Pressure regulator

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What is a pressure regulator?

Various consumers and applications receive their compressed air supply centrally from the main compressed air system. However, not every application always requires or allows the same pressure. With the help of pressure regulators or pressure reducers, the operating pressure can be reduced to the required level for the individual application or downstream components. At the same time, any fluctuations in the inlet pressure are compensated for.

The efficiency of a system is significantly influenced by pressure regulators in addition to the safety of the system. They always set the optimum pressure required for operation. Excessively high pressures mean unnecessary energy costs and, in some cases, unnecessarily high wear on downstream components.

How does a pressure regulator work?

The adjusting spring of the pressure regulator is tensioned or released by turning the adjusting knob. The tension of the spring directly influences the force and therefore the associated output pressure P2 of the pressure regulator. The force of the setting spring acts on the spring plate of the diaphragm, which in turn opens or closes the valve connected underneath with a force fit. When the valve opens, compressed air flows from the inlet (inlet pressure P1) to the outlet of the pressure regulator. Pressure is created in the system on the outlet side of the pressure regulator and simultaneously below the diaphragm.

If the force below the diaphragm is greater than the force of the adjusting spring acting above the diaphragm, the valve closes. As a result, the set outlet pressure P2 is reached. When pressure is removed from the outlet side of the pressure regulator, the outlet pressure drops and so does the force below the diaphragm. The valve opens and compressed air flows from the inlet side to the outlet side until the set pressure P2 is reached again. This continuous process ensures a constant P2 value.

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