Cashco Ranger QCT - Manual (Page 8)

IOM-Ranger 8
FIGURE 7
Mechanical Travel Stops - Plug in Closed Position
Front-End View
Mechanical
Stop
Cage (2)
Mechanical
Stops
Cage (2)
Sizes 2" & 4"
(DN50 & 100)
Plug (6)
Plug (6)
FIGURE 8:
Typical Seal Assembly
Sizes 1", 1-1/2", 3", 6" & 8"
(DN25, 40, 80, 150 & 200)
CAUTION
The valve must be isolated from the process, all pres-
sures must be relieved and the unit removed from the
piping system before attempting disassembly.
9. Install washers (23), belleville washers (47) (con-
vex side up) and cap screws (18) and hand tighten.
Reduced port seal re tain ers (3) have re-
cess es ma chined-in to receive the washers
(23, 47). See Figure 17. These ensure that
the elon gat ed port (slot) is prop er ly aligned.
Wrench-tighten the cap screws (18) in 1/2
revolution in cre ments, in an alternating pat-
tern, until tight.
NOTE: The seal retainer gasket (9) and the soft
seal (10) are not “set” until the valve is placed in
the line and compressed between fl anges. If the
seals are “set” by clamping the valve between the
fl ang es during a seat leak age test, retighten the
cap screws (18) to hold the seal retainer (3) and
seals (9, 10 and 11) fi rmly in place. Once a soft
seal (10) is “set” by clamping the valve be tween
fl anges, it cannot be re moved, re in stalled and then
prop er ly centered to pro vide Class VI shutoff.
10. On ATO-FC and ATC-FO Valves with out
handwheel (58), replace cover plate (20)
and machine screws (36). De pres sur ize the
ac tu a tor for ATC-FO valves and dis con nect
tem po rary air sup ply.
11. Return to Section III.A. through F. for in stal-
la tion instructions.
NOTE: All Sizes - Reorient unit so that the back-
end of the body (1) is directed downwards, and
the front-end is up wards and in a horizontal plane
so seals properly align on plug.
7. With plug (6) in the closed position, install the
metal seal (11) with cham fered edge of I.D.
to ward the plug (6); a note is “etched” on the
side of the metal seal (11) stating “TO WARD
PLUG”. Place seal re tain er gas ket (9) against
body (1) face and metal seal (11). Place soft
seal (10) against plug (6) face. See Figure 8
for as sem bly details.
NOTE: The soft seal (10) is not used with anti-
cavitation trim (3) or with some trim des ig na tions.
In reverse fl ow di rec tion, the soft seal (10) is
ineffective.
8. Carefully set seal retainer (3) into position.
Vi su al ly check to see if the soft seal (10) is
centered over the metal seal (11), and that
the plug (6) is closed.
NOTE: To center the seals on the plug (6) face,
hold the seal retainer (3) against the as sem bled
trim parts with light hand pressure and rotate the
seal retainer (3) back and forth 90°, 3-4 times.
Spin 360° 3-4 revolutions.
D. Stem Removal: