3
XXX Series
DESCRIPTION OF PRODUCT
The 621 Series autoswitch is an automatic switchover system designed to provide a continuous supply of laser purity
gas. This unit may be used with one cylinder per side, or used with a manifold that has increased storage capacity.
The inlet of the switchover system may be configured with open ports, diaphragm valves, manifold connectors, or
flexible pigtails. The system, when configured with manifold connectors, is for use with the 528 Series Maniflex
system. The standard autoswitch system will maintain a regulated line pressure within the values shown in the table
below:
This model can be configured to be used in conjunction with an optional Remote Alarm. It cannot be connected
directly to AC line voltage. In addition to a Power Indicator light, the autoswitch is equipped with LED status
lights to indicate the condition of the gas cylinders. A green indicator light signifies a “Normal” condition while a
red light indicates an “Alarm” (Gas cylinder empty) condition. The autoswitch system includes a separate connector
that mates to the connector on the bottom of the unit. This will be needed to construct an interface cable between
the Remote Alarm and the autoswitch. Please refer to the ADI Manual that is included with the Remote Alarm for
wiring and operating instructions.
Line Regulator
Adjustment Knob
Inlet Gauge
Inlet Port
1/2” NPT Female
Delivery Gauge
Inlet Port
1/2” NPT Female
Inlet Gauge
Priority Valve
Outlet Port
1/4” Tube connection
Figure 1
MODEL
RANGE
621 3XXX
0-100 PSI (0-7 BAR)
621 5XXX
0-350 PSI (0-24 BAR)
621 7XXX
0-150 PSI (0-10 BAR)
The inlet pressure must be maintained above the value listed in the table below for the system to operate properly.
MODEL
RANGE
621 3XXX
265 PSI (18 BAR)
621 5XXX
540 PSI (37 BAR)
621 7XXX
265 PSI (18 BAR)
