#pumps #seals #mechanicalseal
there are five categories of pumps
1. positive displacement pumps
2. impulse pumps
3. velocity pumps
4. gravity pumps
5. valve less
what are the types of positive displacement pumps.
there are three categories of positive displacement pumps.
a. rotary type
gear pump, screw pump, rotary vane pump, flexible impeller pump, peristaltic pump,
b. reciprocating type
plunger pump, piston pump, vibratory pump,
c. linear type
rope pump and chain pump
