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Resetting of the shut-off valve with lever reset
(type SSV 8600)
– close the downstream stop valve
– slowly operate the resetting lever 27 clockwise
until the internal by-pass is open 26:
with this operation pressure fills the outlet cham-
ber 12, the control chamber 19 and the down-
stream pipe, checking on the manometer in-
stalled on the pipeline
Shut-off valve calibration
The shut-off valve is usually supplied with calibra-
tion values according to the order Should be nec-
essary to modify the calibration value, it must be
considered that the modification can be effected
only within the calibration range of the spring in-
stalled, otherwise it is necessary to substitute it with
a suitable spring to be selected referring to the
provided tables
– when the pressure indicated on the manometer
is stabilised, continue to move the lever 27 in
order to permit the connection of the control
lever 24; at this point the lever will remain stable
on the opening position
After these operations, the shut-off valve is into
operation and it is possible to proceed slowly with
the opening of the downstream valve
When the installed spring is appropriate to obtain
the required pressure, proceed as follows:
– over-pressure shut-off operation:
rotate in a clockwise direction the external screwing
ring increases the calibration value or in an anti-
clockwise direction to reduce it
– low-pressure shut-off operation:
rotate in a clockwise direction the central screwing
ring to increase the calibration value or in an anti-
clockwise direction to reduce it
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