2.
General
Model H 1½” (40mm) Deluge Riser incorporates a solenoid
operated diaphragm type valve as the primary valve in deluge,
preaction, or special types of fire protection systems.
The valve is easily reset by external means which eliminates
the need for removing the cover.
The trim is factory assembled for every Model H Deluge Ris-
er. This trim provides valve supervising and waterflow alarm
electric connections, pressure gauges, and system draining
provisions.
Actuation by solenoid enables a full range of electrical detec-
tors to be used for remote sensing.
Operation
Model H 1½” (40mm) Deluge Riser employs a quick opening
hydraulically operated, diaphragm actuated solenoid valve.
De-energized: supply pressure is retained at the solenoid
valve inlet. Flow through the valve is prevented by a plunger
closing off the diaphragm pilot orifice and a diaphragm sealing
against the main orifice.
Energized: the plunger is lifted off the pilot orifice and vents
the pressure behind the diaphragm. The venting creates a
pressure imbalance across the diaphragm, which causes the
diaphragm to open the main orifice allowing flow through the
solenoid valve.
Once the solenoid valve has opened, water flows from the
supply through the Deluge Riser into the piping system and to
the alarm initiating water flow pressure switch.
After system shutdown and draining, the Deluge Riser is eas-
ily reset, without special tools, by first restoring detection devic-
es to the ready condition. Once the detection system is ready,
the releasing control panel can be reset which automatically
resets the solenoid valve. Next, the water supply pressure can
be restored and the Deluge Riser will be reset. The external re-
set feature of the Model H 1½” (40mm) Deluge Riser provides
a means for simple, economical system testing which is one
essential facet of a good maintenance program.
Technical Data
Rated working pressure 175 psi (12,1 bar). Minimum
Supply Pressure: 20 PSI (1,4 Bar)
Note:
1 bar=100 kPa
End connections - American Standard Taper Pipe
Threads per ANSI B2.1. Inlet and outlet 1½”. Drain ¾”.
Color-galvanized pipe and fittings with bronze valves.
Shipping Weight - 52 lbs. (23.3 Kg)
Friction Loss - expressed in equivalent length of Sch. 40
pipe, based on Hazen & Williams formula with C=120 is
29 ft. (8.84m) for the Model H Riser Assembly.
Installation position: Vertical
Listed by Underwriters Laboratories, Inc. special system
water control valves - deluge type (VLFT). Listed by Un-
derwriters’ Laboratory of Canada. NYC MEA 258-93-E.
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Figure 1 - Model H Deluge Riser Assembly
