED GEAR PUMP

MODEL N993R-06 EXTENDED WEAR CLOSE COUPLED GEAR PUMP
EXTENDED WEAR
CLOSE COUPLED GEAR PUMP
MODEL
N993R-06
DESIGNED FOR CAR WASH INDUSTRY
MODEL N993R-06
(SHOWN WITH ADAPTER BRACKET)
PERFORMANCE
FEATURES
„ Compact design eases installation and use in limited space areas.
„ Construction is bronze, PEEK and stainless steel wetted
components.
„ Bronze and PEEK gears for quiet operation and extended
performance.
„ Close tolerance design allows for consistent performance and
suction lift, priming from 20 feet.
„ Flow adjustment through integral bypass.
GENERAL DESCRIPTION
Pump housings are made of top quality bronze. The drive gear is
bronze and the idle gear is PEEK. The shafts are 440C stainless steel
hardened to a Rc 60 , stress relieved and passivated. Bearings are made
of high performance carbon-graphite material selected for wear resistance and extended service life.
Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the back
pressure in the discharge line. Shaft speed and flow are directly proportional. Recommended pressure limits are 100 PSI for water and low viscosity fluids commonly used in the car wash industry. The maximum shaft
speed is 1725 RPM.
DRIVE ARRANGEMENT
Close coupled gear pumps are mounted directly to the electric motor by
means of a suitable adapter bracket. The pump drive is connected to the
motor shaft by a flexible coupling. Adapterless motors are available.
LIQUIDS AND TEMPERATURE
These pumps are suitable for all liquids that are compatible with
bronze. Most common liquids are water, oil, and mild chemicals in the pH
range of 4 to 11. Viscous liquids require reduced shaft speeds of 1140
RPM or lower. (Consult factory.)
Liquids containing solids, abrasives, powders, or paint pigments
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pumps.com
are definitely not recommended for gear pumps. If abrasives are unavoidable, use a very low shaft speed.
The recommended liquid temperature range is from 32o F to 140o F for
best pump life. If more extreme temperature conditions exist, factory should be
consulted. Freezing of water-filled pumps can cause damage and must be
avoided. Some fluids at low temperatures can be viscous requiring a lower
speed or extra power.
SUCTION LIFT
As a general rule, the suction lift should be kept at an absolute
minimum by placing the pump as close to the liquid source as possible.
A gear pump in new condition can lift 20 feet of water in the suction line.
A foot valve (preferably with built-in strainer) is recommended at the
beginning of the suction line. For a first start-up, the pump should be
primed to avoid dry running. MInimum size of the suction pipe is the size
of the pump inlet port. For longer suction lines (over 3 feet) or for viscous
liquids, the pipe should be at least one size or two sizes larger than the
pump inlet port.
SPECIFICATIONS
Differential Pressure:
Shaft Speed:
Suction Lift:
Temperature:
Fluid Viscosity:
100 PSI max.
1725 RPM max.*
20” max.
32°F to 140° F
33 - 50,000 SSU*
Notes:
* Maximum discharge pressure and shaft speed are reduced with higher
fluid viscosities.
PHONE 800-4
448-1
1668; (315) 437-0
0361
FAX (315) 463-9
9561
EXTENDED WEAR CLOSE COUPLED
GEAR PUMP
MODEL
N993R-06
DESIGNED FOR CAR WASH INDUSTRY
PARTS LIST
EXPLODED VIEW
DRIVE GEAR ASSY 33047
9359
9361
9364
5373
drive gear
drive shaft
key
retain rings (2)
No.
Part Name
Req
N993 R-06
Part #
1
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
Port Size
screw
body assy.
o-ring
dowel pin
bearing
drive gear assy.
idle gear assy.
cover (R)
lipseal, buna
coupling
screw
nut plug
poppet
spring by-pass
adj. screw
nut lock
nut by-pass
fiber washer
6
1
1
2
4
1
1
1
1
1
1
1
1
1
1
1
1
3
9837 - I5
9307N-06
9797-038
8885
5024-01
33047
33048
9308N-06
5007
9363
5595
1838
6535
6302
5237
5240
5239
6533
IDLE GEAR ASSY 33048
9360
9362
9364
5373
idle gear
idle shaft
key
retain rings (2)
DIMENSIONS
4/04
www.oberdorfer-p
pumps.com
Specifications are subject to change without notice.
PHONE 800-4
448-1
1668; (315) 437-0
0361
FAX (315) 463-9
9561
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