Instruction No EF 5000 E
01/2004
14
G.
Using the seat ring wrench, tighten seat ring
retainer to the minimum torque value specified in
figure 12.
Note: In some cases, for the valves from 3" to 12"
with metal seat, the alignment can be improved by
placing a piece of paper 0.10mm (0.004") thick and
approximately 6 mm (1/4") wide at a point where the
leading edge of the plug contacts the seat ring and
close the plug. With a slight pressure on the lever,
the paper strips should both be clamped in place. For
the valve 8" to 12", the piece of paper shall be 0.20
mm (0.008") thick and 12 mm (1/4") wide.
H.
Proceed to section on body to actuator
assembly.
10.7 DVD PLATE REASSEMBLY
Using the same method and tooling as described in
8.3.2 tighten the Lo-dB plate at the indicated torque
given in the table of figure 13.
(Refer to figures 16 and 17).
Correct actuator stem adjustment is imperative for
proper valve functioning. With the actuator
assembled to the valve in the desired location and
orientation proceed as follows:
Note: If any of the following steps were completed
during maintenance or reorientation of actuator to
valve, proceed to the next step.
A.
Remove front cover (32) and rear cover (29) by
removing the two-cover screws (30).
B.
Back off handwheel (53) so it does not interfere
with the operation of the lever (34).
C.
If applicable, back off optional limit stop (77) so it
will not interfere with the operation of the
lever (34).
D.
Apply air pressure to the actuator and move
lever (34) to an intermediate position.
E.
Remove adjustable indicator (88) by removing
the two screws (89).
F.
Remove clevis pin clip (5), remove clevis pin (7).
G.
Relieve air pressure to the actuator to allow the
clevis (35) and lever (34) to separate.
Note: If the unit is air-to-open, separate clevis
(35) and lever (34) then loosen clevis locknut
(46) and remove clevis.
H.
Insert clevis pin (7) back in lever (34).
I.
Manually push the lever (34) so the valve is in the
closed position.
J.
Temporarily replace front cover (32) and check the
location of the clevis pin (7) in relation to the closed
Valve size
Minimum torque
N.m
Ft.lb
DN 25 (1")
81
60
DN 40 (1"1/2)
130
95
DN 50 (2")
135
100
DN 80 (3")
395
290
DN 100 (4")
490
363
DN 150 (6")
1120
825
DN 200 (8")
1320
975
DN 250 (10")
1830
1350
DN 300 (12")
3050
2250
Figure 12
Tightening torque
N.m
Ft.lb
DN 25 (1")
74
54
DN 40 (1"1/2)
110
81
DN 50 (2")
135
100
DN 80 (3")
295
220
DN 100 (4")
490
363
DN 150 (6")
1050
780
DN 200 (8")
1320
975
DN 250 (10")
1830
1320
DN 300 (12")
3050
2250
Figure 13
Caution: The following procedures must be
adhered to in order to insure correct valve
functioning. Failure to do so could result in
valve damage and equipment malfunction.
Caution: Do not exceed pressure listed in
figure 14 for the actuator used. Do not use
handwheel (53) to move lever (34).
11. Actuator Stem Adjustment
