APTech Series AK M60 - Manual (Page 9)

AK M60 Manual P/N 00-15000012 Rev 1
Page 9 of 13
5. OPERATION
This section describes operation of the AK M60 crossover manifold.
Figure 3. AK M60 Installation Schematic
5.1. AK M60 Operation
5.1.1. General Principle of Operation
The knob for the crossover regulator has an “IN SERVICE” label with an arrow. When the knob is turned
so that the arrow points toward the Source B (right) cylinder (approximately the 4:30 o’clock position
with the outlet pressure gauge at 12:00 o’clock position), then the Source B (right) cylinder is the primary
gas supply and the Source A (left) cylinder is the standby gas supply. This knob position is shown in
Figure 1. When the knob is turned so that the arrow points toward the Source A (left) cylinder
(approximately the 7:30 o’clock position), then the Source A (left) cylinder is the primary gas supply and
the Source B (right) cylinder is the standby gas supply.
The crossover regulator is comprised of a fixed outlet pressure regulator and an adjustable (limited range)
outlet pressure regulator. The Source A (left) cylinder supplies the fixed outlet pressure regulator. The
Source B (right) cylinder supplies the adjustable outlet pressure regulator. The adjustable outlet pressure
regulator has the “source selection outlet” knob with the “IN SERVICE” label and arrow. This regulator
can be rotated only 270 degrees to adjust the Source B outlet pressure slightly above or slightly below the
Source A fixed outlet pressure. It is this slight change in Source B outlet pressure that selects which
cylinder is supplying gas and which cylinder is on standby. When the cylinder supplying gas is depleted,
then it is time to replace that cylinder using the protocol in Section 5.1.3 or 5.1.4 as appropriate.
5.1.2. Initial Pressurization with Process Gas
Confirm that an initial leak test has been performed and all leaks repaired.