2
3.1
Disassembly - (Refer to Figure 1)
1. Read the instructions in the WARNING Section.
2. Place the valve in the open position.
3. Remove the stem nut (16), shakeproof washer
(19), and handle (17).
4. Remove the lower stem nut (16) and remove and
discard the old disc spring washers (31), if present.
5. Remove the top ground springs (70) (brass valves
only).
6. Remove the compression ring (21).
7. Unfasten the four body bolts (52) and remove the
body cap (2).
8. Turn the stem (4) so that the valve is fully closed.
9. Remove the ball (3).
10. Remove and discard the body seal (6) and seats (5).
11. Press the stem (4) from the top into the valve body
and remove it through the end of the body.
12. Using a pointed instrument, pry out and discard the
old stem seals (8) and (24), and the secondary seal
(7) in fire-tested valves, BEING CAREFUL NOT TO
SCRATCH ANY SEALING SURFACES IN THE
VALVE BODY.
3.2
Assembly - (Refer to Figure 1)
1. Clamping the body (1) securely in a vise, drop in
one seat (5) with the flat surface on the bottom.
2. a.) STANDARD: Insert the lower stem seal (7) from
the inside. Insert the upper stem seal (8) from
the outside of the valve. NOTE: In standard
valves these two seats are identical.
b.) FIRE-TESTED: From the inside, insert second-
ary stem seal (7) first and then red-tinted lower
stem seal (24). Insert the upper stem seal (8)
from the outside of the valve.
3. Insert the stem (4) through the flanged end of the
body (1), and, being careful not to scratch the
seals, press it gently up into the stem hole. DO
NOT attempt to push the stem all the way up into
place. Push it up only until you encounter resistance
from the lower seal.
4. Holding the stem in place from the bottom, drop on
the compression ring (21), top ground spring for
brass
CLINCHER
, and the two disc spring washers
(31) and screw on one stem nut (16).
NOTE: Disc Spring washers have been eliminated on
1/4” - 3/4” sizes, and should only be used if present on
existing valves. For all sizes with Monel
®
trim or for
chlorine service, these washers are not used.
5. Tighten down the nut (16) to the value shown in
(Table 1).
6. Insert the ball (3), rotating it onto the stem (4) in the
closed position. If necessary, turn the stem blade to
align with the ball slot.
7. Insert the body seal (6) and gently press it into the
groove in the body.
As shown in Figure 2, there is a substantial size difference
between the brass and steel
CLINCHER
standard body
seals. They are not interchangeable.
NOTE: Fire-tested spiral wound body seal may be a
loose fit.
8. Insert the second seat (5) in the body cap (2) so
that the sealing surface of the seat is towards the
ball (see detailed diagram in Figure 1).
9. NOTE: The handle stop is part of the body cap (2).
When assembling the valve, be sure the handle
stop that projects from the body cap is in the upper
right hand corner as the body cap faces you (see
Figure 1). Join the body (1) and body cap (2) by
inserting the four body bolts (52). Bolt heads should
be on the body cap.
10. Screw on the four hex nuts (53) with the four lock-
washers (55) until they are snug.
NOTE: A449 carbon steel body bolts do not use lock-
washers. Be careful to see that the body and cap are
properly aligned. Using 2-lb-ft increments, tighten the
bolts alternately in a diagonal pattern, as you would the
lug nuts on an auto wheel, until the torques shown on
page 3 are met.
DO NOT TIGHTEN ONE NUT COMPLETELY, THEN
PROCEED TO THE NEXT.
11. Install the handle (17), the shakeproof washer (19),
and the second stem nut (16) and tighten.
IMPORTANT NOTE: With the valve in the closed posi-
tion, the handle curves up and to the left as the body
cap (2) faces you (refer to Figure 1). The extended
edge of the handle should just touch the handle stop
on the cap.
12. Cycle the valve slowly twice to insure permanent
positioning of the ball between the two seats.
TABLE 1
Stem Nut (Item 16) Assembly Torque
Valve Size - Inches
Torque - lb-in
1/4 - 3/4
30 - 40
1 - 1-1/4
70 - 80
1-1/2 - 2
160 - 170
