Riparazione e Manutenzione Erogatori
55
MC9 1
st
stage setting
• MC9 S.C. 1
st
stage setting procedures, referring to the picture on
page 57:
• Connect the setting pressure gauge with one of the first stage LP
ports
• Connect the whole regulator (including both 1st and 2nd stages)
with a 200 bars pressurized tank, or with an equally pressurized
workbench.
• Note: even though the regulator is overbalanced (that is, the
intermediate pressure increases as tank pressure decreases), it's a
good idea to calibrate the first stage to 200 bar to properly control
how the regulator functions. Intermediate pressure will rise slightly
as pressure in the tank drops (circa + 0.6 bar at tank 50 bar).
• Turn slowly the air valve on, while pressing the second stage air
outlet button. Do that some times more.
January 2009 Rev. MC9/B Ed.C/13
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