Basic Hydraulic Principles

Hydraulic NRV
(Non-Return Valve)

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.


Hydraulic NRV

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.

Click on the links below for more information:


Pascal's Law

A demonstration of Pascal's Law...

Hydraulic Pressure and Force

The relationship between hydraulic pressure and force...

Simple Hydraulic System

How a simple hydraulic system works...


Hydraulic Brakes

An example of a simple interactive hydraulic braking system...

Hydraulic Swash Plate Pump

How a hydraulic swash plate pump works...

Hydraulic NRV (non-return valve)

Operation of a hydraulic NRV (non-return valve)...



These and other similar classroom training products can be purchased online now by visiting our training products list.

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