Tyco DPV-1 Manual

Model DPV-1 Dry Pipe Valve, DN100 and DN150
Model ACC-1 Dry Pipe Valve Accelerator
European Conformity Valve Trim, 16 bar
SECTIONS
General Description . . . . . . . . . . . 1
Dry Pipe Valve. . . . . . . . . . . . . . 1
Accelerator . . . . . . . . . . . . . . . . 1
Technical Data . . . . . . . . . . . . . . . 4
Operating Principles. . . . . . . . . . 10
Dry Pipe Valve. . . . . . . . . . . . . 10
Accelerator . . . . . . . . . . . . . . . 10
Installation . . . . . . . . . . . . . . . . . 11
Valve Setting Procedure. . . . . . . 11
Care and Maintenance . . . . . . . . 12
Limited Warranty . . . . . . . . . . . . 13
Ordering Procedure . . . . . . . . . . 22
Summary Instructions . . . . . . . . . .
. . . . . . . . . . . . . . . Appendices A-H
TABLES
A - Air Pressure Requirements. . . 4
B - Trim Cross Reference. . . . . . . 5
C - Accelerator Fill Times. . . . . . 12
FIGURES
1A - DN100 DPV-1 Assembly . . . . 2
1B - DN150 DPV-1 Assembly . . . . 3
2 - Pressure Loss . . . . . . . . . . . . . 4
3 - Valve Take-Out Dimensions . . 5
4 - DPV-1 Valve Operation . . . 6 & 7
5 - Accelerator Assembly. . . . . . . 8
6 - Accelerator "Set" . . . . . . . . . . 9
7 - Accelerator "Tripped" . . . . . . . 9
Valve Trim is illustrated in Figures 8
thru 15. Refer the Table B on Page 5
for types of trim and corresponding
figure and page number.
Page 1 of 22
General
Description
Dry Pipe Valve
The DN100 and DN150, TYCO Model
DPV-1 Dry Pipe Valves are differential
valves used to automatically control the
flow of water into dry pipe fire protec-
tion sprinkler systems upon operation
of one or more automatic sprinklers.
The Model DPV-1 Dry Pipe Valve also
provides for actuation of fire alarms
upon system operation. Features for
the Model DPV-1 Dry Pipe Valve are as
follows:
• External reset
• 16 bar pressure rating
• Unique offset single clapper design
enabling a simple compact valve to
minimize installation labor
• Ductile iron construction to ensure
a lightweight valve to minimize ship-
ping cost
• A variety of inlet and outlet
connections
• Simple reset procedure through the
elimination of priming water
Dry pipe sprinkler systems are used in
unheated warehouses, parking garag-
es, store windows, attic spaces, load-
ing docks, and other areas exposed
to freezing temperatures, where water
filled pipe cannot be utilized. When set
for service, the dry pipe sprinkler sys-
tem is pressurized with air (or nitrogen).
The loss of pressure through an oper-
ated automatic sprinkler in response
to heat from a fire permits the Model
DPV-1 Dry Pipe Valve to open and al-
low a flow of water into the sprinkler
system piping. Table A establishes the
minimum required system air pressure
that includes a safety factor to help pre-
vent false operations that occur due to
water supply fluctuations.
Accelerator
The optional TYCO Model ACC-1 Dry
Pipe Valve Accelerator is a quick open-
ing device that is intended to reduce
the time for valve operation follow-
ing the operation of one or more au-
tomatic sprinklers. The Model ACC-1
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Accelerator automatically adjusts to
both small and slow changes in sys-
tem pressure, but trips when there is a
rapid and steady drop in pressure (as
in the case of a sprinkler operation).
Upon tripping, the Accelerator trans-
mits system air pressure to the inter-
mediate chamber of the Model DPV-
1 Dry Pipe Valve. This neutralizes the
differential pressure holding the Model
DPV-1 Dry Pipe Valve closed and per-
mits it to open.
The Model ACC-1 Dry Pipe Valve
Accelerator has a unique, positive ac-
tion, internal anti-flood device and a ball
float which combine to prevent water
and water borne debris from entering
the more sensitive operating areas of
the accelerator. The anti-flood device
seals and latches immediately upon op-
eration of the Model ACC-1 Dry Pipe
Valve Accelerator without waiting for
a pressure build-up in the intermedi-
ate chamber of the Dry Pipe Valve. The
latching feature keeps the anti-flood de-
vice sealed, even while the system is
being drained. The ball float seals the
pilot chamber inlet port if there is an in-
advertent trip of the Dry Pipe Valve, due
for example, to an air compressor fail-
ure combined with a slow loss in sys-
tem air pressure due to a leak.
NOTICE
The Model DPV-1 Dry Pipe Valves
and Model ACC-1 Dry Pipe Valve
Accelerators described herein must be
installed and maintained in compliance
with this document and the standards
recognized by the Approval agency,
800-381-9312
TFP1090