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Tuthill 4000 Series Process Pumps
 4000 Series process pumps incorporate an internal gear pump design. The design has only two moving parts. Moving parts are hardest hit by abrasive and heat wear, so having fewer moving parts increases the reliability of the 4000 Series. Features of 4000 Series gear pumps include:
- Economically priced
- Positive displacement internal gear construction
- Accurate repeatable flow characteristics
- Reliable performance
- Special materials of construction permit handling many different fluid types
- Less downtime and maintenance
The Series 4000's pumping action comes from a rotor, idler gear, and crescent-shaped partition. A partial vacuum is formed when the pump starts and the rotor teeth begin to turn. The fluid fills the space between the idler gear's teeth and the rotor's teeth. The fluid passes around the crescent. On the pressure side, the force of the teeth meshing discharges the liquid. 4000 Series pumps can pump nearly any fluid including:
Adhesives
Alcohol
Asphalt
Barium sulfate slurry
Benzene
Creosote
Crude oil
Diatomaceous earth
Enamel
Ethylene glycol
Fats
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Fuel oils
Fuller's earth
Gasoline
Glue
Iron oxide slurry
Kerosene
Lacquer
Lard
Linseed oil
Liquid feed
Molasses
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Mineral oil
Paint
Paper coating
Petrolatum
Printing inks
Soap Liquors
Solvents
Tall oil
Transformer oil
Varnish
Vegetable oils
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