Specifications

16
SERVICE AND MAINTENANCE
62
Bench Setting a Pressure Control Regulator For
The CRYO-CYL
1. Connect the pressure control regulator to a nitrogen
pressure source as shown in figure CC.
2. Connect economizer out port to tee on PB outside
of regulator with a piece of tubing.
3. Close valve B.
4. Open the pressure source valve (follow appro-
priate safety rules.)
5 Open valve C slowly.
6.
Pressure gauge A will indicate the pressure to
which the regulator has been set. The pressure
can be increased by turning the adjusting screw
in. The pressure may be decreased by turning
the screw out; however, after each adjustment
outward it will be necessary to open and then
close valve B to relieve excess pressure.
7.
This setting should match the calibrated scale. If
it does not go to step #8.
8. Loosen lock nut “D” and adjust screw “E” until
calibrated scale matches set pressure. When
completed, tighten locknut “D”. “D” and “E” are
only to be loosened or adjusted during bench
setting procedure.
Note: Factory Setting:
For Dura-Cyl MCR MP Series …………… 125 psig
For Cry
o
-Cyl HP Series ……
……………… 300 psi
Level Gauge
The liquid level gauge in the Cryo-Cyl LP model is a
f
loat and spring that approximates the amount of
product in the container. The design of this gauge
makes it possible to use the same float and spring for
nitrogen, oxygen and argon. However, the liquid level
decal must be changed for each product. The de-
cals are marked N for nitrogen, O for oxygen, and A
for argon.
If the gauge is malfunctioning it should be removed
from the container and repaired. The following proce-
dure should be followed: (See figure DD - page 63)
1. Open the vent valve and release any pressure
that is in the container.
2. Remove the nylon sight gauge protector (Item 3).
3. Unscrew and remove the sight gauge (Item 5).
4. Replace any damaged parts, stretched springs
or bent floats.
5. Adjust the sight gauge assembly as follows
a. Hold the sight gauge assembly allowing the
float to hang freely.
b. The top of the indicator's white tip should
be in the empty zone.
c. Loosen the spring retainer (Item 8) and adjust
the spring up and down the float rod until the
indicator hangs freely in the right location.
Tighten the spring retainer.
d. Replace the O-Ring/Gasket (Item 7).
e. Insert the float and sight gauge assembly
into the container. Make sure that it engages
in the float guide located approximately 21
inches into the container.
f. Tighten the sight gauge to 1/4 turn past hand
tight (150in/lb) and replace the protector.
WARNING: Remove all pressure from the Cryo-Cyl
before repairing the liquid level gauge.
Gloves
should be worn when handling the float rod to
prevent burns.
WARNING: DO NOT clean the plastic sight gauge
with solvent cleaners.
FLOW
Pressure
Source
V
alve
Regulator
Valve “C”
Valve “B”
Valve “A”
Figure CC
Relief
Valve
D
E
Do not loosen or adjust “D”
o
r ”
E”
except when bench
setting regulator.
P.B.
IN
P.B.
OUT
Bench Set Combo
R
egulator
Inverted View
Adjusting
Screw