Tyco DV-2 Manual

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Model DV-2 Deluge Valve
2 Inch (DN50), 175 psi (12,1 bar)
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General
Description
The 2 inch (DN50) Model DV-2 Deluge
Valve is a quick opening, hydraulically
operated differential type valve de-
signed for fire protection system serv-
ice. It is used as an "automatic water
control valve" in deluge, preaction, and
special types of fire protection sys-
tems. The Model DV-2 Deluge Valve
also provides for actuation of fire
alarms upon system operation.
Operation of the DV-2 Valve is pro-
vided by an actuation (detection) sys-
tem that is separate from the normally
dry system piping. Trim configuration
options for automatic operation of the
DV-2 include wet pilot actuation, dry
pilot actuation, and electric actuation.
Trim arrangements also provide for lo-
cal emergency (manual) release of the
Model DV-2 Deluge Valve.
The Model DV-2 Deluge Valve is a re-
designation for the Gem Model B
Flooding Valve and Star Model B Del-
uge Valve.
WARNING
The Model DV-2 Deluge Valve de-
scribed herein must be installed and
maintained in compliance with this
document, as well as with the applica-
ble standards of the National Fire Pro-
tection Association, in addition to the
standards of any other authorities hav-
ing jurisdiction. Failure to do so may
impair the integrity of this device.
The owner is responsible for maintain-
ing their fire protection system and de-
vices in proper operating condition.
The installing contractor or sprinkler
manufacturer should be contacted
relative to any questions.
Page 1 of 12
Technical
Data
Approvals:
UL and C-UL Listed (wet pilot, dry pi-
lot, or electric actuation).
FM Approved (wet pilot, dry pilot, or
electric actuation).
LPCB Approved (wet pilot or dry pilot
actuation).
Deluge Valve:
The Model DV-2 Deluge Valve is to be
installed vertically, as shown in Fig-
ures 1 and 2, with the inlet connection
at the bottom and the outlet connec-
tions to the side. It is rated for use at a
maximum service pressure of 175 psi
(12,1 bar). Installation dimensions are
shown in Figure 1.
The Model DV-2 Deluge Valve may be
arranged for a 1-1/2 inch (DN37), 2
inch (DN50), or 2-1/2 inch (DN65) dis-
charge outlet. In the case of 2 or 2-1/2
inch discharge, either the 2 or 2-1/2
Inch Discharge Trim shown in Figure 3
is utilized.
The approximate friction losses based
on the Hazen and Williams formula
and expressed in equivalent length of
Schedule 40 outlet pipe with C=120
are as follows: 10 feet of 1-1/2 inch
pipe, 30 feet of 2 inch pipe, and 68 feet
of 2-1/2 inch pipe. The equivalent feet
of pipe for the 2 and 2-1/2 inch outlet
size pipe includes friction loss for the
DV-2 Valve plus the Discharge Trim
shown in Figure 3.
Components for the DV-2 are shown in
Figure 1. The Body and Cover are
natural finish bronze castings with in-
tegral machined seats for the Center
Valve Assembly, and the Body Gasket
is neoprene. The Center Valve Assem-
bly consists of a bronze Center Valve,
a flexible EPDM Diaphragm held in
place by a bronze Diaphragm Retain-
ing Ring assembled with three self-
locking Flat Head Machine Screws, as
JANUARY, 2004
well as an EPDM Facing held in place
by a stainless steel Washer assembled
with a self-locking stainless steel
Hexagon Machine Screw. Correct
alignment of the Center Valve assem-
bly and the machined seats with the
Body is maintained by the bronze
Guide Rod which is screwed into the
Cover.
Valve Trim
The Basic Trim, Alarm & Test Trim, Dry
Pilot Actuation Trim, and Electric Ac-
tuation Trim illustrated in Figures 2, 4,
5, and 6 form a part of the laboratory
listings and approval of the Model DV-2
Deluge Valve and are necessary for
proper operation of the Model DV-2
Deluge Valve. The trim packages pro-
vide for the following items:
• Water Supply Pressure Gauge
• Upper Chamber Pressure Gauge
• Chamber Connections
• Actuation Devices (as applicable)
• Main Drain Valve
• Alarm Test Valve
• Alarm Control Valve
• Automatic Drain Valve
TFP1340