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Bronze Pedestal Gear Pump w/ relief valve

3/4" Packed
Model Number
N7000R
$1,044.00
oberdorfer gear pump 3/4"

Oberdorfer N7000R

Bronze Pedestal Gear pump with relief valve. Often used as a oil pump on large ships to pre-lube the bearings. Pump flow is reversible.
  • 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.
  • Maximum shaft speed is 1750 rpm.
  • Recommended pressure limits are 100 psi for water and non-lubricants, 150 psi for oil and lubricants.
  • A relief valve is a 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. 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.
  • 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
More Information
Model Number N7000R
part number N7000R
Series N9000 Pedestal Bronze Rotary Gear Pumps
Max Flow (GPM.) 23
Max Flow GPH 1140
TDH Maximum (Ft) 346
TDH Maximum (PSI) 150
Inlet Connection Type FNPT
inlet size Less than 1"
Inlet (In.) 0.75
Outlet Connection Type FNPT
Outlet (In.) 0.75
Wetted Materials 304SS, Bronze
Speed (RPM.) 1725
Self Priming Yes
Suction Lift (FT.) 20
Max Operating Temperature (F) 350
Viscosity Glycerine 880.00 cp 5000.00 ssu
Shaft 304SS
Mechanical Seal PACKING
Mechanical Seal Type Single
Coupling Y
Other Shaft Size: 5/8". Relief valve factory set at 50 PSI. Pump is bi-rotational or reversible. Reversing the rotation reverses the In Outlet ports and the location of the by-pass port has to be reversed.
Pump Bearing Carbon
Drain No
Port Rotation Yes
Country of Manufacture United States
Weight (Lbs) 15.000000
Warranty (YRS.) 1

Supporting Docs

Supporting Docs
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