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© ⅯⅯⅩⅢ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130318002
Chapter 7 - SuperFlow® 350 Demand Regulator
Kirby Morgan
®
37SS
the bias springs and removes unnecessary preasure
on the inlet valve seat. This will prolong the life of
both the inlet valve, seat, and bias springs.
1) Rotate the regulator adjustment knob in, towards
the regulator body.
2) Ensure the supply pressure is connected and prop
-
erly adjusted to 135 to 150 p.s.i.g.
3) Turn on the gas supply.
4) Rotate the adjustment knob out counterclockwise
slowly, until a slight steady flow develops.
5) Slowly rotate the adjustment knob in clockwise,
until the free flow stops. Lightly depress the purge
button several times and ensure the gas flow has
stopped.
6) Lightly depress the purge button. There should be
between
1/16
" and
1/8
" free travel in the button before
gas flow starts. When the button is fully depressed,
a strong surge of gas must be heard.
7) If the purge button travels less than
1/16
" or greater
than
1/8
" before free flow is heard, the demand regu
-
lator requires internal adjustment, per this chapter.
7.8.3 Inspection of SuperFlow
®
350
Regulator Body Interior
Tools Required:
¼ inch Flat Blade Attachment on Torque Screwdriver
1) Remove the demand regulator clamp by removing
the clamp screw.
Remove the demand regulator clamp.
2) Lift off the regulator cover and diaphragm.
3) Clean the diaphragm with the soapy solution, per
Chapter 6 and wipe dry. Inspect the diaphragm for
holes, tears or any signs of deterioration by hold
-
ing it up to a white light and stretching and pulling.
Check for a good bond between the metal disc and
the silicone. Replace diaphragm if any doubt exists.
B
WARNING
Use only replacement diaphragms
manufactured by Kirby Morgan. Use
of other diaphragms may degrade
performance and may cause in-
creased breathing resistance. This
can lead to fatigue and the inability to
work at full capacity.
4) Inspect the interior of the demand regulator body
for damage, corrosion and cleanliness. Clean the inte
-
rior of the regulator body if necessary per Chapter 6.
6) Reinstall the diaphragm, cover, and clamp. Tighten
the clamp screw to the recommended torque to 12
inch pounds using a torque screwdriver.
NOTE: Older regulator clamps, when properly
torqued, had a gap of approximately
1/32
" to
1/16
"
between the retaining clamp surfaces when fully
tightened. All new clamps when properly torqued,
have little or no gap between the retaining clamp
surfaces.
7.8.4 SuperFlow
®
350 Demand Regulator
Bias Adjustment Servicing, Demand
Regulator on the Helmet
Note: This procedure should be used when replac-
ing the O-ring on the adjustment shaft and or
cleaning and lubricating the shaft threads during
field repairs of the demand regulator on the helmet.
Start at the adjustment knob end of the regulator:
Tools Required:
3/4
inch Open-end Wrench Attachment on Torque
Wrench
3/32
inch Punch & Small Block of Wood
Ball-Peen Hammer
Regulator Adjustment Tool Kit, Part #525-620
Torque Wrench
1) Unscrew the regulator adjustment knob until it
stops. If the knob wobbles as you turn it, or is ex
-
