3/4" Bronze gear pump 1HP

3/4" Bronze rotary gear pump without relief valve and close coupled to a 1 HP 115v/1/60 1725 RPM TEFC motor.Pump housings and gears are made of top quality bronze, shafts are stainless steel 303. Bearings are made 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. Shaft speed and flow are directly proportional. Motor HP needs to increase with a increase in pump pressure. The nature of a positive displacement pump. See Chart.

These pumps are suitable for all liquids that are compatible with bronze. Most common liquids are water, oil, and mild chemicals in the pH-range of 4 to 11. Viscous liquids require reduced shaft speeds of 1150 RPM or lower.

Liquids containing solids, abrasives, powders or paint pigments are definitely not recommended for gear pumps. If abrasives are unavoidable, use a very low shaft speed. The recommended liquid temperature range is 32oF to 140oF for longest pump life. If more extreme temperature conditions exist, our factory should beconsulted. Freezing of water-filled pumps can cause damage and must be avoided. Oils at low temperatures are very viscous requiring a lower speed or extra power.

As a general rule, the suction lift should be kept at an absolute minimumby placing the pump as close to the liquid source as possible. A gearpump in new condition can lift 20 feet of water in the suction line. A foot valve(preferably with built-in strainer) is recommended at the beginning of thesuction line. For a first start-up, the pump should be primed to avoid dry running.Minimum size of the suction pipe is the size of the pump inlet port. Forlonger suction lines (over 3 feet), or for viscous liquids, the pipe size shouldbe at least one size or two sizes larger than the pump inlet port.