Shield SD-DVH5 Manual

DELUGE VALVE
MODEL: SD-DVH5
TECHNICAL DATA
NORMAL SIZE
MATERIAL
SEVICE PRESSURE
THREADED OPENING
MOUNTING
FACTORY HYDOSTATIC
TEST PRESSURE
FLANGE CONNECTION
WET PILOT SPRINKLER
HEIGHT LIMITATION
NET WEIGHT
WIHTOUT TRIM
FINISH
ORDERING
INFORMATION
DESCRIPTION
Deluge Valve is known as a system control valve in a deluge sys-
tem, used for fast application of water in a spray system. Deluge
valve protects areas such as power transformer installation, stor-
age tank, conveyor protection and other industrial application etc.
With the addition of foaming agent deluge valve can be used to
protect aircraft hanger and inflammable liquid fire.
VALVE OPERATION
SHIELD Deluge valve is a quick release, hydraulically operated
diaphragm valve. It has three chambers, isolated from each other
by the diaphragm operated clapper and seat seal. While in SET
position, water pressure is transmitted through an external by-
112
200,150,100, 80, 50 NB
Nickel Aluminium Bronze
1.4 to 17.5 Bar
(20 to 250 PSI)
BSPT
Vertical or Horizontal
35 Kg/sq.cm. (500 PSI)
ANSI B 16.5 # 150 FF
As per graph in the catalogue
200 NB - 154 Kg
150 NB - 82 Kg
100 NB - 55 Kg
80 NB - 36 Kg
50 NB - 31 Kg
RAL 3000
1. Size of Valve
2. Flange specification
3. Valve trim vertical
or horizontal
4. Trim type
pass check valve and restriction orifice from the
system supply side to the top chamber, so that
supply pressure in the top chamber act across the
diaphragm operated clapper which holds the seat
against the inlet supply pressure because of the
differential pressure design. On detection of fire the
top chamber is vented to atmosphere through the
outlet port via opened actuation devices.
The top chamber pressure cannot be replenished
through the restricted inlet port, and the upward
force of the supply pressure lifts the clapper allow-
ing the water flow to the system piping network and
alarm devices.
TRIM DESCRIPTION
The trims are functionally termed as Dry Pilot Trim,
Wet Pilot Trim, Electric Trim and Test and Alarm
Trim as per the method of actuation of the deluge
valve. The functionality of these trims is described
below.
a) DRy PILOT TRIM (PNEUMATIC RELEASE)
Dry pilot operation uses a pilot line of closed Sprin-
kles/QB detectors containing air under pressure,
located in the area to be protected. It requires reg-
ulated dry air supply with main supply point through
restricted orifice. The air pressure to be maintained
as specified in the catalogue of Dry Pilot Actuator.
The pilot line is connected to air inlet side of actua-
tor. The top chamber of the deluge valve is con-
nected to water inlet side of actuator.
When there is an air pressure drop, or due to re-
lease of any of the release device on detection of
fire, the diaphragm of actuator is lifted and allows
the water to drain. This releases the water pressure
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