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

Single-stage regulators decrease pressure in just one step to produce pressure within a defined range. Regulators designed accordingly will show a negligible variation in delivery pressure as the cylinder pressure falls during use. Because of this, single-stage regulators are the right choice for applications where a constant outlet pressure is not critical, where an operator can monitor and readjust pressure, or where inlet pressure is constant.

Dual-stage regulators perform the same function as single-stage regulators. Nevertheless, delivery pressure remains the same as cylinder pressure declines. Higher accuracy in pressure control is maintained because the pressure reduction is achieved in two steps. Dual-stage regulators are suggested for applications necessitating a constant outlet pressure for the life of a gas cylinder.

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