Val-Matic Tilted Disc Check Valve - Manual (Page 7)

6
REASSEMBLY OF VALVE (Cont’d)
10. Slowly lower the disc into the beveled seat ring,
using care not to drop or allow the disc to swing
into the seat ring. After the disc is in place,
carefully align the disc’s pivot trunnions, so they
are at equal distance from the diagonal flange
locating pin holes and that the disc ring is parallel
to the seat ring.
11. Lightly lubricate and install the diagonal flange
gasket or O-ring seal (after 2013) on the face of
the seat body half diagonal flange and align the
holes in the gasket with the holes in the flange.
The two small holes must be aligned with the two
locating pin holes (27).
12. Install two temporary slip-fit locating pins into the
seat body half’s diagonal flange. Hoist the pivot
body half over the seat body half and lower the
diagonal flange with 1/2” of the mating flange.
Align the locating pin holes (27). Once the
diagonal flanges are aligned, the pivot body half
can be lowered.
13. Apply a lubricant to the flange bolt threads (7).
Once all of the diagonal flange bolts are inserted,
tighten them hand tight. The torquing of the
diagonal flange bolts should then be done in
three graduated steps using the cross-over
tightening method to load the bolts evenly.
14. Remove the temporary slip-fit locating pins from
the diagonal flange and install the permanent
locating pins (27).
15. Insert the indicator shaft assembly (20) through
the 9/16” diameter hole in the indicator pivot pin
(19) and insert the assembly into the body
trunnions bore. Align the slot in the indicator pin,
which is threaded into the disc. Install the pivot
pin into the opposite trunnions bore.
16. Install the two indicator o-ring seals into the
grooves of the indicator shaft. Make sure that the
seals are not twisted within the grooves. Apply
some grease on the seals. Lightly lubricate the
pivot pin cover gasket and place it on the
machined face of the indicator pin cover (16) and
install the cover (16) over the indicator shaft.
Insert the pivot pin cover bolts (18) and tighten
hand tight. The torquing of the bolts should be
done in two graduated steps using the cross-over
tightening method to load the bolts evenly.
17. Install the external indicator washer (21) over the
indicator shaft. Place the indicator pointer (22)
on the end of the indicator shaft. The pointer
should point toward the letter “C” cast on the
indicator pivot pin cover. Slip the indicator
lockwasher (25) and jam nut (26) while holding
the indicator pointer. Do not over-tighten.
18. Lightly lubricate the opposite pivot pin cover
gasket (17) and place it on the machined face of
the pivot pin cover (16) and install the cover to
the other pivot body half’s trunnions boss. Insert
the pivot pin cover bolts (18) and tighten hand
tight. The torquing of the bolts should be done in
two graduated steps using the cross-over
tightening method to load the bolts evenly.
19. Lightly lubricate the inspection hole gasket (15)
on the machined face of the inspection hole cover
(13) and install the cover to the inspection hole
port located on each body half. Insert the cover
bolts (14) and tighten hand tight. The torquing of
the bolts should be done in two graduated steps
using the cross-over tightening method to load
the bolts evenly.
20. The pivot trunnions must be lubricated with a
waterproof, FDA approved grease, as outlined in
the maintenance section. Install grease fittings
(23) and pump grease into each fitting until the
grease is observed at the interface of the pivot
pin bushing’s inside diameter (5) and the pivot
pin’s outside diameter (4).
21. Operate the valve several times, with the use of a
hoist, to ensure correct operation before re-
installing the valve.