Setting and selecting a pressure regulator: how does it stabilise working pressure?
A pressure regulator reduces the supply pressure to the required working pressure and holds it steady - regardless of fluctuations in the supply line. It is set with a gauge and the knob is locked. The type (relieving or non-relieving) and the flow capacity decide the right selection.
View pressure regulatorsWhat does a pressure regulator do?
A pressure regulator reduces the incoming supply pressure to the required working pressure and stabilises it - regardless of whether the supply pressure fluctuates or demand rises. When the downstream pressure drops under load, the regulator opens further; when it rises, it throttles. Cylinders, valves and tools then run at a constant, defined pressure, for example 6 bar.
An integrated or attached gauge shows the set outlet pressure - the basis for every clean adjustment.
Relieving or non-relieving - which type?
The key type difference concerns lowering the set point. A relieving regulator vents excess pressure through a relief port when you lower the set point. A non-relieving regulator can only reduce pressure as air is drawn off downstream.
| Type | When lowering the set point | Use |
|---|---|---|
| Relieving | actively vents excess pressure | most common choice, quick downward correction |
| Non-relieving | pressure falls only through use | where no exhaust air may enter the system |
| Precision regulator | fine response, low hysteresis | sensitive applications, stable fine pressure |
How do I set a pressure regulator correctly?
To set it, bring the regulator to the target value with the gauge while the system runs: unlock the adjusting knob, turn slowly to the required pressure and read it on the gauge. Approach the value from below and check it under real demand, then lock the knob so the setting cannot drift.
Frequently asked questions
What is a pressure regulator for?
It reduces the supply pressure to the required working pressure and holds it steady, even when the supply pressure fluctuates or demand rises. Pneumatic components then run at a stable, defined pressure.
What does relieving mean?
A relieving regulator vents excess pressure through a relief port when you lower the set point, so the outlet pressure drops immediately. A non-relieving regulator only reduces pressure as air is drawn off downstream.
How do I set the working pressure?
Unlock the adjusting knob, turn the regulator slowly to the target value while the system runs and read it on the gauge. Approach from below, check under real demand and then lock the knob.
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