IOM-48
21
b. Rotate downtravel stop screw
(35) CCW (viewed from below
screw (35)) until 90° rotation is
reached on the travel indicator
(16).
c. Retighten jam nut (45).
2. Travel beyond 90°. Hub of lower L.H.
rod end (9) may or may not be touch-
ing on downtravel stop screw’s (35)
upper end.
a. Loosen jam nut (45) about four
revolutions.
b. Very slowly release air pressure
into actuator (AA) until travel
in di ca tor (16) is showing at 90°.
c. Rotate downtravel stop screw
(35) CW (viewed from below
screw (35)) until the screw’s (35)
upper edge touch es the hub of
lower L.H. rod end (9).
d. Retighten jam nut (45).
2. Units with ATC-FO (Direct) Action:
a. Loosen jam nut (45).
b. Rotate downtravel stop screw (35) CW
(viewed from below screw (35)).
c. Pressurize actuator (AA) slowly until the
travel in di ca tor (16) indicates that travel
is at 0°; the valve should be in the “fully
closed” position.
d. Adjust gap between downtravel stop screw
(35) and hub of lower L.H. rod end (9) as
indicated in table that follows.
e. Retighten jam nut (45).
(16) shows “0°” travel (no “bright or ange”
show ing from indicator (16))before fully
tight en ing screws (31).
q. Fully release air pressure in actuator
(AA). Observe position of valve on travel
in di ca tor (16). Travel should be short of
“full open”; i.e. 90° rotation.
1. Travel short of 90°. Adjust the push
rod (10) by rotating CCW (viewed from
above) until the travel reaches 90° as
shown by travel indicator (16).
2. Travel beyond 90°. Adjust the push
rod (10) by rotating CW (viewed from
above) until the travel is reduced to
90° as shown by the travel indicator
(16).
r. Rotate lower jam nut (43) to raise uptravel
stop wash ers (54) until the gap clearance
between the lower casing (2) and the
top side of the washer (54) is 1/8"±1/16"
(3mm±1.5mm).
s. Repressurize actuator (AA) to upper val ue
of benchset range. Tighten the lower of
the two upper jam nuts (43) until it is tight,
and secure the uptravel stop washer (54).
Tighten the upper of the two upper jam
nuts (43) down to secure the double jam
nut (43) locking effect. Retighten lower
jam nut (43) on underneath side of wash er
(54).
t. Tighten lower L.H. jam nut (44) down until
locked against lower L.H. rod end (9); nut
(44) is “left-handed”.
u. For Premier EZO and Premier Unlined
ONLY. Ref er ence VI.C.2. for procedure
to adjust downtravel stop screw (35).
v. Release all air pressure in actuator upper
casing (1). Repeat loading-unloading to
cycle the valve unit (AA, BA). Repeat
adjustments as necessary.
w. Completion to this point completes the
benchset range adjustment. Proceed to
the next subsection (VI.C.) to adjust 90°
travel stop, if necessary.
C. 90° Rotation Adjustment:
1. Units with ATO-FC (Reverse) Action:
a. Pressurize actuator (AA) to the higher
value of benchset range. This pressure
should cause 90° rotation as shown by
travel indicator (16).
1. Travel short of 90°. Hub of lower
L.H. rod end (9) may be touching on
downtravel stop screw’s (35) upper
end.
a. Loosen jam nut (45).
Product
Gap Between L.H. Rod End (9)
Model
and Downtravel Stop Screw (35)
Ranger QCT
1/8" ± 1/16" (3.0 mm ± 1.5 mm)
Premier EZO
1/16" ± 1/16" (1.5 mm ± 1.5 mm)
Premier Unlined
No gap; i.e. touching
