Tyco DN40 - Page 5

TFP1335
Page 5 of 26
Wet Pilot
Actuation
The Wet Pilot Actuation Trim forms a
part of the laboratory approval of the
DV-5 Valves and is necessary for their
proper operation.
The Wet Pilot Actuation Trim provides
for connection of a detection system
consisting of wet pilot line sprinklers
(heat detectors) and manual control
stations interconnected with minimum
DN15 steel pipe. The pilot line is con-
nected to the Wet Pilot Line Connection
shown in Figure 4.
Installation dimensions are provided in
Figure 19.
Pilot sprinklers are to be minimum 80
K-factor orifice approved automatic
sprinklers. Manual Control Stations
are to be the Model MC-1 described in
Technical Data Sheet TFP1382.
The maximum height of a wet pilot line
above the DV-5 Valve must not exceed
the limitations shown in Table B as a
function of the minimum water supply
pressure to the DV-5 Valve for an equiv-
alent length (pipe plus fittings) of the
pilot line up to 150 meters to the most
remote pilot sprinkler.
Provision must be made for install-
ing a 80 K-factor orifice, Inspector’s
Test Connection at the most hydrauli-
cally demanding location of a wet pilot
line (usually adjacent to the highest
and most remote wet pilot sprinkler or
manual control station).
NOTES: Wet Pilot Lines must be main-
tained at a minimum temperature of
4°C.
At a minimum, it is recommended that
internally galvanized pipe and cast iron
fittings be used for wet pilot lines.
Diaphragm Supply Connection
Water Motor Alarm Connection
Wet Pilot Line Connection
Automatic Shut-Off Valve
Diaphragm Supply Strainer
Stop Valve
Diaphragm Gauge
Manual Control Station
Diaphragm Supply Valve
System Gauge
Main Drain Valve
System Drain Valve
Waterow Switch
Alarm Test Valve
Alarm Control Valve
Water Supply Gauge
Automatic Drain Valve
Description
DV-5 Valve
B
1
P
Q
C
G
2
H
F
J
D
N
A
3
E
L
1
2
3
B
K
M
N
Q
P
M
L
K
F
G
H
J
D
E
C
Item
A
FIGURE 4
WET PILOT ACTUATION
(Refer to Figures 7 thru 10 for specific Bills of Material)