Dungs 279042, Инструкция по эксплуатации, Страница: 39 / 72

38 … 72
MC • Edition 05.20 • Nº 279 663
39 … 72
6.0 Checking the upper shut-down pressure p
do
6.1 Assembly of the SBV on the outlet side:
Block the line upstream of the SBV.
6.2 Check the upper trip pressure of the SAV: create a
backpressure downstream.
6.3 Create a direct, lockable connection between the
inlet and outlet sides.
6.4 Conduct the inlet pressure to the outlet side by slowly
opening the stopcock in the bypass.
6.5 Monitor the pressure increase on the outlet side on
the pressure gauge.
6.6 Avoid an inadmissibly high pressure on the outlet
side: After triggering the SAV, close the bypass
immediately.
6.7 Read the upper locking pressure on the pressure
gauge on the outlet side and compare it with the
setpoint.
6.8 The determined activation pressure must lie within
the response tolerance (AG
o
) of the set-point.
6.9 If necessary, correct the response pressure accord -
ing the specifications under point 11.2 and check it
again.
7.0 Check the lower shut-down pressure p
du
7.1 Release the pressure in the test section on the outlet
side until the operating pressure is reached.
7.2 Release the gas in a controlled and safe manner into
the atmosphere.
7.3 Monitor the pressure drop on the pressure gauge.
7.4 Unlock the SAV.
7.5 Slowly close the shut-off valve on the inlet side.
7.6 Establish counter-pressure: Continue to release the
gas from the pipe on the outlet side outwards in a
controlled and safe manner.
7.7 After triggering the SAV: 6.7 Read the lower blocking
pressure on the pressure gauge on the outlet side
and compare it with the set point.
7.8 The determined activation pressure must lie within
the response tolerance (AG
u
) of the setpoint.
7.9 Close the drain cock, remove the hose and tighten
the closing plug.
7.10 Slowly open the shut-off valve on the inlet side.
1
3
2
4
5
6
7
8
9
10
11
Generate back-pressure
1
2
3
4
5
6
8
9
10
11
Release the pressure in the test section
7
only with external pulse
only with external pulse