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

Single-stage regulators reduce pressure in one step to deliver pressure within a defined range. Regulators designed like this will show a negligible variation in delivery pressure as the cylinder pressure decreases during use. Because of this, single-stage regulators are the right choice for uses where a constant outlet pressure is not crucial, where an operator can supervise and readjust pressure, or where inlet pressure is constant.

Dual-stage regulators provide the same function as single-stage regulators. However, delivery pressure holds steady as cylinder pressure decreases. Higher accuracy in pressure control is kept because the pressure reduction is brought about in two steps. Dual-stage regulators are recommended for applications necessitating a constant outlet pressure throughout the life of a gas cylinder.

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