Variable-volume reservoirs (VVRs) are compact hydraulic reservoirs that can often replace conventional hydraulic reservoirs, with benefits to users that include lighter weight, smaller size and lower costs, as well as addressing potential safety, oil contamination and environmental issues. They’re similar to bootstrap-type reservoirs that have been used for decades in aerospace applications. In a classic…

By Josh Cosford, Contributing Editor Hydraulic power units are both the source of hydraulic energy and fluid conditioning. The hydraulic reservoir provides a mounting surface for the hydraulic pump and its prime mover while offering up real estate to mount filters, coolers, valves and accessories. In addition, the reservoir stores the hydraulic fluid, providing a […]

Hydraulic reservoir design is critical in power unit performance, so selecting the right style elements will ensure efficient circuit design. If you have a hydraulic system, you have a reservoir. Full stop. Even “reservoir-less” systems still require an expansion tank to hold excess fluid. Aside from such unconventional designs, hydraulic reservoirs offer benefits above and…