9.3.6 ADJUSTMENT OF THE LOWER ADJUSTING RING
• Take off the lower adjusting ring screw (22).
• Raise the lower adjusting ring until it is in contact with the disc holder (56). Do not apply any effort
so that compressing compression of the spring may be avoided.
• Then, lower the ring by the number of notches shown in the table below:
•
Move the lower adjusting ring screw (22) again checking that the pin is between 2 notches. It must
prevent the lower adjusting ring (7) from turning but it must not rest on it. The ring must be able to
move slightly in between the two notches in a hinged motion. The fitting and the motion should be
checked manually.
• For any technical informations refer to paragraph 10.2.2.
9.3.7 ADJUSTMENT OF THE UPPER ADJUSTING RING
The lower face of the adjusting ring should be aligned with the face of the disc holder (56) as first initial
adjustment if no mark has been taken.
Should any ‘fine’ adjustment of the upper adjusting ring be necessary whereby the blowdown setting should
need more accuracy. The additional procedures which are shown below should be observed. The upper
adjusting ring may be adjusted only if the adjustments of the overlap ring and the lower adjusting ring prove
to be unsatisfactory. Our experience shows that the only necessary adjustment of the upper adjusting ring
is on low pressure applications. Its position should not be changed before the correct blowdown has been
attempted by changing the position of the overlap ring and the lower adjusting ring.
If ‘fine’ adjustment is to be considered then proceed as follows:
• To reduce blowdown the upper adjusting ring shall be raised.
• To increase blowdown the upper adjusting ring shall be lowered.
The upper adjusting ring shall be turned by a quarter turn at each adjustment depending on the existing
blowdown.
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STARFLOW V
™
PRESSURE RELIEF VALVE
SARASIN-RSBD
™
