This aids in settling the contamination and separating the air from the fluid. Large reservoirs are desirable for cooling. A large reservoir also reduces recirculation which helps settle contamination and separate air. However, due to space limitations in mobile and aerospace systems, the benefits of a large reservoir may have to be sacrificed. But, they must be large enough to accommodate thermal expansion of the fluid and changes in fluid level due to system operation.
Reservoirs are of two general types nonpressurized and pressurized.
This includes the hydraulic systems of ground and ship installations. A typical reservoir for use with ground and ship installations is shown in figure 9-1. This type of reservoir is made of hot rolled steel plates and has welded seams. The ends extend below the bottom of the reservoir and serve as supports. The bottom of the reservoir is convex, and a drain plug is incorporated at the lowest point.