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Dival SQD-1 - MT 234-E - 02-2020
EN
MAINTENANCE
8.0 8.0 FINAL
OPERATION
8.1
CHECKING THE TIGHTNESSES
1) Very slowly open the on/off valve upstream from the regulator and using a foam solution or the like check:
• the tightness of the external surfaces of the regulator;
• the tightness of the slam-shut;
• the tightness of the internal surfaces of the regulator;
• the tightness of the fitting.
2) Operating very slowly, pull the provided threaded bushing (7), off the slam-shut until only the internal by-pass
is opened. Pull completely to the re-engage position;
3) Check the tightness of the reinforced gasket of the regulator;
4) Open a bleed cock downstream from the regulator to create a small gas flow;
5) Turn the internal adjustment ring (318) until the desired set-point value is reached;
6) Close the bleed cock to the atmosphere.
8.2
START UP
1) Very slowly open the downstream on/off valve and, if necessary, ad just the regulator set-point by means of the
internal adjustment ring (318).
2) Set the tap (326) for normal control head.
