KST – KROMSCHRÖDER SYSTEM TECHNOLOGY
22.214.171.124 Individual manual shut-off valves for burners
For burners which are independently ignited, each individual burner shall be fitted with a manual shut-off valve.
The manual shut-off valve shall comply with EN 331. For valves outside the scope of EN 331, the safety requirements detailed in EN 331 shall be met at an equivalent level.
However if the installation of such a manual valve affects the mixing characteristics of mixing devices (e.g. venturi mixers), then the shut-off valve shall be installed upstream of any such device.
For multiple burners in which cross-ignition from burner to burner occurs by design the complete group of burners shall be fitted with at least one manual shut-off valve.
The following chapters are printed with the permission of the DIN Deutsches Institut für Normung e.V. (German Institute for Standardization). For the implementation of the DIN Standard, the version with the most recent issue date is deemed authoritative. This is available from Beuth Verlag GmbH, Burggrafenstrasse 6, 10787 Berlin, Germany.