MARCH, 2022
HD 235
PAGE 3 OF 16
HD FIRE PROTECT
PVT. LTD.
TRIM TYPES
The trims are designated as following:
W =Wet Pilot trim D = Dry Pilot Trim
a) Type ET-W and ET-D
This type of trim is basic trim required to
operate the deluge valve. A solenoid valve for
electric remote actuation and pressure switch
for sensing & annunciation are optional.
b) Type ETW-D and ETD-D
This trim type is a combination of components
of the ET trim along with the drip and drain
trim. A solenoid valve for electric remote actuation
and pressure switch for sensing & annunciation
are optional.
c) Type ETW-T and ETD-T
This trim type is a combination of components of
the ET trims along with the test & alarm trim.
A solenoid valve for electric remote actuation
and pressure switch for sensing & annunciation
are optional.
d) Type NT-W and NT-D
This trim type is a combination of components of
the ET trim along with the test and alarm trim
as well as the drip and drain trim. A solenoid valve
for electric remote actuation and pressure switch
for sensing & annunciation are optional.
RESETTING PROCEDURE
A. When priming connection is below the upstream
valve (Stop Valve)
(i) Close the upstream side stop valve provided below
the deluge valve to cease the flow of water.
(ii) Open both the drain valves/ drain plugs and close
when the flow of water has ceased.
(iii) Close the release device/replace the Sprinkler if
release was through Sprinkler/ QB Detector.
(iv) Inspect and restore/ replace/ repair if required,
the section of the detection system subjected to
“Fire condition”.
(v) In case of dry pilot detection system, open the
air supply valve to build-up air pressure. Open the
priming valve fully. When top chamber pressure is
more than 50% of the inlet pressure, open the
upstream side of the stop valve provided below
the Deluge valve. No water should flow into the
system.
(vi) When priming shut off valve (optional) is provided
for resetting, then the water need to be drained
from upstream side of valve.
B. When priming connection is from the inlet of
Deluge Valve (Auto resetting)
(i) The deluge valve will reset automatically when
releasing devices which were responsible for
deluge valve opening are closed or restored
back to their original status (i.e closing of ERS
or replacing the damaged Sprinkler if release
was through Sprinkler/ QB Detector or closing
of Solenoid valve). The reset time may be long or
cause vibration while closing depending upon the
system back pressure at the outlet of the valve.
CAUTION
(a) Do not close the priming valve, downstream and
upstream stop valves, while 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 limitation graph
(d) Do not connect the Sprinkler Alarm outlet drain
line to close a common drain as it may create
back pressure & 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 flow from all open system valves
(g) The responsibility of maintenance of the protection
system 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 4
o
C. Heat tracing is not
permitted.
(i) Deluge Valve must be used in pressurised system.
SYSTEM TESTING PROCEDURE
(i) Keep the upstream side of the stop valve partially
open. To avoid water flow 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 heading “RESETTING PROCEDURE FOR THE
DELUGE VALVE”
