Specifications
7
THEORY OF OPERATION
17
General
The various liquid cylinders of the Dura-Cyl/Cryo-Cyl
S
eries have the same general operating characteris-
tics. Each model of liquid cylinder has the ability to be
filled with a cryogenic product, build pressure inside
the vessel, and deliver either liquid or gas for a spe-
cific application.
The following section will discuss the theory behind
these operations. Later sections (section 8 thru 13)
will give a step by step procedure for the operation on
each specific models of liquid cylinder.
Liquid cylinder operation is done completely with the
control valves located on the top of the tank. The
valves are labeled and color coded for easy identifi-
c
ation: Fill/Liquid Valve – blue; Gas Use Valve –
green; Vent Valve – silver; Pressure Building Valve
– green.
The schematic, illustrations and table (figure M) show
how the plumbing circuitry operates for the four ma-
jor models of liquid cylinders. It is important that the
operators be familiar with the plumbing control valves
and there functions.
VAPORIZER
PRESSURE
BUILDING
COIL
PRESSURE
BUILDING
COIL
PRESSURE
BUILDING
COIL
5
7
2
6
8
9
4
2
6
8
5
3
9
4
2
6
8
5
1
Cryo-Cyl LP Cryo-Cyl LP/
with PB Option
Dura-Cyl MP/HP Cryo-Cyl 80HP
3
2
4
1
6 8
9
9
%
&
,
)15)$
.)42/'%.
0
2
%
3
3
5
2
%
%
&
,)15)$
.)42/'%.
Item Plumbing Controls and Function
1. Gas Use Valve – Used for gas with-
d
rawal.
2. Fill / Liquid Valve – Used for filling or
l
iquid withdrawal operations.
3.
Pressure Control Valve – Used to iso-
late (on/off) the pressure control
regulator.
4.
Vent Valve – Used to vent pressure.
5.
Pressure Control Manifold– Used to
automatically maintain pressure .
6.
Pressure Gauge – Indicates cylinder
pressure.
7.
Combination Regulator MCR– Used
to automatically maintain pressure.
8.
Pressure Relief Valve –
Used to limit
pressure in the liquid cylinders.
9. Liquid Level Gauge – Used to approx-
imate the liquid contents of the liquid
cylinder.
Dura-Cyl MP/HP Series
Dura-Cyl MCR MP/HP Series
Figure M
Dura-Cyl/Cryo-Cyl Series