Oberdorfer OBN991R Bronze Gear Pump, No Motor

The Oberdorfer N991R represents a Bronze Gear Pump without an attached motor, featuring an integrated Internal Relief Valve, Bronze Gears, a Buna Lip Seal, and 1/4 Inch NPT by 1/4 Inch NPT Ports. It serves as a replacement pump end only, designed for a variety of common liquids, including water, oil, and mild compatible chemicals within a pH range of 4-10, as well as diesel fuel. It's essential to note that this gear pump's optimal performance relies on clean liquids devoid of abrasives, as abrasive substances can lead to pump wear and reduced efficiency. Gear pumps, functioning as positive displacement pumps, displace a fixed quantity of liquid with each shaft revolution, with the discharge line's back pressure having minimal impact. The relationship between shaft speed and flow is directly proportional, meaning that increased speed results in higher flow rates, and elevated shaft speed and discharge pressure correspond to greater power requirements (horsepower)