CHART Cryo-Cyl80HP, Руководство по эксплуатации продукта

Страница: 14 / 62

8
Introduction Product Manual - Liquid Cylinders
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 liquid cylinders provide a complete self-contained
liquid or gas supply system for industrial, laboratory, or
hospital use.
Cylinder Identification / Safety
Devices
There are many different Dura-Cyl ® Liquid Cylinders
described in this manual. They vary in size, capacity,
pressure, gas service and various plumbing features. It is
important that these liquid cylinders can be easily identified.
The Cryo-Cyl ® Liquid Cylinders are available in 80 HP only
The following table shows each model by type and indicates
its capacity and pressure rating. The sight gauge protector
color is an easy way to determine the pressure rating of a
liquid cylinder
Model
Suffix
Model
Color
Service
Pressure
(psig)
Maximum
Relief
Valve
(psig)
Industry
Standard
Relief
Setting
(psig)
Maximum
Rupture
Disk
(psig)
LP Yellow 100 110 22 200
MP Blue 200 235 230 400
HP Orange 292 350 350 584
The data plate (Figure 2) is permanently attached to the
handling post of the liquid cylinder. The data plate shows the
serial number and pressure rating for that cylinder. Do not
remove or alter the data plate in any way.
Figure 2
One of the most important requirements in the 4L code is the
marking and calculation of the safety devices used to protect
the inner pressure vessel. Manufacturers use these guidelines
to design and select the appropriate safety devices based on
calculations derived from the Compressed Gas Association
(CGA) code, pamphlet S1.1 (CFR49 section 173.316). These
safety devices are marked and sized accordingly to meet
the minimum requirements for the capacity, liquid service
and maximum operating pressure of the liquid cylinder on
which they are installed. Confirming this requirement during
the procurement of replacement relief valves and rupture
disks from a reputable supplier will help ensure device
compliance.
Based on the liquid cylinder stamping data, calculating the
pressure settings on both of these safety devices is actually
relatively simple. On a DOT - 4L coded cylinder, you can
find the service pressure on the cylinder data plate. The
service pressure (psig) is noted directly after the DOT
marking: DOT - 4L SP This will be a three-digit numeric
value that dictates the design of the inner vessel thickness
and the maximum allowable operating pressure calculation
from the manufacturer
To calculate the maximum allowable operating pressure or
maximum relief valve setting, the following equation is used:
1 .25 x Service Pressure - 15 psi (for vacuum)
= Maximum Relief Valve
Safe Handling
This section describes and illustrates proper cylinder
handling procedures. Major considerations for liquid cylinder
handling are summarized as follows:
•
Dura-Cyl and Cryo-Cyl liquid cylinders should only be
moved by utilizing an appropriate cylinder cart, roller
base, or overhead hoist.
•
Do not roll a liquid cylinder by the handling ring
• Liquid cylinders should always be stored and operated in
a vertical position.
• Never lay, store, or ship a cylinder on its side.
• When loading (or unloading) a cylinder onto a truck,
use a power lift gate, crane, or an inclined ramp. Never
attempt to manually lift or slide a liquid cylinder on or off
of a truck bed
Dura-Cyl and Cryo-Cyl liquid cylinders can be safely
handled by using a cylinder cart, roller base, or an overhead
hoist. When moving the unit, keep the unit upright at all
times except for those instances when it is slightly tipped for
loading or unloading
Dura-Cyl and Cryo-Cyl liquid cylinders are durable and
designed to withstand common handling; however, abusing a
unit may damage the liquid cylinder to the extent that it must
be returned to the factory for repair.