Instruction No EF 5000 E
01/2004
15
position indicator mark on front cover (32).
Note: If the unit is air-to-open replace clevis
locknut (46) and clevis (35).
K.
Proceed to one of the following sections for final
adjustment. Air-to-Open, section (K-1), Air-to-
Close section (K-2).
K-1. Air-to-Open
After completing step A through J of section 11.,
proceed as follows:
A.
Scribe a line on the clevis (35) in line with the
inside of the yoke.
B.
Connect a regulated air supply directly to the
actuator and gradually apply 8 psig for No. 9
actuator and 7 psig for the others.
C.
The clevis should move at least 1/4".
D.
With the lever and valve plug in the fully
CLOSED position, the holes in the clevis (35)
and lever (34) should be in line.
Note: if holes are in line proceed to step J. If not
in line, continue to next step.
E.
Move lever (34) to full open position.
F.
Gradually apply sufficient air pressure to
extend clevis locknut (46) to an accessible
position.
G.
Loosen clevis locknut (46).
H.
Reduce air pressure to actuator to 7 psig.
I.
Screw clevis (35) in or out on actuator stem
so that the holes in the clevis (35) and lever
(34) are aligned with the lever and plug in the
fully
closed
position.
J.
Insert clevis pin (7) so indicator dot is visible
through front cover (32) and secure with
clevis pin clips (5).
Note: On the 6" and 7" model actuators, without
the adjustable indicator (88), the clevis pin (7)
must be installed so it protrudes toward the front
cover (32). If the indicator dot is damaged, paint
may be applied to the end facing the front cover
(32) to make it more visible.
K.
Gradually apply sufficient air pressure to
extend clevis locknut (46) to an accessible
position and tighten firmly.
L.
Relieve air pressure.
M.
If used, replace adjustable indicator (88) to
lever (34) with screws (89).
Note: If required, adjust indicator to front cover
indicator marks.
N.
Replace front cover (32) and rear cover (29)
and secure in place with cover screws (30).
O.
Replace spring barrel boss cover (58) and
bottom cover (11). (Snap fit.).
Note: Prior to placing the valve in service,
operate the valve actuator through one complete
cycle to insure proper functioning.
P.
If desired, set handwheel (53) or optional
limit stop (77) to desired position.
K-2. Air-to-Close
After completing step A through J of section 11.
proceed as follows:
A.
Manually push lever (34) to the full CLOSED
position.
B.
Connect a regulated air supply to the
actuator.
C.
Gradually apply the final air pressure
corresponding to the closed position. See
value on the serial plate.
D.
With the lever (34) and valve plug in the
CLOSED position, the holes in the clevis (35)
and lever (34) should be in line.
Note: If holes are in line proceed to step H, if not
in line, continue to the next step.
E.
Release air pressure so clevis (35) will
separate from lever (34).
F.
Loosen clevis locknut (46).
G.
Screw clevis (35) in or out so that when the
air pressure corresponding to the closed
position mentioned in C above is applied,
clevis holes and lever will be in line.
H.
Insert clevis pin (7) so indicator dot is visible
through front cover (32) and secure with
clevis pin clips (5).
Note: On the 6" and 7" model actuators, without
the adjustable indicator (88), the clevis pin (7)
must be installed so it protrudes toward the front
cover (32). If the indicator dot is damaged, paint
may be applied to the end of the clevis pin (7)
facing the front cover (32) to make it more visible.
Caution: the relationship must be as shown in
figure 18. If it is not, the yoke must be
separated from the body and the lever (34)
repositioned on the shaft. Refer to
appropriate section. Failure to comply could
result in the valve short stroking or over
stroking and could damage the valve.
Caution: Do not exceed pressure listed in
Figure 14 for the actuator used.
Caution: Do not exceed pressure listed in
figure 14 for the actuator used.
