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    Flow Control Valve 1/4″ NPT With Gauge

    Part #: MI-S-638

    The Milton S-638 (S-638-1) is a 1/4? NPT in-line air flow control valve equipped with a built-in dial gauge, designed to regulate airflow from full flow down to complete shutoff. With a maximum pressure rating of 150 PSI, it supports up to 5 SCFM at 100 PSI, and operates across a temperature range of 40 °F to 250 °F (or 140 °F in some references) for air and non-corrosive liquid applications.