Oberdorfer # N26HDL Bronze Gear Pump end

The Oberdorfer N26HDL is a Bronze pedestal Gear Pump end only, bare shafted pump end, with Outboard Ball Bearing, with Bronze Gears, Viton Lip Seal, Stainless Steel shaft, 2 Inch NPT by 2 Inch NPT Ports, replacement pump end only without a Motor. This pump is, internally, a double gear pump, with 2 drive gears and 2 idler gears, and must not be run at pump speeds above 900 R.P.M. as this will result in extreme wear. This pump can be noisy, as large gear pumps are inherently noisy due to metal to metal gear contact. Make installations far removed from office or other relatively quiet people areas. Some noise reduction can be realized by lowering pump speed and use of isolation mounts and lines, usually the small amount of noise reduction achieved does not justify the effort and expense. This gear pump can pump most common liquids, and is suitable for water, oil, and mild compatible chemicals in the pH-range from 4-10, as well as diesel fuel. The close tolerances of the gears in this pump require clean liquids with no abrasives, as abrasives will wear down the pump and cause poor performance. Gear pumps are positive displacement pumps and each shaft revolution displaces a definite amount of liquid relatively unaffected by the back pressure in the discharge line. The shaft speed and flow are directly proportional, as the flow increases with speed increase, and the power demand (horsepower) increases with shaft speed and discharge pressure. This pump is self-priming, and the maximum suction lift for this pump is 20 feet, however, the suction line should be as short as possible. A relief valve is necessary to protect the pump and system if the discharge line becomes blocked or closed. This pump is equipped with a Viton lip seal with a metal case, that are spring energized, and single lip type. These are intended to provide minimum friction drag with positive sealing. These lip seals are easily replaced by pressing out the old seal and pressing in a new replacement. The pump has an O-ring cover seal for maximum leak protection. The bearings in this pump are designed of high performance carbon-graphite material selected for wear resistance and long service life that require no lubrication. The recommended discharge pressure limits for this pump are 100 PSI for water and non-lubricants, 150 PSI for oil and other lubricants, as the high pressure will accelerate wear. For the longest service life keep the pressure as low as possible. The maximum shaft speed is 900 RPM. Viscous liquids require lower pump speeds and the maximum Viscosity limit is up to 50,000 SSU. This pump end does not include a motor and is just the bare shafted pump end only. Complete pump and motor assemblies can be fabricated with a pump, coupling, coupling guard, motor, and baseplate.