Table of contents
1
Introduction ................................................................................................................................................
2
Intended use ...............................................................................................................................................
3
4
Marking of the valve...................................................................................................................................
5
Safety instructions .....................................................................................................................................
5.1
General precaution...............................................................................................................................
5.2
5.3
Special hazards....................................................................................................................................
6
Transport and storage ............................................................................................................................... 10
7
Installation .................................................................................................................................................. 11
7.1
General notes....................................................................................................................................... 11
7.2
Installation preparations ....................................................................................................................... 12
7.3
Installation steps .................................................................................................................................. 13
8
9
Initial start-up.............................................................................................................................................. 16
10 Normal operation........................................................................................................................................ 18
11 Maintenance................................................................................................................................................ 19
12 Troubleshooting help................................................................................................................................. 21
14 Further information .................................................................................................................................... 24
15 Know How ................................................................................................................................................... 24
15.1 Function ............................................................................................................................................... 24
15.6 Flow velocity......................................................................................................................................... 25
15.7 Sense line (control line)........................................................................................................................ 25
15.8 Protecting your system......................................................................................................................... 25
15.10 Valve seat leakage............................................................................................................................... 26
15.11 Cut-off .................................................................................................................................................. 26
15.12 Stellited seat and cone......................................................................................................................... 26
15.13 Leakage line......................................................................................................................................... 26
15.14 Mounting position ................................................................................................................................. 26
15.15 Start-up ................................................................................................................................................ 26
15.16 Steam operation................................................................................................................................... 26
UV-4.X.23.2 Stand 16.08.2023
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EN
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