4
Servicing First and Second Checks
1. Slowly open all ball valves to relieve air and water pressure.
After pressure is relieved, loosen bolts on groove coupler and
remove groove coupler and cover plate from valve body.
2. Remove #1 Check Assembly. Do not use Check Arm as a
handle to unscrew the Check. Insert lid bolts in 1st check seat
ring (see fig. 1), insert a long screwdriver or pry bar between
lid bolts. Gently apply pressure against the bolts and turn seat
assembly counter clockwise moving bolts hole to hole to main-
tain turning leverage (two additional bolts will eliminate need to
move lid bolts from hole to hole). Finish unscrewing by hand
and remove through top access port. Unscrew #2 Check (turn
counter-clock wise) by placing a long screwdriver across lid
Figure 1
Figure 2
bolts inserted in holes located in the 2nd check seat ring, simi-
lar in method used to remove 1st check and applying pressure
to loosen #2 Check. Finish unscrewing by hand.
3. To clean Check, locate the Check Arm opening stud on the out
let flange of the valve assembly. Slide the Arm over the stud
with the check threads facing downward (fig. 2). Tighten 1/4"
nut on stud to secure cam bar. Slowly pull the assembly out
ward to open check allowing exposure of the seat and clapper
contact area for cleaning. The assembly may be locked open by
aligning the holes in the cam bar and hinge arms and inserting
a rod (fig. 4).
REMOVING CHECK ASSEMBLIES
(Before servicing be sure shutoff valves are closed)
Watts Series 995/995RPDA
Check Disassembly
Please use caution when disassembling check.
The check is a spring-loaded mechanical device.
Figure 3
Press down on the check assembly
to unload the cambar from hinge
arms and roller. Then place a thin
rod or screwdriver into a mainte-
nance hole in one hinge arm.
Figure 4
Using your free hand, swing the
clapper assembly away from the
seat. Align (A) lockout holes.
Figure 5
Remove 1 c-clip from the center
pivot pin. Withdraw the center pivot
pin from the clapper and the hinge
arms. Remove the clapper
assembly from the check assembly
module. Note: You may replace
this item as an assembly or you
may replace only the disc.
Disassemble the clapper by
removing 4 screws, disc retainer
and the clapper disc. Disc may be
flipped if sealing surface is dam-
aged.
Figure 6
Before reinstallation of check assembly, thoroughly clean O-ring groove and
lubricate O-ring with F.D.A. approved lubricant.
Screwdriver or Prybar
Screwdriver or Prybar
Cover Bolts
Check
Body
Check
3", 4" & 6" RP 1st Check Assmbly
Содержание 995 Series
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