Specifications

16
SERVICE AND MAINTENANCE
61
For Dura-Cyl with LCCM Pressure Control
Manifold in Gas Service (Refer to Figure AA)
1. Close all four manual valves on the Dura-Cyl .
2. Back out adjusting knob (Item A) on pressure
control manifold.
3. Release pressure in the container by opening
the vent valve. (The container must be at least
1/2 full)
4. Close vent valve and turn the adjusting knob
(Item A) until the knob registers a desired pres-
sure setting.
5. With liquid in the container, open the pressure
building valve (Item B) and observe the pressure
gauge until it stops rising. The gauge will then
indicate the pressure control manifold setting.
6. Turn the pressure control manifold knob (Item A)
clockwise to increase the pressure. The pressure
gauge will stop rising at the new regulator setting.
7. Continue adjusting the regulator until the desired
pressure has been reached.
For Dura-Cyl/Cryo-Cyl in Liquid Service
When a container is dedicated to a liquid dispensing
service, change the operating pressure as follows.
1. Release pressure in the container by opening
the vent valve.
2. Isolate the pressure control regulator by turning
off the pressure builder valve. The heat leak of
the liquid cylinder will be enough to maintain
the pressure at 22 psig (1.5 BAR).
3. Replace standard pressure relief valve with one
to maintain the desired operation pressure (22
psig is normal). Use an oxygen compatible liq-
uid thread sealant (or Teflon tape) to prevent
leaking.
4
. Pressure test all new joints using an oxygen
compatible leak test solution.
Installing the LCCM (Dura- Cyl Only)
1. Install the four screws and washers into the
manifold. (Figure BB)
2. Apply a thin layer of Halocarbon™ grease to
each side of each ferrule, and to the threaded
end of the four screws.
3. Install the gasket on the end of the manifold.
4. Place the manifold on the knuckle of the liquid
cylinder, with the screws lined up with the
tapped holes. Use your fingers on a 5/32” hex
key to start the four screws.
5. Tighten all screws “finger tight.”
6. Referring to figure BB for the proper torque se-
quence, torque each screw to 50 in. lbs.
7. Using the same sequence, torque each screw
to 70 in. lbs.
A
B
P
R
E
S
S
U R
E
B
U
I
L
D
E
R
320
240
280
Figure AA
DURA-CYL
0
2
%
3
3
5
2
%



Figure BB
Small Diameter Tube
Large Diameter
Tubes
LCCM Regulator
Torque
Sequence