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.