What is the difference between a single-stage and a dual-stage regulator?

Single-stage regulators reduce pressure in merely one step to generate pressure within a specified range. Regulators created accordingly will display an insignificant variation in delivery pressure as the cylinder pressure decreases when in use. Because of this, single-stage regulators are most suitable for applications in which a constant outlet pressure is not vital, where an operator can monitor and readjust pressure, or where an inlet pressure is stable.

Dual-stage regulators perform the same function as single-stage regulators; however, delivery pressure holds constant as cylinder pressure declines. Heightened accuracy in pressure control is maintained because the reduction of pressure is achieved in two steps. Dual-staged regulators are recommended for applications that require a constant outlet pressure for the life of a gas cylinder.

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