21
remove the clapper-mounting ring subassembly
from the valve. Visually examine all components
of the seat-clapper-mounting ring subassembly
replacing any component that appears
damaged. New O-rings (#23 & #24, Fig. 7 and
#2, Fig. 7 (8" (200 mm) valve size only)) should
always be used for reassembly.
For Valve Sizes: 4" (100 mm), 165 mm, 6"
(150 mm) with Drop‑In Seat Configuration
only, Refer to Fig. 3 and Fig. 8:
At the rear of the valve, disconnect the water
column drain trim section starting with the elbow
connector (#21, Fig. 3). Then remove the
1
/
4
"
globe valve (#32, Fig. 3), followed by the
3
/
4
"x
1
/
4
" reducing bushing (#53, Fig. 3). Remove the
retaining ring (hand hole cover side) from the
clapper hinge pin (#14, Fig. 8) and push this
pin through the hand hole condensate drain
port and remove the clapper subassembly.
Remove the four retaining screws (#24, Fig. 8)
holding the seal faceplate assembly (#5, Fig. 8).
Inspect the clapper (#3, Fig. 8) visually before
installing. Apply a small amount of silicone
based lubricant to the four retaining screws.
Install a new seal faceplate assembly. Torque
the retaining screws to approximately 40 inch-
pounds and reassemble. If the seat (#2, Fig. 8)
is damaged or it is suspected that the leakage
is through the lower o-ring (#11, Fig. 8), the
seat-clapper subassembly is easily removed as
a unit as follows:
Using a
5
/
16
" Allen wrench, remove the two
3
/
8
"
NPT pipe plugs (#19, (not shown) Fig. 8) located
on the side chamber side of the Model DDX
deluge valve. The seat-clapper subassembly is
retained by two locking pins (#17, (not shown)
Fig. 8). The centers of these pins have a
1
/
4
"-20
threaded hole. Remove the two locking pins
by engaging them with a
1
/
4
"-20 screw and
pulling them out (the two locking pins are not
externally threaded, so turning them with the
attached
1
/
4
"-20 screw or threaded rod is not
recommended. A proven method is to use
1
/
4
"-20 threaded rod with a locknut on the
unassembled end. Grab hold of the locknut
with a pliers or vise-grips and tap the pliers or
vise-grips in the direction away from the Deluge
Valve. Doing so should pull the locking pins out
of the Deluge Valve. With the clapper (#3, Fig. 8)
in the closed position (not latched), dislodge the
clapper-seat subassembly from the valve body
by inserting two slotted screwdrivers under
the lever and clapper mounting ears and pry
up until the clapper-seat subassembly is free
from its bore. Reach into the valve and grasp
the clapper-seat subassembly from the sides.
Making sure the clapper is in the closed position
(see Fig. 1), lift up and rotate the clapper-seat
sub assembly clockwise 90 degrees so that the
lever side of the assembly is facing up towards
the outlet of the deluge valve. Next, rotate the
clapper-seat sub assembly 90 degrees about
the centerline of the valve so that the clapper
is facing the hand hole opening and the lever
is still facing the outlet of the deluge valve.
Then rotate the clapper-seat sub assembly 90
degrees, so that the clapper is now facing the
outlet of the deluge valve and the lever is now
facing the back of the valve. Pull the clapper-
seat sub assembly out through the hand hole
opening by the hinge pin side. Rotating the
seat-clapper subassembly up as it is being
removed will help it slide out more easily since
the lever will prohibit it from sliding straight out.
Visually examine all components of the clapper-
seat subassembly replacing any component
that appears damaged. New o-rings (#11,
Fig. 8) should always be used for reassembly.
Reassembly:
For Valve Sizes: 2" (50 mm), 2‑
1
/
2
" (65 mm),
76 mm, 3" (80 mm), 8" (200 mm) and 4"
(100 mm), 6" (150 mm) & 165 mm with
Screw‑In Seat Configuration only, Refer to
Fig. 7:
Clean the bore of the valve body. Lubricate the
bore with O-ring grease. Lubricate and install
the O-rings (#23 & #24, Fig. 8) onto the seat.
Lubricate and install the mounting ring o-ring
(#2, Fig. 7) into the body (8" (200 mm) valve
size only). Insert the clapper-mounting ring
subassembly into the handhold opening of the
Deluge Valve using caution to not damage or
dislodge the mounting ring o-ring (#2, Fig. 7)(8"
(200 mm) valve size only). Align the mounting
ring so that the Lever (#15, Fig. 7) is near the
pushrod (#25, Fig. 7) and the mounting ring (#5,
Fig. 7) “ears” are between the tabs of the valve
body (#1, Fig. 7). Insert the seat (#29, Fig. 7)
into the valve body (#1, Fig. 7) and through
the clapper-mounting ring subassembly. Start
to tread the seat (#29, Fig. 7) into the body
by hand, then tighten the seat (#29, Fig. 7)
with Reliable P/N 6881603000 Seat Wrench
for 2" (50 mm), 2-
1
/
2
" (65 mm), 76 mm and 3"
(80 mm) valve sizes, Reliable P/N 6881604000
Seat Wrench for 4" (100 mm) valve size,
Reliable P/N 688106000 Seat Wrench for 6"
(150 mm and 165 mm valve sizes or Reliable
P/N 6881608000 Seat Wrench for 8" (200 mm)
valve size until it bottoms out on the mounting
ring (#5, Fig. 7). Verify that the seat-clapper-
mounting ring subassembly is in the fully down
position between the tabs of the body, and
check to see that the lever (#15, Fig. 7) lines
up with the push rod (#25, Fig. 7). Loosen
and reassemble if necessary. Reassemble
the handhold cover (#7, Fig. 7) and set up the
Model DDX Deluge Valve as per the section
