VALVE OPERATION
WARNING
• DO NOT actuate or operate the Series 725S Diverter Valve
with media in the system, or while the valve is pressurized. To
prevent permanent damage to internal valve components, the
system must be depressurized, flushed, and free of backfill
before attempting to index the valve.
Failure to follow these instructions may cause valve damage,
resulting in serious personal injury and property damage.
DIVERSION SERVICE
For a directional change of backfill flow to stopes, complete the
following steps.
1.
Shut down backfill pump/gravity feed system.
2.
Flush piping system with clean water to remove build up on pipes
and valve.
3.
Once flushing is complete, rotate the diverter plug from outlet
“A” to outlet “B”. (Refer to the “Series 725S Helpful Information”
table for actuation input requirements. Also, refer to the actuation
manufacturer’s manual provided with the valve.)
Alternatively, follow the method shown in the “Flush Service”
section of these instructions.
4.
At operator’s option, flush the system prior introducing backfill
to identify and clear flow path blockages as well as providing
confirmation the backfill will be transported to the desired location.
CAUTION
• The Series 725S Diverter Valve should only be used when the
diverting plug is fully aligned with either outlet port. The valve
should never be used in a partially open position, or with the
diverting plug rotated 90 degrees in an attempt to shut off flow.
Failure to follow these instructions will cause premature valve
wear and leakage, resulting in property damage and voiding any
Victaulic warranty.
5.
Resume backfill operation.
FLUSH SERVICE
When using one outlet for backfill service and one outlet for flush water
dump to a sump collection area, complete the following steps.
1.
Shut down backfill pump/gravity feed system.
2.
Flush piping system with clean water to remove build up on pipes
and valve.
3.
Operate the valve from backfill service direction to the opposing
port, allowing the flush water to enter a sump collection area.
(Refer to the “Series 725S Helpful Information” table for actuation
input requirements. Also, refer to the actuation manufacturer’s
manual provided with the valve.)
CAUTION
• The Series 725S Diverter Valve should only be used when the
diverting plug is fully aligned with either outlet port. The valve
should never be used in a partially open position, or with the
diverting plug rotated 90 degrees in an attempt to shut off flow.
Failure to follow these instructions will cause premature valve
wear and leakage, resulting in property damage and voiding any
Victaulic warranty.
4.
Once flushing is complete, return valve to backfill service location
and resume backfill operation.
DUMP SERVICE
To evacuate backfill from the borehole and piping upstream of the valve
in the event of a system blockage downstream of the valve, complete
the following steps.
1.
Shut down backfill pump/gravity feed system.
2.
Operate the valve from the backfill service direction to the
opposing port, allowing upstream backfill to flow to a safe
disposal area. (Refer to the “Series 725S Helpful Information”
table for actuation input requirements. Also, refer to the actuation
manufacturer’s manual provided with the valve.)
3.
Flush remaining backfill from the upstream borehole piping with
clean water to remove build up on pipes and valves.
To recondition the valve for service after a dump event, complete the
following steps.
4a.
If rotating the diverter plug back to the backfill blockage side, only
do so when clean flush water remains in the valve. Do not attempt
to rotate the diverter back while dry. After downstream blockage
is cleared, rotate the diverter plug through several full cycles with
low pressure water inside the valve to clear any internal debris that
may have accumulated during the dump event.
CAUTION
• After using the Victaulic Series 725S Diverter Valve to dump
upstream backfill due to a downstream blockage, the diverter
plug may be rotated back to the original position only with clean
flush water remaining in the valve. Rotating the valve while dry
will result in damage to seals and excessive operating torque.
Failure to follow these instructions will cause premature valve
wear and leakage, resulting in property damage and voiding any
Victaulic warranty.
4b.
If the backfill has solidified in the downstream piping, the
diverter valve must be visually inspected to verify that there is no
solidified backfill in the outlet where the blockage occurred. This
will require removal of the coupling at the outlet port where the
blockage occurred, and may require removal of the entire valve
from the system. Any debris must be fully removed, and the valve
must be flushed with water prior to returning the valve to service.
5.
Resume backfill operation only after the valve has been thoroughly
cleaned and inspected.
I-725S
INSTALLATION AND OPERATING INSTRUCTIONS
Series 725S Diverter Valve
For complete contact information, visit victaulic.com
I-725S 11665 REV B UPDATED 05/2019 Z000725S00
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