[79] Circuit diagram: 2-way pressure regulator

It is appropriate to use PRVs only when different pressures are required in an installation. The mod of operation of pressure regulator will thus be explained here by taking an example with two control circuits. The first control circuit acts via a flow control valve on a hydraulic motor which drives a roller. This roller is used to stick together multi-layered printed circuit boards. The second control circuit acts on a hydraulic cylinder which draws the roller towards the boards at an adjustable reduced pressure.

This example can be used as a preliminary stage to the introduction of the 3-way PR. If the 2-way PR is closed due to the fact that the preset maximum pressure has been reached, thickening of the material of the workpieces would cause an increase in the pressure on the outlet side of the PR to a higher value than desired. (See also the animation for topic 84.)