Comparison between rotary vane & ram type steering gear

Rotary vane	Ram type
1. Simple in design.	1. Complex.
2. Save space	2. More space required.
3. Easy to maintenance.	3. Difficult to maintenance.
4. More effective.	4. Less effective.
5. Small torque limit.	5. High torque limit.
6. Higher first cost.	6. Cheaper.
7. sealing difficult.	7. Sealing easy.