3. Install new fittings for the USE, VENT and LIQUID connections form the Gas Service
Change Kit. Leak test the fittings you just replaced, and change the gas service de-
cals to complete the conversion.
GAS SERVICE CHANGE KITS
Kit
Valve
Connection
Part No.
Gas Service
Name
Designation
GL50-8C35
Oxygen
LIQUID
CGA 440
VENT
CGA 440
USE
CGA 540
GL50-8C30
Inert
LIQUID
CGA 295
(nitrogen
VENT
CGA 295
or argon)
USE
CGA 580
HP50-8C30
Carbon Dioxide
LIQUID
CGA 320
VENT
CGA 295
USE
CGA 320
HP50-8C35
Nitrous Oxide
LIQUID
CGA 326
VENT
CGA 295
USE
CGA 326
REGULATOR MAINTENANCE
A dual stage, spring loaded regulator is employed for the pressure building/economizer
circuit. This regulator can be adjusted on the container, replaced, or checked and ad-
justed off the container in a readily fabricated bench adjustment fixture.
Regulator Adjustment – On Container
1. Fill the container with the appropriate liquid product.
2. Open the Pressure Building Valve and allow the container pressure to stabilize for
about an hour. Note the point where the pressure stabilizes.
3. Adjust the screw on the top of the regulator to raise of lower the pressure to the desired
point. When decreasing the setting, the pressure building valve must be closed and
the container vented to a lower pressure. Then repeat step 2 to observe the change.
REGULATOR ADJUSTMENT RANGES
Part No.
Normal Setting
Range
6999-9018
300 psig
200 to 350 psig
20.7 bar
13.8 to 24.1 bar
2068 kPa
1379 to 2413 kPa
6999-9015
125 psig
75 to 175 psig
8.6 bar
5 to 12 bar
862 kPa
517 to 1207 kPa
CAUTION:
When changing gas
service, install proper
fittings – DO NOT use
adapters. The following
procedure address the
physical changes to the
container only. For
detailed procedures on
the decontamination of
the container, itself, refer
to CGA pamphlet C-10
“Changes of Service for
Cylinders Including
Procedures For
Inspections and
Contaminant Removal.”
CAUTION:
Carbon dioxide and
Nitrous Oxide may
contain contaminants
such as hydrocarbons,
that are not easily
removed from cylinders,
an associated
components by
conventional oxygen
service cleaning
procedures. Once a
cylinder is placed into
CO
2
or N
2
O gas service,
it should never be
converted to another gas
service. See CGA
pamphlet C-10 for proper
procedures.
NOTE:
One clockwise turn of
the adjustment will raise
the setpoint by
approximately 30 psig (2
bar/207 kPa). See the
chart below to
determine the range of
adjustment for the
regulator you are
servicing. Do not attempt
to set the regulator to a
pressure outside of its
design range.
