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N Oberdorfer Gear Pumps Bronze

Product Name:

Bronze gear pump

Model Number:


Quick Overview

3/4HP 115/230v


Bronze gear pump. 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 backpressure 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. Great for diesel fuel transfer and glycol pump. 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 also available as 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.

See performance curve under images tab.

Additional Information

Model Number N993C-M26
Series N Oberdorfer Gear Pumps Bronze
Warranty (YRS.) 1
Max Flow (GPM.) 8
TDH Maximum (Ft) 231
TDH Maximum (PSI) 100
Horsepower 0.75
Inlet Connection Type FNPT
Inlet (In.) 0.5
Outlet Connection Type FNPT
Outlet (In.) 0.5
Wetted Materials 304SS, Bronze
Elastomers Buna-Nitrile
Voltage (V) 115/230
Phase (Ø) 1
Motor Frequency 60
Motor ODP
Speed (RPM.) 1725
Self Priming Yes
Suction Lift (FT.) 15
Max Operating Temperature (F) 14
Max Specific Gravity 1.4
Max Volume Of Suspended Solids (0/0) 0
Max Particle Size (In) 0
Viscosity Glycerine 880.00 cp 5000.00 ssu
Shaft 304SS
Mechanical Seal ROTARY LIP
Mechanical Seal Type Single
Coupling Y
Applications Constant Pressure, Coolant, Flooded Suction, Fuel Oil, High Pressure, Hydrostatic Test, Self-Priming
Other For diesel fuel transfer simply set on drum.
Pump Bearing Carbon
Cord Length (Ft.) 0
Port Rotation Yes
Country of Manufacture United States
Weight (Lbs) 42
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