Tyco DV-5 Manual

DV-5 Deluge Valve, Diaphragm Style,
1-1/2 thru 8 Inch (DN40 thru DN200),
Deluge System – Dry Pilot Actuation
General
Description
The DV-5 Deluge Valve (described in
Technical Data Sheet TFP1305) is a
diaphragm style valve that depends
upon water pressure in the Diaphragm
Chamber to hold the Diaphragm closed
against the water supply pressure.
When the DV-5 Valve is set for service,
the Diaphragm Chamber is pressurized
through the trim connections from the
inlet side of the system's main con-
trol valve, for example an O.S.&Y. gate
valve or butterfly valve (Ref. Figures 1
and 4).
Opening of a dry pilot sprinkler releas-
es pneumatic pressure from the pi-
lot line. In turn, the Dry Pilot Actuator
(Item D3 - Fig. 3A and 5) opens and
releases water from the Diaphragm
Chamber faster than it can be replen-
ished through the 1/8 inch (3,2 mm) re-
striction provided by the Model ASV-1
Automatic Shut-Off Valve in the dia-
phragm supply connections (Item 5 -
Fig. 3A and 5, also described in Tech-
nical Data Sheet TFP1384). This results
in a rapid pressure drop in the Dia-
phragm Chamber, and the force differ-
ential applied through the Diaphragm
that holds it in the set position is re-
duced below the valve trip point. The
water supply pressure then forces the
Diaphragm open permitting water to
flow into the system piping, as well as
through the Alarm Port to actuate the
system alarms.
As water flows into the system, the pi-
lot chamber of the Model ASV-1 Auto-
matic Shut-Off Valve (Item 5 - Fig. 3A
and 5) becomes pressurized and the
ASV-1 automatically shuts off the di-
aphragm chamber supply flow to the
DV-5 Diaphragm Chamber. Shutting
off the diaphragm chamber supply flow
prevents the DV-5 Diaphragm Chamber
from becoming re-pressurized, there-
Page 1 of 16
by preventing inadvertent closing of the
DV-5 during a fire (as may be the case
if an actuation device other than a pi-
lot sprinkler were to be closed after its
initial operation, e.g., a remote manual
control station).
NOTICE
The DV-5 Deluge Valve with Dry Pilot
Actuation Trim described herein must
be installed and maintained in compli-
ance with this document, as well as
with the applicable standards of the
National Fire Protection Association, in
addition to the standards of any other
authorities having jurisdiction. Failure
to do so may impair the performance
of these devices.
JULY 2014
Worldwide
www.tyco-fire.com
Contacts
The owner is responsible for maintain-
ing their fire protection system and de-
vices in proper operating condition.
Contact the installing contractor or
manufacturer with any questions.
TFP1315