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N990 Close Coupled Bronze Rotary Gear Pumps

Product Name:

Bronze Rotary Gear Pump w/ motor & relief valve

Model Number:




Oberdorfer Close coupled bronze rotary gear pumps.
  • Bronze Construction with SS shaft
  • Helical gears for quiet operation
  • Self-lubricating carbon bearings
  • O-ring seal for max. leak protection
  • The pump drive shaft is connected to the motor shaft by a flexible coupling
  • The relief valve is 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. If used continuously, the pump will over heat. The 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.

Additional Information

Model Number N990RH-M46
Series N990 Close Coupled Bronze Rotary Gear Pumps
Warranty (YRS.) 1
Max Flow (GPM.) 15
TDH Maximum (Ft) 46
TDH Maximum (PSI) 19.91
Horsepower 0.75
Inlet Connection Type FNPT
Inlet (In.) 1
Outlet Connection Type FNPT
Outlet (In.) 1
Wetted Materials 304SS, Bronze
Voltage (V) 115/230
Phase (Ø) 1
Motor Frequency 60
Motor ODP
Speed (RPM.) 1140
Motor Frame 56C
Self Priming Yes
Suction Lift (FT.) 20
Max Operating Temperature (F) 225
Max Volume Of Suspended Solids (0/0) 0
Max Particle Size (In) 0.01
Viscosity Glycerine 880.00 cp 5000.00 ssu
Shaft 304SS
Mechanical Seal BUNA LIP SEAL
Mechanical Seal Type Double
Coupling Y
Applications Constant Pressure, Coolant, Dosing, Flooded Suction, Fuel Oil, Self-Priming
Other Clockwise rotation from pump end.
Pump Bearing Carbon/graphite
Drain Yes
Port Rotation Yes
Country of Manufacture
Weight (Lbs) 42
Time to Ship (DAYS) 2-3 days

Supporting Docs

3/43/4" Bronze gear pump 1HP Size: (88.88 KB) Extension: jpg
3/43/4" Bronze gear pump 1HP Size: (42.42 KB) Extension: jpg
View FileBronze Rotary Gear Pump w/ motor  Size: (134.85 KB) Extension: pdf