DRESSER RB 4700 Inbetriebnahmeanleitung Seite 31

Resetting of the shut-off valve
The shut-off valve must be reset only after having verify-
ing the reason for the intervention and after having re-
established normal conditions of work, proceeding as
follows:
Resetting of the shut-off valve with screw reset
– close the downstream stop valve
– remove the cover 29, unscrewing it (figa)
Fig a
Fig c
– screw it upside down into the stem 28 until in comes
into contact with the cover (figb)
– continue to screw it slowly: with this operation (by-
pass) pressure fills the downstream pipe part
– pull the cover outwards in order to permit the seating
of the balls on the stem: the shut-off valve is reset
(figc)
After these operations, screw the cover to it is housing
(figd) and slowly open the downstream valve
Shut-off valve with lever reset (SSV 8600)
Fig b
Fig d
31