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

Single-stage regulators reduce pressure in a single step to effect pressure within a specific range. Regulators crafted in this manner will show a slight variation in delivery pressure as the cylinder pressure falls during use. Because of this, single-stage regulators are best suited for applications where a constant outlet pressure is not crucial, where an operator can watch and readjust pressure, or where inlet pressure is constant.

Dual-stage regulators have the same function as single-stage regulators. But delivery pressure holds steady as cylinder pressure declines. Higher accuracy in pressure control is kept because the pressure reduction is performed in two steps. Dual-stage regulators are recommended for applications requiring a constant outlet pressure throughout the life of a gas cylinder.

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