Oberdorfer Gear Pump, Ryt Gears Model# N10011G-67
Product
Information
Pump housings and gears are made of top quality bronze, shafts are
303 stainless steel. 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
backpressure in the discharge line. Shaft speed and flow are directly
proportional.
FEATURES
- Bronze Corrosion Resistant Castings
- Special Cast Bronze Gears
- Stainless Steel Shafts & Fasteners
- Formed Ring Seal Packing (Lip & Mechanical Seals on Special Order)
- Heavy Duty Carbon Bearings (Self Lubricating)
- Positive Displacement Flow
DRIVE
Either direct drive with flexible coupling or
pulley drive can be used. Make sure both flexible coupling halves are
properly aligned. When using a pulley, do not overtighten the belt.
Also, to absorb belt side thrust at higher pressures and larger size
pumps, an external ball bearing support is recommended -- consult
factory.
LIQUIDS & TEMPERATURES
Service life will be increased substantially if
the liquid pumped is clean and has some degree of lubricity. These
positive displacement pumps have tight tolerances. Fine abrasives like
sand, silt, or powders in suspension will accelerate pump wear and
reduce throughput.
Liquids compatible with bronze and stainless steel can be pumped
providing proper seal has been specified (see chemical compatibility or
check factory). When possible, flush the pump after each usage.
Temperature extremes are detrimental to service life and should be
avoided. Basic metals of construction allow a temperature range of -40
to 400°F. Some lip and mechanical seal elastomers have a limit of 212°F.
(see engineering data or check factory). Allowing a liquid to freeze in
the pump can cause damage.
SUCTION LIFT
Close tolerances and the positive pumping action
make the rotary gear pump capable of lifting water on the suction side
as high as 20 feet. Though gear pumps are self priming, a foot valve is
recommended. If possible, wet the gears with liquid to be pumped for the
first dry start. Liquid retained in the system and gear chambers serves
to “wet” the pump on subsequent starts.
PERFORMANCE
Close tolerances and the positive pumping action
make the rotary gear pump capable of lifting water on the suction side
as high as 20 feet. Though gear pumps are self priming, a foot valve is
recommended. If possible, wet the gears with liquid to be pumped for the
first dry start. Liquid retained in the system and gear chambers serves
to “wet” the pump on subsequent starts.
