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Oberdorfer N993RM-J07 N993 Pump  motor N993 Pump & motor N993 Pump & motor
Oberdorfer N993RM-J07 N993 Pump  motor

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Manufacturer: Oberdorfer
Series (31 Models):

N Oberdorfer Gear Pumps Bronze

Product Name:

N993 Pump & motor

Model Number:


Gallons Per Hour: 480 (8 GPM)
Voltage: 115/230
Horsepower: 1/2

Quick Overview

1/2HP 115/230v Relief Vavle


Pump housings and gears are made of top quality bronze; shafts are from stainless steel 303. Bearings are designed of high performance carbon-graphite material selected for wear resistance and long 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 non-lubricants, 150 psi for oil and lubricants. Maximum shaft speed is 1750 rpm.

A relief valve is necessary in the system if the discharge line contains any throttling devices, such as a shut-off valve, a spray nozzle or other restrictive device. This will return the liquid to the suction side or to the tank. The relief valve is a part of the pump itself (R-model pumps). However, built-in relief valves are only good for intermittent service. If used continuously, the pump will over heat. A built-in relief valve is strictly a safety device against overpressure. It will not work successfully as a pressure or flow control device. For this purpose a separate relief valve in the pressure line must be used.

Service life will be increase substantially if the liquid pumped is clean and has a lubricity value. These pumps have extremely close tolerances.

Additional Information

Model Number OBN993RM-J07
part number N993RM-J07
Series N Oberdorfer Gear Pumps Bronze
Warranty (YRS.) 1
Max Flow (GPM.) 8
Max Flow GPH 480
TDH Maximum (Ft) 160
TDH Maximum (PSI) 70
Horsepower 0.5
Horse Power (HP) 1/2
Inlet Connection Type FNPT
Inlet (In.) 0.5
inlet size Less than 1"
Outlet Connection Type FNPT
Outlet (In.) 0.5
Wetted Materials 304SS, Bronze
Elastomers / O-ring Buna-Nitrile
Voltage (V) 115/230
Voltage (Range) 110-120/220-240
Phase (Ø) Single(1)
Motor Frequency 60
Motor ODP
Speed (RPM.) 1725
Self Priming Yes
Suction Lift (FT.) 20
Max Operating Temperature (F) 14
Viscosity Glycerine 880.00 cp 5000.00 ssu
Shaft 304SS
Mechanical Seal Type Single
Coupling Y
Applications Constant Pressure, Coolant, Flooded Suction, Fuel Oil, High Pressure, Hydrostatic Test, Self-Priming
Other Suction lift varies based on wet gears or dry. See manual.
Pump Bearing Carbon
Cord Length (Ft.) 0
Port Rotation Yes
Country of Manufacture United States
Weight (Lbs) 24
Time to Ship (DAYS) 2-3 days

Supporting Docs

N993 Bronze Pump & MotorN993 Bronze Pump & Motor Size: (93.71 KB) Extension: jpg
N993 Bronze Pump & MotorN993 Bronze Pump & Motor Size: (55.39 KB) Extension: jpg
California prop 65