13. Inspect the support assembly and inlet poppet. Re-
place the support assembly if the poppet has caused
extensive wear to the mating face of the support.
14. Lap the sealing surfaces on the outlet poppet, insert,
check valve outlet, inlet poppet, and main body.
See
Lapping the Sealing Surfaces
for the lapping pro-
cedure. Clean all newly-lapped parts with clean sol-
vent such as isopropyl alcohol. Dry and re-inspect
the parts.
Note:
Dimensions for each part are the
minimum
allowed. Parts must be discarded if they become
smaller. Hand lapping, machining, machine grind-
ing, or polishing are acceptable ways to remove sur-
face imperfections from components before final
lapping.
15. Apply Loctite #242 (A-3202) to the threads of the
retainer screw.
16. Position the support assembly on the main body
with the inlet poppet in place and the roll pin in its
locating hole. Tighten the retainer screw to a torque
valve of 40 in-lb (4.52 N-m).
17. Clean and inspect all surfaces in the end cap.
Note:
Thread damage could keep the end cap from
becoming fully seated on the cylinder.
18. Lubricate the check valve body o-rings with white
food grade o-ring lube.
19. Apply a thin film of Blue Lubricant on all check valve
main body shoulder surfaces that contact the end
cap and the high-pressure cylinder.
Apply a thin film of Blue Lubricant to the threads of
the end cap.
20. Use your thumbs to press the check valve body into
the end cap.
21. Thread the end cap onto the cylinder. Make sure
the check valve and end cap turn as an assembly.
Orient the check valve as originally installed. If the
check valve must be rotated, back off the end cap
one-half turn to avoid damaging the o-rings and
high-pressure seals.
22. Torque the end cap by tapping on the spanner
wrench with a mallet or 8 oz. hammer. Do not
over-torque.
Note:
The high-pressure seals are fully functional at
a torque value only slightly more than hand tight.
Torquing the end cap more than 100 ft-lb (75 N-m)
is unnecessary and will make disassembly more
difficult.
23. Apply a thin layer of Blue Lubricant to the radiused
face of the insert and place the insert, radiused face
first, into the check valve main body.
Note:
The Blue Lubricant will help keep the insert
from sticking in the check valve body and make it
easier to remove for service.
24. Apply Blue Lubricant to the check valve outlet body
face and threads. Insert the spring and poppet, small
diameter (chamfered side) of poppet first, into the
outlet body as shown above.
CAUTION
Stretching or compressing the spring unnecessarily will
change spring compression and affect poppet perfor-
mance. When held vertically, poppet shoulder must be
approximately even with the face of the outlet body.
© Flow International Corporation
M-310 | 22
ESL Intensifier
