Figure 4-14.—MD regulator operational drawing.
inlet assembly into the inlet supply valve (2), and
2. The reduction chamber incorporates the
then into the first-stage reduction chamber (3) by
first-stage relief valve assembly (4) to protect the
action of the inlet supply valve control lever 24.
regulate; against overpressures.
The pressure of the flowing oxygen is registered
3. The demand valve assembly (5) is opened
on the oxygen supply pressure gauge.
when the pressure across demand outer
4-19
