presented by:
Sudhanshu Shekhar Jha

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ABSTRACT ON “GEAR PUMP”
A gear pump uses the meshing of gears to pump fluid by displacement.
As the gears rotate they separate on the intake side of the pump, creating a void and suction which is filled by fluid. The fluid is carried by the gears to the discharge side of the pump, where the meshing of the gears displaces the fluid. The mechanical clearances are small— in the order of 10 μm. The tight clearances, along with the speed of rotation, effectively prevent the fluid from leaking backwards.
Pump formulas:-
• Flow rate in US gal/min = Displacement X rpm/231 (displacement in in3/revolution)
• Power in hp = US gal/min X (lbf/in³)/1714
Application:- They are generally used in:
1. PETROCHEMICALS: Pure or filled bitumen, diesel oil, crude oil, lube oil etc.
2. CHEMICALS: Sodium silicate, acids, plastics, mixed chemicals etc.
3. PAINT & INK.
4. RESINS & ADHESIVES.
5. PULP & PAPER: acid, soap, lye, black liquor, kaolin, lime, latex, sludge etc.
6. FOOD: Chocolate, fillers, sugar, vegetable fats and oils, molasses, animal food etc.