Specifications

5
INTRODUCTION
9
over pressurization by a bursting disc that acts as a
secondary relief device. These devices meet the
requirements of CGA Pamphlet S-1.1 “Pressure
Relief Device Standard — Part 1 — Cylinders For
Compressed Gases.”
A back control regulator is used to build and maintain
operator pressure while assuring a no-loss operation
under normal usage during gas withdrawal service.
The no loss portion of the regulator (referred to as the
economizer) allows gas withdrawal directly from the
vapor space of the cylinder until liquid cylinder head
pressure is reduced to the normal operating range.
This important feature is useful whenever a liquid
cylinder has been inactive for a period of several days
or whenever normal heat leak may have created an
increase in head pressure.
For precise regulation of the outlet gas, add a final line
gas regulator at the gas use connection. The operating
pressure can be increased to the pressure control
valve setting (if necessary) by changing the regulator.
These Chart liquid cylinders provide a complete self-
contained liquid or gas supply system for industrial,
laboratory, or hospital use.
0ROTECTION
2ING
(ANDLING
3LOT
(ANDLING
0OST
/UTER
6ACUUM
*ACKET
&OOT
2ING
)NNER
0RESSURE
6ESSEL
-ULTI 
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)NSULATION
,IQUID ,EVEL
'AUGE
0LUMBING
#ONTROLS
6ACUUM
3PACE
3AFETY 2ELIEF
$EVICES
0UMPOUT
Figure D
Figure E