Design 3024S Actuator
Instruction Manual
Form 5421
June 1999
7
For a Type 3024S Air-To-Close & Air-to-Open:
4. Install the upper diaphragm casing (key 16) using
the long cap screws (key 21) and hex nuts (key 20)
first. Then secure with cap-screws (key 19) and hex
nuts (key 20). Be sure the supply connection is
located directly above the vent in the lower
diaphragm. Fit the plastic hose (key 22) over the cap
screws (key 21).
Note
Be sure to use the long cap screws
(key 21), first installing them on the
opposite sides of the diaphragm
casing. Tighten them evenly, using a
crisscross pattern to ensure a proper
seal.
5. Mount the actuator on the valve in accordance
with the Installation procedures.
Changing Actuator Action
The Actuator can be changed from a Type 3024S
ATO to a 3024 ATC or vice versa by removing the
pressure plate, diaphragm, O-ring, diaphragm plate,
hex nut, springs, spring locator, self tapping screws
and vent assembly (key 10, 11, 12, 13, 14, 15, 17,
18 and 23) and installing them for appropriate action.
See figures 6, 7, 9 and 10. For hex nut or travel stop
(key 14) and pressure plate (key 10) selection refer
to parts list. Follow the procedures in the Actuator
Mounting section and the Travel Adjustment section
for connection to the valve.
Side-Mounted Handwheel
A side-mounted handwheel assembly (figure 4) is
usually used as a manual operator. When mounted
on an ATC type 3024S actuator, turning the
handwheel clockwise always closes the valve. When
mounted on an ATO actuator, turning the handwheel
clockwise always opens the valve, A lever (key 49,
figure 12) on the handwheel assembly opens or
closes the valve by moving the valve stem.
Instructions are given below for complete
disassembly and assembly. Perform the
disassembly only as far as necessary to accomplish
the required maintenance; then begin the assembly
at the appropriate step.
Refer to figure 12 for key numbers.
Disassembly
1. If desired, the handwheel assembly can be
removed from the actuator leg post. To do this,
remove the hex nuts (key 62) and back plates (key
64) from the U-bolts (key 61) that hold the assembly
to the leg-post.
2. Loosen the lock (key 63) that secures the drive
screw assembly (key 51).
3. Remove the retaining ring (key 58) and screw out
the drive screw assembly (key 51).
4. Remove the retainer ring (key 56) and drive out
the pivot pin (key 52).
5. Remove the bushings (key 55) from the body
(key 48).
6. There is a cap screw (key 59), hex nut (key 60),
and spacer (key 53) that hold the two levers (key 49)
together. Remove the cap screw and hex nut and
the two levers can be separated in order to remove
the operating nut (key 50).
Assembly
1. Assemble the operating nut (key 50), the two
levers (key 49), and the spacer (key 53) using the
cap screw (key 59) and hex nut (key 60).
2. Install the bushings (key 55) in the body (key 48).
3. Attach the levers (key 49) to the body (key 48)
using the pivot pin (key 52) and the retaining ring
(key 56).
4. Apply lubricant Lubriplate MAG-1 or equivalent to
the drive screw assembly (key 51) and screw it on to
the operating nut (key 50).
5. Install the retaining ring (key 58. to secure the
collar to the body (key 48).
6. If the handwheel assembly was removed from the
actuator leg posts, position the U-bolts (key 61),
back plate (key 64) and handwheel body (key 48) to
the actuator leg posts as shown in figures 3 & 12.
Tighten the hex nuts (key 62) to 19 N
S
m (14 lbf
S
ft).
Clearance between the lower diaphragm casing and
the handwheel body are shown in figure 4. With the
actuator fully open the distance between the lower
face of the actuator stem connector and the actuator
flange should be shown in figure 4.
