DV-5a Automatic Water Control Valve Electric/
Electric Double Interlock Preaction Fire Protection
Systems 1 1/2 Inch to 8 Inch (DN40 to DN200)
Page 1 of 18
SEPTEMBER 2022
TFP1466
Worldwide
Contacts
www.tyco-fire.com
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Refer to Technical Data Sheet
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General
Description
The TYCO DV-5
a
Automatic Water
Control Valves are diaphragm type
valves that can be used in double inter-
lock preaction fire protection systems.
When properly trimmed, the double
seat design of the DV-5
a
Valve also
provides actuation of fire alarms upon
system operation.
The diaphragm style design of the
DV-5
a
Valve allows external resetting,
providing for easy resetting of a deluge
system without having to open a valve
handhole cover to manually reposition
a clapper and/or latch mechanism.
Simply re-pressurizing the diaphragm
chamber resets the valve.
The DV-5
a
features internal and exter-
nal coating of the valve to provide
corrosion resistance. The external cor-
rosion resistance of the epoxy coating
permits the use of the DV-5
a
in cor-
rosive atmospheres associated with
many types of industrial processing
plants and outdoor installations.
The DV-5
a
Valves are offered with the
DV-5
a
Valve and separately ordered
semi-assembled trim shown in Figures
6 and 7, or, for ease of installation, with
DV-5
a
Valve completely trimmed with or
without a System Main Control Valve.
Double interlock preaction systems are
designed for use in applications, such
as refrigerated areas, requiring the
maximum degree of protection against
inadvertent flooding of the sprinkler
system piping. In order for a double
interlock preaction system to automat-
ically activate, two independent events
must occur. First, the electric detection
system must operate, and secondly,
an automatic sprinkler on the system
piping must operate. Typically, the
electric detection system is designed to
operate before any automatic sprinkler.
Operation of just the electric detection,
or just the opening of a sprinkler will
not allow the DV-5
a
Valve to open and
permit water to flow into the normally
dry sprinkler system piping. However,
operation of just the electric detec-
tion system or the opening of a sprin-
kler (loss of system air pressure) will
result in a supervisory alarm to notify
the building occupants of a condition
Available End Connections and Weights — lb/(kg)
End Connection
Nominal Valve Size
ANSI Inches
(DN)
Inlet
Outlet
1 1/2
(40)
2
(50)
3
(80)
4
(100)
6
(150)
165,1
mm
8
(200)
Thread
Thread
26
(11,8)
25
(11,3)
N/A
N/A
N/A
N/A
N/A
Groove
Groove
25
(11,3)
25
(11,3)
60
(27,2)
95
(43,1)
177
(80,3)
177
(80,3)
327
(148,3)
Flange
Groove
N/A
N/A
66
(30,0)
106
(48,1)
190
(86,2)
N/A
346
(157,0)
Flange
Flange
N/A
N/A
72
(32,7)
116
(52,6)
204
(92,5)
N/A
365
(165,6)
