Cashco SAP - Manual (Page 5)

IOM-SAP 5
wear. Examine for signs of leakage. If seat
ring or plug show signs of signifi cant leakage,
determine if op er at ing con di tions - pres sure,
pressure drop, or temperature ex ceed ddesign
lim its. Replace as necessary.
6. Remove spring (22) from within the body (23).
7. Remove seal (28) from body fl ange groove.
8. Clean all metal parts to be reused according
to owner's procedures. NOTE: Regulators are
originally supplied with a level of clean li ness
equal to Cashco cleaning standard #S-1662.
Contact factory for details. Go to Step E.
For 3" & 4" Sizes:
1. Return to Section VII.B. & C. steps 4 thru 8.
2, Remove seal retainer (37) from plug shoulder.
NOTE: Flat surface of retainer touches guide
bearing.
3. Remove cage (19) and ststic seal (15) from
the body. NOTE: Seat (21) maybe stuck to
the bottom of the cage as cage is removed.
If not, remove seat from body cavity.
4. Check the seating surface of the plug for
wear. examine for signs of leakage. If seat
ring or plug shows signs of signifi cant leakage,
determine if op er at ing con di tions - pres sure,
pressure drop, or temperature ex ceed design
lim its. Replace as necessary.
5. Remove spring (22) from within the body (23).
6. Remove seal (28) from body fl ange groove.
7. Clean all metal parts to be reused according
to owner's procedures. NOTE: Regulators are
originally supplied with a level of clean li ness
equal to Cashco cleaning standard #S-1662.
Contact factory for details. Go to Step E.
E. Main Regulator Reassembly:
For 3/4" - 1" Sizes:
1. Insert the return spring (22) into the body (23).
2. Install non-threaded end of plug (20) into the
bore in the bottom of the body. Fit cage O-ring
seal (15) into the body groove.
3. Slide seat (21) over the lower end of the cage.
Place cage over plug into the body. Ensure
that the cage/seat are not cocked to one side.
4. Position seat retainer (37) on shoulder of plug.
Install o-ring (39) on inner shoulder of plug.
5. Properly align all three cage (18) bolt holes as
there is only one proper alignment possible.
Use hand to ap ply a down ward force to the
top of the cage (19) until the cage is lowered
suf fi cient ly to engage the cage bolts (18) with
washers (17) into the body (23). Engage all
cage bolts, then tighten the cage bolts in
al ter nat ing one-half rev o lu tion in cre ments
to pull the cage down evenly. Tight en cage
bolts (18) to a torque value of 13-15 Ft-lbs
(17.5-20.5 Nm).
6. Slide dynamic seal (27) over small end of guide
bearing. Ensure u-cup seal (27) is oriented
with the center-open-down wards as shown in
Fig ure 1, as the u-cup seal de pends upon the
P1-Inlet pressure to activate prop er seal ing
ac tion.
7. Reposition the bearing guide (13) over end of
plug and carefully slide it into the cage. Place
a new u-cup seal (35) with the center-open-
upwards into the recess at the top of the guide
bearing.
8. Place the seal retainer (36) on top of the guide
bearing and engage cap screws (38) tight into
the guide bearing.
9. Thread nut (40) on to plug threads and tighten
as follows:
Sizes - 3/4" - 1" Torque 60-70 ft. lbs.
10. Place new loading chamber seal (28) in
recess in the body fl ange face. Set loading
chamber on top of body. Align matchmarks
from step B.3. and insert nuts and bolts (11 &
12). Tighten bolting equally in a star pattern.
Torque to 35-40 ft. lbs.
For 2" Size:
1. Insert the return spring (22) into the body (23).
2. Install non-threaded end of plug (20) into the
bore in the bottom of the body. Fit cage O-ring
seal (15) into the body groove.