1/2 bronze Gear pump
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Manufacturer:
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Series (32 Models):
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Product Name:1/2 bronze Gear pump
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Model Number:N993R-03
Pump Only PEO, Relief 1/2" ports
Oberdorfer N993R-03
Pump Only PEO, no motor.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 (R) 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.
| Model Number | N993R-03 |
|---|---|
| part number | N993R-03 |
| Series | N Oberdorfer Gear Pumps Bronze |
| Max Flow (GPM.) | 8 |
| Max Flow GPH | 480 |
| TDH Maximum (Ft) | 173 |
| TDH Maximum (PSI) | 75 |
| Inlet Connection Type | FNPT |
| Inlet (In.) | 0.5 |
| Outlet Connection Type | FNPT |
| Outlet (In.) | .05 |
| Wetted Materials | 304SS, Bronze |
| Elastomers / O-ring | Buna-Nitrile |
| Speed (RPM.) | 1725 |
| Self Priming | Yes |
| Max Operating Temperature (F) | 140 |
| Viscosity | Glycerine 880.00 cp 5000.00 ssu |
| Shaft | 304SS |
| Mechanical Seal | No |
| Mechanical Seal Type | Single |
| Coupling | Y |
| Other | Suction lift varies based on wet gears or dry. See manual. |
| Pump Bearing | Carbon |
| Drain | No |
| Port Rotation | Yes |
| Country of Manufacture | United States |
| Weight (Lbs) | 6.000000 |
| Warranty (YRS.) | 1 |
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