Pilot oil storage pressure

Why do I need a separate pilot oil supply?

To remove all risk of interactions between the systems actuators and the pilot control valves we can add a separate pilot oil supply. These have a separate, stable pressure feed to the pilot valves that is separate from the main supply flow. This is because the main pressure is likely to fluctuate depending on what its consumers are doing.

Does pilot oil pressure fluctuate?

Just because the system has a separate pilot oil supply or drain, don't assume this will not have pressure fluctuations itself. Some valves, particularly reducing and relieving valves, can have surprising high drain flows. These in themselves can upset pilot drain pressures and should be checked.

What is a pilot pressure system?

Pilot pressure systems are used in a number of different ways and with a number of different approaches. The simplest is probably as shown above with a small directional valve controlling a larger directional valve.

What is pilot pressure control?

This module discusses the use of hydraulic pilots supplies and feeds for controlling hydraulic systems. We cover the background and reasons behind why pilot pressure control is used along with discussing the types of application in which it is used. It is common in hydraulics to use a smaller 'pilot' valve to control a larger 'main stage' valve.

Why does a pilot valve need a different pressure level?

It may also require a different pressure level to the pilot valves. Pilot pressure supplies may be taken straight from the main fluid supply via a pressure reducing valve to give them a separate, stable pressure. Alternately they may have a completely different pump and filter system supplying them.

Where is the pilot oil supply implemented?

The pilot oil supply is implemented internally from channel P of the main valve. The pilot oil return is implemented externally via port Y into the tank. In the subplate, port X is closed. (For applications outside these values, please consult us!)