HD FIRE PROTECT H3, Руководство пользователя

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MARCH, 2022 HD 235 PAGE 2 OF 16
HD FIRE PROTECT
PVT. LTD.
TRIM DESCRIPTION
The trims are functionally termed as Dry Pilot Trim,
Wet Pilot Trim, Electric Trim and Test & Alarm Trim as
per the method of actuation of the deluge valve.
The functionality of these trims are described below:
a) DRY PILOT TRIM (PNEUMATIC RELEASE)
Dry pilot operation uses a pilot line of closed
Sprinklers/ QB Detectors containing air under
pressure, located in the area to be protected.
It requires regulated 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 (HD 252). The
pilot line is connected to air inlet side of actuator.
The top chamber of the deluge valve is connected
to water inlet side of actuator.
When there is an air pressure drop, or due to
release of any of the releasing device on detection
of fire, the diaphragm of actuator is lifted and
allows the water to drain. This releases the water
pressure in the top chamber of the deluge valve,
allowing the deluge valve to open and water to
flow into the system piping & alarm devices.
Recommended air supply pressure for dry pilot
trim system is 3.5 kg/sq.cm.
User must install non return valve at air supply
connection to deluge valve trim.
In dry pilot trim, an actuator (DPA) is provided.
An optional Pneumatic Reset Device (PRD) can
be provided, which acts as a manual reset device
in the dry pilot line.
b) WET PILOT TRIM (HYDRAULIC RELEASE)
Wet pilot operation uses a pilot line of closed
Sprinklers/QB Detectors containing pressurized
water, supplied through the upstream side of
the Deluge valve, through a restricted orifice. Due
to release of any one of the releasing device, the
water pressure in the top chamber of the Deluge
valve drops and the Deluge valve opens.
c) ELECTRIC RELEASE TRIM
To actuate a Deluge valve electrically, a solenoid
valve is provided to drain the water from the top
chamber of the Deluge valve. A pressure switch is
provided to activate an electric alarm, to shut
down the desired equipment or to give “Tripped”
indication of the Deluge valve. In addition to this a
pressure switch can also monitor “Low air
pressure” and “Fire condition” when used in dry
pilot air line.
d) TEST AND ALARM TRIM
This trim is supplied with a test valve provided to
test the normal operation of the sprinkler alarm
bell. The sprinkler alarm can be supplied additionally,
which bells on actuation of the Deluge valve.
e) DRAIN AND DRIP TRIM
This consists of main and system drain valve in
addition with drip valve.
TRIM
MODEL
NO.
TRIM DESCRIPTION MOUNTING SCHEMATIC
NO.
ET-W Basic Wet Pilot Trim Vertical Schematic 1
ET-D Basic Dry Pilot Trim Vertical Schematic 2
ETW-T Basic Wet Pilot Trim with Test & Alarm Trim Vertical Schematic 3
ETD-T Basic Dry Pilot Trim with Test & Alarm Trim Vertical Schematic 4
ETW-D Basic Wet Pilot Trim with Drip & Drain Trim Vertical Schematic 5
ETD-D Basic Dry Pilot Trim with Drip & Drain Trim Vertical Schematic 6
NT-W Basic Wet Pilot Trim with Test & Alarm Trim and Drip & Drain Trim Vertical Schematic 7
NT-D Basic Dry Pilot Trim with Test & Alarm Trim and Drip & Drain Trim Vertical Schematic 8
ET-W Basic Wet Pilot Trim Horizontal Schematic 9
ET-D Basic Dry Pilot Trim Horizontal Schematic 10
ETW-T Basic Wet Pilot Trim with Test & Alarm Trim Horizontal Schematic 11
ETD-T Basic Dry Pilot Trim with Test & Alarm Trim Horizontal Schematic 12
ETW-D Basic Wet Pilot Trim with Drip & Drain Trim Horizontal Schematic 13
ETD-D Basic Dry Pilot Trim with Drip & Drain Trim Horizontal Schematic 14
NT-W Basic Wet Pilot Trim with Test & Alarm Trim and Drip & Drain Trim Horizontal Schematic 15
NT-D Basic Dry Pilot Trim with Test & Alarm Trim and Drip & Drain Trim Horizontal Schematic 16