Safety in Systems
All types and brands of control valves, including proportional valves, can fail. Therefore, the necessary
protection against the serious consequences of a functional failure should always be built into the
system.
General safety considerations
For each application an assessment should be made for the consequences of the system in case of
pressure failure and uncontrolled or blocked movements.
Warning
Because the proportional valve is used in many different applications and under different operating
conditions, it is the sole responsibility of the manufacturer to ensure that all performance, safety and
warning requirements of the application is met in his selection of products and complies with relevant
machine specific and generic standards.
Control system example
An example of a control system using an aerial lift is shown below:
Aerial lift
This example breaks down the control system into smaller bits explaining the architecture in depth. Even
though many Danfoss components are used in the PVG control system.
The function of the control system is to use the output from the PVE together other external sensors to
ensure the PLUS+1 main controllers correct function of the aerial lift.
Service and Parts Manual
PVG 16/32/128/256
Function
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Danfoss | October 2018 AX284661889190en-000101 | 5
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