1. Internal/External Gear Oil Pumps
Adrien Kresz

2. Source : http://www.pumpschool.com/principles/internal.htm
Rotor
Idler
Crescent
Suction/Discharge ports
Source :

3. Source : http://www.pumpschool.com/principles/internal.htm

4. Source : www.vikingpumps.com

5. Advantages :
Two moving parts
Non-pulsating discharge
Operates in both directions
Disadvantages :
-Limitations due to liquid and speed

6. Sources : - http://www. pumpschool. com/principles/internal. htm - www
Sources :
Questions???