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d) Type SH5-NTW and SH5-NTD
This trim type is a combination of components of normal
trim along with the test and alarm trim as well as the drip
and drain trim. A solenoid valve for electric remote actua-
tion and pressure switch for sensing & annunciation are
optional.
RESETTING PROCEDURE FOR THE
DELUGE VALVE
(i) Close the upstream side stop valve provided below the
deluge valve
ii) Open both the drain valves/ drain plugs and close when
the ow of water has ceased
(iii) Close the release device/replace the Sprinkler if re-
lease was through Sprinkler/QB Detector
iv) Inspect and release if required, or close the section of
the detection system subjected to “Fire condition”
(v) In case of dry pilot detection system, open the air sup-
ply valve to build-up air pressure. Open the priming valve
fully. Open the upstream side of the stop valve provided
below the Deluge valve. No water should ow into the sys-
tem.
vi) Where priming shut off valve (optional) is provided for
resetting, then the water need to be drained from up-
stream side of valve.
NOTE :
The valve can be reset without undergoing above proce-
dure, by just closing/replacing the release device as valve
is auto reset type. The reset time may be long or cause
vibration while closing depending on back pressure at the
outlet of the valve.
CAUTION
(a) Do not close the priming valve, downstream and up-
stream stop valves, while the system is in service.
(b) The releasing device must be maintained in the open
position, when actuated, to prevent the deluge valve from
closure if anti shut off valve is not provided.
(c) While using a Deluge valve in the wet pilot system the
height and the length of the wet pilot detection line is to
be limited as shown in the wet pilot sprinkler height limita-
tion graph.
(d) Do not connect the Sprinkler Alarm outlet drain line to
close a common drain as it may create back pressure and
Sprinkler Alarm may not function.
(e) Deluge valve must have support to absorb sudden
opening or closing vibration shock to the piping.
(f) To avoid water damage, take precautions when opening
the water supply main control valve, since water will ow
from all open system valves.
(g) The responsibility of maintenance of the protection sys-
tem and devices in proper operating condition lies with the
owner of the system.
(h) Deluge Valve & its trim shall be maintained at a minimum
temperature of 4ºC, Heat tracing is not permitted.
(i) Deluge Valve must be used in presssurised system
SYSTEM TESTING PROCEDURE
(i) Keep the upstream side of the stop valve partially open.
To avoid water ow to system side close the system side
stop valve. This valve is to be kept in open position after the
testing is completed.
(ii) Let any of the release devices to trip. This will result in
a sudden drop of water pressure in the deluge valve top
chamber which in turn will open the deluge valve. Close the
upstream side stop valve immediately.
(iii) Reset the valve as per the procedure given under head-
ing “RESETTING PROCEDURE FOR THE DELUGE VALVE”
INSPECTION AND MAINTENANCE
Installed system piping network must be ushed properly
before placing the Deluge valve in service.
A qualied and trained person must commission the sys-
tem. After few initial successful tests, an authorized person
must be trained to perform inspection and testing of the
system. It is recommended to have regular inspection and
test run of the system as per NFPA guideline or in accord-
ance to the organisation having local jurisdiction.
(i) WARNING
Inspection and testing is to be carried out only by author-
ised and trained personnel. DO NOT TURN OFF the water
supply or close any valve to make repair(s) or test the valve,
without placing a roving re patrol in the area covered by
the system. Also inform the local security personnel and
central alarm station, so that there is no false alarm signal.
It is recommended to carry out physical inspection of the
system at least twice in a week. The inspection should veri-
fy that all the control valves are in proper position as per the
system requirement and that there are no damages to any
component.
The frequency of inspections must be increased in the pres-
ence of contaminated water supplies, corrosive/ scaling
water supplies, and corrosive atmospheres.
