APTech Series AK M60 - Manual (Page 13)

AK M60 Manual P/N 00-15000012 Rev 1
Page 13 of 13
6.4. Low delivery line outlet pressure
Possible causes:
Flow restriction.
High flow at point of use
Correction:
Shut off the supply to the point of use and see if the line outlet pressure returns to normal setting. If
outlet pressure returns to normal, then high flow or a flow restriction is the likely cause. Check the
flow requirement at the point of use.
6.5. Both cylinders empty simultaneously
Possible causes:
External leak on high pressure connection from standby cylinder to AK M60 crossover manifold.
Vent valve leaking past seat (if installed).
High flow at point of use.
Seat leak on crossover regulator supplied by standby gas cylinder.
Correction:
Check for external leaks especially on the high pressure line from the standby cylinder to the
AK M60 crossover manifold.
If there is a vent valve on the line from the gas cylinder to the AK M60 crossover manifold, check to
see if the vent valve is leaking across the seat.
Verify the flow demand is below the manifold rating. In general, high flow will empty the “IN
SERVICE” cylinder faster than the standby gas cylinder.
Momentarily shut off the cylinder valve on the standby gas cylinder. If the pressure on the standby
gas cylinder pressure gauge drops, then high flow demand or a seat leak on the regulator supplied by
the standby gas cylinder is the probably cause.