4.
System Operation
When set correctly for service, the Model DDX Deluge
Valve is hydraulically established to withhold the supply
water from the sprinkler system piping. The Reliable
Model DDX Deluge Valve is shown in both closed and
open positions in Fig. 1. In the closed position, the supply
pressure acts on the underside of the clapper and also on
the push rod through the push rod chamber’s inlet restric-
tion. The resultant force due to the supply pressure acting
on the push rod is multiplied by the mechanical advan-
tage of the lever and is more than sufficient to hold the
clapper closed against normal supply pressure surges.
Item
No
.
Part
Number
Description
No.
Req’d
1
6103022000
Assembly, Valve, 2” (50mm) DDX
1
6103022500
Assembly, Valve, 2
1
2
” (65mm) DDX
6103030000
Assembly, Valve, 3” (80mm) DDX
6103027600
Assembly, Valve, 76mm DDX
2
7G05080800
Coupling, Rigid, 2" (50mm
)
1
7G05101000
Coupling, Rigid, 2½" (65mm
)
7G05121200
Coupling, Rigid, 3" (80mm
)
3
6205212000
Water - Ball Valve, 2” (50mm
)
1
6215051000
Water - Butterfly Valve, 2½” (65mm
)
6215051200
Water - Butterfly Valve, 3” (80mm
)
4
7D05414200
Coupling, 2” (50mm) Grooved
w/ ½” NPT outlet
1
7D05424200
Coupling, 2
1
2
” (65mm) Grooved
w/ ½” NPT outlet
7D05434200
Coupling, 3” (80mm) Grooved
w/ ¾” NPT outlet
5
6999991212
Pressure Switch, EPS10A-2
1
6999992360
Pressure Switch, (ULC) EPS10-2
6
6871020000
Valve, Solenoid (175 psi
)
1
6871020020
Valve, Solenoid (250 psi
)
7
98048025
Bushing, Reducer, ¾" x ¼
"
(2" & 2½" Valve only
)
1
Bushing, Reducer, ¾" x ¼
"
(3" Valve only
)
2
8
98048000
Bushing, Reducer, ½" x ¼
"
(2" & 2½" Valve only
)
1
Bushing, Reducer, ½" x ¼
"
(3" Valve only
)
--
9
92056810
Brass Connector, 3/8" ID x ½" NPT
1
10
92056702
Brass Connector. 3/8" Tubing x ¼' NPT
2
11
92056704
Elbow Connector, 3/8" Tube x ½” NPT
1
12
78653000
Model B Manual Emergency Station
1
13
78653004
Valve, Caution Station, ½
”
1
14
98048015
Reducer, 2” x 1”, PVC
1
15
98048022
Bushing, Reducer, ¾" x ½
"
2
16
96816902
Valve, Check, ¼" In-Line
1
17
92056705
Elbow Connector, 3/8" Tube x ¼” NPT
1
18
6304000100
Pressure Maintenance Device, Model A2
1
19
98050004
Drain Cup, PVC
1
20
98174400
Street Elbow, ½
"
2
21
98174408
Street Elbow, ¼
"
1
22
98174414
Elbow, 1¼
"
1
23
98174403
Elbow, 1
"
1
24
98174404
Elbow, ¼
"
1
25
98174402
Elbow, ¾
"
1
26
96920912
Flex Line, ½
"
1
27
98248000
Gauge, Pressure, Air
2
28
98248001
Gauge, Pressure, Water
2
29
94616918
Nameplate, Double Interlock, Type D
1
30
98543239
Nipple, 1¼" x 3
"
1
31
98543250
Nipple, 1¼" x 4
"
1
32
98543285
Nipple, 1¼" x Close
1
33
98543263
Nipple, 1" x 3
”
2
34
98543213
Nipple, 1" x Close
1
35
98543223
Nipple, ½" x 1½
”
9
36
98543210
Nipple, ½" x 2½
”
1
37
98543209
Nipple, ½" x 2
”
4
38
98543230
Nipple, ½" x 3
”
1
39
98543228
Nipple, ½" x 4½”
1
40
98543212
Nipple, ½" x Close
3
41
98543226
Nipple, ¼" x 1½
”
2
42
98543224
Nipple, ¼” x 4½"
1
43
98543243
Nipple, ¼” x 4
"
1
44
98543232
Nipple, ¾" x 2
”
1
45
98543231
Nipple, ¾" x 3
”
1
46
99080002
Pad-Adhesive
1
47
98750003
Cross ½
”
1
48
98604406
Plug, ½
"
1
49
98614403
Plug, ¼
”
3
50
98614401
Plug, ¾
"
2
51
98727607
Strainer, ¼
"
1
52
96606630
Tee, 1¼" x 1¼" x 1
"
1
53
96606607
Tee, ½" x ½" x ¼
"
1
54
98761649
Tee, ½" x ¼" x ½
2
55
98761651
Tee, ½
"
2
56
96606612
Tee, ¾" x ½”x ½
”
1
57
96606601
Tee, ¾
"
1
58
89141112
Tie, Retaining
9
59
98815204
Union, ½", O-Ring Seal
1
60
98815200
Union, ½
"
2
61
98840160
3-Way Valve, ¼
"
2
62
98840106
Valve, Angle, 1¼
"
1
63
98840101
Valve, Angle, ¼
"
1
64
78653100
Valve, Ball Drip, ½
"
1
65
98840117
Valve, Ball, ¼" NPTF x ¼" NPTM
1
66
98840145
Valve, Check, 1
"
1
67
98840181
Valve, Check, ½
"
2
68
98840187
Valve, Check, ¼" NPTF x ¼" NPTM
1
69
98840171
Valve, Globe, ½
"
1
70
-----
-----
--
71
96686722
Tubing, Copper, 3/8” O.D. x 2 ft
.
1
72
96686756
Tubing, Plastic, 3/8” I.D. x 6 ft
.
1
73
98543227
Nipple, ¼" x Close
1
74
98840172
2-Way Valve, ¼"
1
Double Interlock Preaction Trim Parts List (Refer to Fig. 2) - Type D
Item
No.
Part
Number
Description
No.
Req’d
