NRVs (or non-return valves) are installed within hydraulic systems in
order to prevent hydraulic fluid flowing in the opposite direction to
which it is intended.
Operation of a non-return valve can be clearly understood by using Sphaera's
interactive training aid. Pressure each side of the NRV can be controlled
in order to demonstrate or observe the changing pressures and flows.
A hydraulic NRV (non-return valve) in operation.
More Basic Hydraulics Training Material
For instructors, schools and colleges, Sphaera has developed a range of
affordable interactive instructor-led CBT, available individually or as a complete pack.