Publicité
Resetting of the shut-off valve
The shut-off valve must be reset only after having
verifying 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 c
Fig a
– 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
Fig b
Fig d
35
Publicité
