CHART Cryo-Cyl80HP, Руководство по эксплуатации продукта

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27 Product Manual - Liquid Cylinders
General
This section contains information regarding the liquid
cylinder care and maintenance, troubleshooting and repair. It
includes the particular maintenance procedures for changes
to the operating pressure, service pressure and liquid service
changes. When performing a procedure that is described in
this section, refer to the Specifications section for component
item numbers and locations
O
2
Cleaning
Always keep cylinders clean and free from grease and oil.
This applies not only to containers used in oxygen service,
but also to those used in nitrogen and argon service
When repairing containers, use only parts which are
considered compatible with liquid oxygen and which
have been properly cleaned for oxygen service (refer to
CGA Pamphlet G.4.1 “Equipment Cleaned for Oxygen
Service”). Do not use regulators, fittings, or hoses which
were previously used in a compressed air service. Use only
oxygen compatible sealants or Teflon tape on the threaded
fittings. All new joints should be leak tested with an oxygen
compatible leak test solution.
Caution! Before conducting maintenance
or replacing parts on a cylinder,
release container pressure in
a safe manner. Replacement of
certain parts may also require
that the tank contents be
completely emptied.
Changing Service
The Dura-Cyl
®
and Cryo-Cyl
®
Liquid Cylinders are designed
to hold any of the gas products specified in the Operations
section of this manual. They can easily be modified to work
as well with nitrogen as oxygen. The fittings and decals need
to be changed and the inner vessel needs to be purged.
If a cylinder is changed from inert (argon or nitrogen) to
CO
2
service, the relief valve must be changed to a CO
2
relief
valve
Maintenance
Warning! Cylinders used in oxygen
service must not be changed to
CO
2
service.
Warning! Once a cylinder is used in CO
2
service, it cannot be used for
other gas products, especially
oxygen or nitrous oxide.
Warning! Whenever converting a nitrogen
or argon cylinder to oxygen use,
inspect the cylinder to assure
cleanliness.
Recommended Inner Vessel Purging
(with a vacuum pump)
Before any operation that involves pressure or handling of
cryogenic fluid, make sure that all safety precautions are
taken
1
Open the vent to remove any pressure that has built in
the inner vessel
2
Open the pressure building valve to boil away any
cryogenic liquid that remains in the vessel
3 Warm the inner vessel with warm nitrogen gas through
the liquid valve. Check the gas temperature as it escapes
through the open vent valve. Continue until it is warm.
4
Close the liquid valve, gas use and pressure building
valves
5
Attach a vacuum pump to the vent valve and evacuate
the inner vessel to 26 inches of mercury
6
Break the vacuum to 5 psig (0.3 barg) with high purity
gas as required by the service of the container
7
Repeat steps 5 and 6 twice.
8
Close all valves and remove the vacuum and gas purge
lines. The container is now ready for filling.