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This Guide is made available for the express use of owners and users of the Dive Lab XLDS systems.
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Document XLDS Guide – Section Four A
Revised September 30, 2019
31
SECTION FOUR A: RDC REPAIR / MAINTENANCE / OVERHAUL
Figure 59
Adjusting the Relief
1. Slowly open an HP air cylinder, approximately
1-2 turns, and pressurize the HP system.
2. Slowly bring pressure to the manifold, by
rotating the regulator adjustment knob in,
until the LP gauge reads the desired relief
pressure setting.
3. Slowly vent the pressure, below the desired
set pressure, using the pneumo valve. Then
slowly load the regulator, while watching the
gauge, to determine where the relief lifts at.
4. Repeat steps 2 and 3 until the desired setting
is achieved. Once adjusted, hold the spring cap
with the Allen wrench, and tighten the lock nut
counter-clockwise, with the 1” wrench, until
snug. Tighten using the force of three fingers
on the wrench. Or torque with torque wrench,
to 50 inch lbs.
Hylock SS Angle Relief
Overhaul
As of January of 2011, the relief valves being
installed in the XLDS RDC consoles is the Hylock®
Model RV2MF SS, similar in operation and
adjustment to the Circle Seal®, 0-400 psig
adjustable brass body relief. This valve is very
rugged and dependable, and can be easily
serviced by trained persons. Dive Lab strongly
recommends, only factory trained technicians
service this component. Overhaul is limited to
cleaning, and replacing the soft goods. If any
other damage is found, the valve should be
returned to Dive Lab, for repair.
Figure 60 (Hylock Angle Relief)
NOTICE
The relief can be set between 250-410 psig, to
accommodate different system configurations. To
adjust, the relief needs to be installed in the RDC, or
attached to a clean adjustable air source. This
procedure uses the installed RDC regulator, to set.
NOTICE
If the relief starts venting before the desired relief
setting is reached, slowly rotate the spring cap (8)
clockwise, using the 5/16” Allen wrench, until the
relief holds at, or just below, the desired setting
Then hand tighten the main cap (9), and back the
regulator off one – two turns.
NOTICE
The working pressure of the LP system is well
above the maximum relief setting, obtainable
using this 0-410 psig relief. The system will not
be damaged by setting the relief in place. The
relief
has
been
sized
to
more
than
accommodate the maximum flow, of the HP
system.
