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5.6 SEQUENCE OF FUNCTIONS
Both cylinders are full and connected to the unit. The change-over switch lever is pointing to
the right. The cylinder and service gas valves are being opened slowly.
When the right-hand cylinder is empty the pressure reducer switches automatically to the left-
hand cylinder.
The left-hand cylinder is now providing the gas supply, the back pressure decreases slightly.
purging
gas
service gas
outlet
purging
gas
Ready for use / Gas fl ow from right hand cylinder
purging
gas
service gas
outlet
purging
gas
Gas fl ow from left-hand cylinder / Right cylinder empty
