Characteristic of hele-shaw & swash plate pump

Hele-shaw pump	Swash plate pump
1.     Constant speed variable del. p/p.	1. Constant speed variable del. p/p.
2.     Output can be varied from zero to full in either direction.	2. Output can be varied from zero to full in either direction.
3.     Radial bores churning the oil raises the temp.	3. Produce greater torque.
4.	4. No heating of oil and no churning effect.
5.	5. Better weight torque ratio.