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Kirby Morgan 37 & 57
© Copyright 1970-2008 Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 080508001
7.7.11 SuperFlow 350 Regulator Steady
Flows When Pressured Up: Special Tools
Used
Tools Required:
Small flat blade screw driver.
Small jewelers screw driver or metal scribe.
Needle nose pliers.
KMDSI regulator tool kit if available.
A few words about the demand regulator: The de-
mand regulator is rugged and reliable. However, to
maintain optimum performance it should be checked
prior to each diving day in accordance with the brief
procedure Demand Regulator Test for Correct
Adjustment, Fully Assembled.
If after completing the demand regulator test as
outlined in this chapter, adjustment is necessary and
the special KMDSI tool kit is not available proceed
as follows:
1) Remove the regulator clamp, cover and dia-
phragm.
2) Adjust the regulator adjustment knob all the way
in. Finger tight only.
3) Pressurize the regulator to between 120-150 p.s.i.g.
(8.5-10 bar).
4) If the regulator is not free flowing, slowly back out
on the adjustment knob until a slight free flow is heard
and then rotate the adjustment knob in (clockwise)
1/4 turn and depress the purge button momentarily.
Repeat this procedure until the gas flow stops.
Usually at this point the regulator adjustment knob
will be between 5 and 7 turns out. Note: If when
backing the adjustment knob out from the full “in”
position, the regulator starts free flowing at less
than five turns, then this usually indicates insuf-
ficient free play at the lever.
There are several issues that could cause the regulator
to free flow, even when the adjustment knob is turned
all the way in. These are as follows:
A) The regulator was rebuilt and the adjustment
nut is too tight. If this is the case, the nut must be
loosened.
B) The washer was never removed from the regu-
lator and a second one has accidentally been in-
stalled. If this is the case, the second washer must
be removed.
C) The regulator body has never been properly ser-
viced and there is corrosion inside the body, making
proper inlet valve travel impossible.
5) Check the free play at the lever. The lever should
have between 1/16-1/8 inch (1.5-3.0 mm) play. If
adjustment is necessary, adjust using the KMDSI
tools.
6) KMDSI tools: Using the inlet valve holding rod,
(L shaped rod), insert the end of the rod into the bal-
ance hole. Lightly apply force by pushing on the rod
making it act as a lever to put friction against the
inlet valve shaft. At this point, the KMDSI wrench
can be used to rotate the lever nut . Rotate the nut “In”
(clockwise) to reduce lever play or “Out” (counter
clockwise) to increase lever play.
Only rotate the nut 1/8 turn at a time. Remove the
tools and depress the lever several times after adjust-
ing to ensure the correct play is achieved. It may be
necessary to repeat this procedure several times, as
the method requires estimating the correct position of
the nut. Note: if there is little (less than 1/16 inch /1.5
mm) or no lever play, the regulator will free flow. If
there is too much free play, (more than 1/8 inch / 3.0
mm) the regulator will not be capable of full demand
flow potential.
The nut must not be loosened more than
1/8 turn to lower the height of the lever. If
more adjustment is necessary the lever
should be bent downward. If the nut is
loosened more than 1/8 turn the lever
will not have enough travel for proper
flow rates.
CAUTION
The lock nut must always be replaced if
removed from the inlet valve. The plastic
material that locks the nut is not designed
for multiple reuse. If the nut comes loose
during a dive the regulator would free
flow heavily. In the situation where the
diver is using bottled breathing gas this
would result in a rapid consumption of
breathing gas.
WARNING
7) If the free flow did not stop after this procedure,
refer to regulator disassembly and cleaning proce-
dures.