26
Positive pressure lung demand valve with
medium pressure coupling
Preparing the test device
Necessary accessories:
— Test piece PE (R 51 591)
— Test piece P (R 50 028)
— ESA adaptor (AG 02 406)
Detach the test head.
Connect the medium pressure
hose of the lung demand
valve (1).
The plug-in coupling must
engage.
Switch off the positive pres-
sure function at the lung demand valve.
Open the compressed air supply.
Connect the lung demand valve with the test piece/
adaptor
to the round thread connection (2).
Activate the measuring point
"Round thread connection" (3).
Check for leaks
Set the test time
1)
(1).
Generate a test pressure
1)
:
Briefly pull the joystick for fine
adjustment forwards several
times (2).
The pressure is displayed on
the low pressure manometer (3).
Start the timer (1).
Read the pressure at the end of the test time and com-
pare the pressure difference with the target value
1)
.
Testing the switching pressure and static positive
pressure
Briefly activate the joystick
several times and slowly
increase the negative pressure
(1).
Read the negative pressure (2)
and compare with the target
value
1)
.
Read the static positive pressure (2) and compare with
the target value
1)
.
Testing the metering valve
Set the test time
1)
(1).
Generate the test pressure
1)
.
Start the timer (1).
Read the pressure at the end
of the test time and compare
the pressure difference with
the target value
1)
.
1) Refer to the Instructions for Use of the lung demand valve.
01
12
10
75.eps
2
1
3
02921075.eps
1
2
3
03521075.eps
1
2
04121075.eps
1
2
Ending the test
Depressurize the line system.
Remove the test assembly.
