Oberdorfer # CB62060GRC Bronze Gear Pump end

The Oberdorfer CB62060GRC is a Bronze Gear Pump end only, Carbonator mount, for mounting on a motor (motor is not included), with built in Internal Relief Valve, with Bronze Gears, Buna Mechanical Seal, Stainless Steel shaft, replacement pump end only without a Motor. This pump is a drop in replacement for model GCBN3V. Can also be considered as replacement for model 4KHP9. A pressure relief valve built into the pump returns excess liquid directly to the tank rather than to the suction side of the pump, thus avoiding heat build-up in the pump. This pump is a carbonator mount gear pump and is considered superior to a carbonator Vane Pump. The carbonator motor mounting uses a circular clamp, similar to a hose clamp, as means of attaching the pump to a specially machined hub on the motor. This concept was first developed for the vending machine industry to pump carbonated beverages in soft drink dispensers. The main advantages are compactness and economy due to the elimination of the adapter casting. Carbonator motors are readily available from electric motor distributors. 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 has an integral built-in relief valve which is not intended to be a metering or flow control device. Its main purpose is to function as a discharge pressure relief when the spring tension is exceeded by the discharge pressure causing it to bypass internally. The relief valve is always on the discharge side in this pump series. The factory pressure setting on this relief valve is 50 PSIG. To increase bypass pressure, just turn the relief valve adjusting screw in a clockwise direction. This pump is equipped with a Buna-N mechanical seal of the standard pusher bellows type or wedge style. It can be expected to provide long and trouble free service provided the seal materials are compatible with fluid being pumped, dry running is avoided, abrasives are kept away from the seal area, and the pump and driver are properly aligned. 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 1750 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 intended for close-coupled mounting to NEMA 48 Carbonator Mount footed motors using clamp and T coupling. The pump can be mounted in any orientation relative to the motor base.