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Control Valve · Glossary

What is a Volume Booster?

pneumatic amplifierControl Valve

A volume booster is a pneumatic relay that copies the positioner output at much higher air flow, to stroke large actuators fast.

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Volume Booster Explained

The positioner signal goes to the booster, which supplies and exhausts large volumes of air to the actuator. A bypass adjustment keeps the positioner stable.

Quick exhaust valves are a simpler option that only speed up venting.

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Calculators for Volume Booster

CalculatorActuator Stroke Time CalculatorFree online calculator with formula and worked example.CalculatorVolume Tank Sizing CalculatorFree online calculator with formula and worked example.

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Free downloadControl Valve Stroke Test ProcedureFree step by step procedure, Word and PDF.

Frequently Asked Questions

What is a Volume Booster?

A volume booster is a pneumatic relay that copies the positioner output at much higher air flow, to stroke large actuators fast.

Why does a booster make the valve unstable?

Without the bypass set correctly, the booster responds to small signals too strongly and the loop oscillates.

Booster or quick exhaust?

Booster for fast moves both ways in control; quick exhaust for fast fail action on venting.

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