A two-stage regulator functions similarly to two, single-stage regulators in series. The first stage reduces inlet pressure to a preset intermediate pressure, typically 350 to 500 psig.

• 两级调整器的运转同两个单级调整器串联是一样的。第一级把入口的压力降到预定的中间压力，该压力典型值为350到500 psig。