Dungs FRM 100025 HD, Instruction Manual, Page: 136 / 174

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Edition 10.15 • No
. 270 442
6.0 Check of the upper shut-down pressure p
do
6.1 SBV installation on the outlet side: block the line
upstream of the SBV.
6.2 Check the upper trip pressure of the SSD:
create wind load on the outlet side (reduction in
pressure pulse)
6.3 Create a lockable connection between the inlet and
outlet side.
6.4 Conduct the inlet pressure in the bypass on the outlet
side through the long opening of the stop-cock.
6.5 Monitor the increase in pressure on the outlet side
on the pressure gauge.
6.6 Avoid inadmissible high pressure on the outlet
side stop applying pressure immediately after the
SSD has tripped.
6.7 Read the upper response pressure on the pressure
gauge on the outlet side and compare it with
the nominal value.
6.8 The determined triggering pressure must be
within the response tolerance (AG
o
) of the
nominal value.
6.9 If necessary, correct the response pressure according
to the specifications in section 11.2 and check it again.
7.0 Check of 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 Check if gas is available and release it safely in the
atmosphere.
7.3 Monitor pressure drop on the pressure gauge.
7.4 Unlock SSD.
7.5 Close the shut-off fitting on the input side.
7.6 Create the wind load: continue to safely release the
gas in the line on the outlet side into the atmosphere.
7.7 After trip the SSD: 6.7 Read the lower response
pressure on the pressure gauge on the outlet side
and compare it with the nominal value.
7.8 The determined trip pressure must be within
the response tolerance (AG
u
) of the nominal value.
7.9 Close the vent valve, remove the hose, insert the
sealing cap.
7.10 Slowly open the shut-off valve on the inlet side.
Pressure release in the test section
1
3
2
4
5
6
7
8
9
10
11
Creation of wind load
1
2
3
4
5
6
7
8
9
10
11