Glossary · Pneumatics and hydraulics
Pressure regulator
Also known as: Pressure-reducing valve, Regulator
German: Druckregler
In fluid power, a pressure regulator is a valve that reduces the supply pressure to a set, largely constant outlet pressure regardless of changes in inlet pressure and flow.
- Fluid power
In one sentence
A pressure regulator reduces supply pressure to a set, largely constant outlet pressure despite changes in inlet pressure and flow.
Example
A separate pressure regulator lowers the gripper supply to 3 bar so fragile parts aren't crushed.
How it applies
- Engineering: Regulators set working pressure for the machine or for individual functions, reducing air consumption and forces. Lockable regulators prevent unauthorized adjustment.
- Commissioning: Set pressures are entered in the commissioning record.
- Operation: Changing pressure changes forces and speeds; where force limitation matters for safety, the setting must be protected and verified.
- Documentation: State set pressures in the technical data and on the circuit diagram, and describe who may adjust them. Note that a regulator is not a safety device against overpressure.
Pressure regulator vs. pressure-relief valve
A pressure regulator reduces pressure downstream during normal operation. A Pressure-relief valve limits maximum pressure by opening to tank or atmosphere and protects the system from overpressure.