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Checking for leaks/evacuating/rinsing
Perform a leak test before every combustion! Check
the decomposition vessel to make certain there are
no leaks after all maintenance tasks and every time
after
the
cover
and
discharge
valve
are
disassembled!
Observe the safety instructions!
You can fill the decomposition vessel with oxygen and place it in
a container with water. A significant formation of bubbles may be
noted where there are leaks.
This test does not replace the pressure test!
•
Screw the pressure hose, included with deliver, onto the
nipple on the decomposition vessel with the M8x1 connec-
tion nut.
•
Connect the pressure hose onto your laboratory-side oxygen
supplyCheck the preset pressure on the pressure reducer,
max. 40 bar!
•
Open the oxygen supply line and wait for just a minute until
the pressure has equalised.
•
Place the decomposition vessel in a container filled with wa-
ter.
Watch for formation of bubbles!
If bubbles start to rise, there are leaks in the de-
composition vessel! Release the pressure on the
vessel and check for leaks! Never use a leaky pres-
sure decomposition vessel in the calorimeter!
•
Close the oxygen supply and loose the O
pressure hose (Pos.
2
1045).
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•
Remove and dry the decomposition vessel. Release it with
the threaded ring. The decomposition vessel could also
be evacuated up to a pressure of 50 mbar.
•
Screw the threated ring (Item 1045) on the bottom part of
the decomposition vessel until the limit. Open the discharge
valve by that way!
•
Adapt the vakuum hose of your vacuum pump onto the
nipple on the decomposition vessel and evacuate it.
•
Remove the threated ring and close the discharge valve in
that way.
Important notice: Don't place the evacuated decomposition
vessel on the bottom at the raised valve mandrel! Because
of the low pressure inside the vessel, the own weight is
sufficient to open the valve.
The O
pressure hose, included with delivery, is designed for
2
a pressure of max. 40 bar. It is 2 meters long and the smallest
permissible bending radius is 80 mm. The C 29 reducing valve
(accessory) is suitable for connecting the O
pressure hose to the
2
oxygen supply. It is equipped with an R1/4-inch threading for
connecting the hose. An appropriate adapter is included with the
O
pressure hose for use with pressure reducers commonly found
2
in the USA of connection size 1/4NPT.
You can also rinse the decomposition vessel in this manner with
oxygen, nitrogen or a noble gas.
To do this, adjust the system pressure on the laboratory side to
6-8 bar and place the cover of the decomposition vessel on the
bottom part. Do not screw it shut. In this manner the gas that is
forced in can dissipate through the threading again! After the gas
rinsing, close the supply valve again and the screw the cover shut.
Technical data
Maximum operating pressure
bar
1200
Test pressure
bar
2500
Maximum operating tem-
°C
50
perature
Combustion chamber volume
ml
25
Valve
Plate valve, self closing
Material in contact with the
1.4980; 1.4571
product
Weight
kg
2,3
Dimensions (d x H)
mm
60 x 150
Technische Änderungen vorbehalten!
Plate valve, self closing
The individual parts of the
decomposition
vessel
are
unambiguously identified by
the engraved serial number and
technical data.
Pressurebearing individual parts
of
different
decomposition
vessels
(cover
nut,
cover,
bottom part, discharge valve)
must not be exchanged among
each other! If any one of the
parts named above is damaged,
the entire decomposition vessel
must be sent in to the factory
for testing.
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