Design 3024S Actuator
Instruction Manual
Form 5421
June 1999
4
CAUTION
The Type 3024S actuators are
designed to mount on
push-down-to-close valves. Do not
mount these actuators on any other
type of valve without first contacting
the Fisher sales office.
Actuator Mounting
The following procedure describes how to mount a
Type 3024S actuator on a push-down-to-close valve
so that the actuator stem and valve stem thread
engagement allows full travel and proper shutoff.
Refer to figure 5 for actuator dimensions. Key
numbers referenced in the following steps are shown
in figures 6, 7, 9 & 10.
1. Thread the stem hex nut (key 54/52) first and
then the connector (key 50) onto the valve stem and
run them down.
2. Push the valve stem down until the valve plug is
fully closed.
3. Carefully place the actuator with the flange (key
45) on the valve bonnet.
WARNING
When moving the actuator stem with
diaphragm loading pressure use
caution to keep hands and tools out of
the actuator stem travel path. Personal
injury and/or property damage is
possible if something is caught
between the actuator stem and other
control valve assembly parts.
CAUTION
Be sure that the length of the actuator
stem or the valve stem in the
connector (key 50 or 53) is equal to or
greater than the diameter of that stem.
In the following procedure, do not
rotate the valve plug while it is seated.
This may damage the seating surface
and thereby allow excessive leakage.
Also, during adjustment, use tools
carefully to avoid damaging the valve
stem. A damaged stem could cut the
packing and allow leakage.
4. Perform one of the following procedures as
appropriate:
For a Type 3024S Air-To-Close actuator with a
push-down-to-close valve:
a. Tighten the valve bonnet lock nut.
b. Adjust the travel: rotate the connector halves
(key 53 and 50) so that the distance between
them (with the valve on the seat and the travel
indicator-key 51 between the connectors) is equal
to the valve travel.
c. Pressurise the actuator slowly and adjust the
stem connector half (key 50) so the connecting
bolts will line up.
d. Tighten all bolts (key 55/56) and nuts (key
56/57).
e. Apply bench set pressure to the top of the
diaphragm and check the valve stem travel.
f. Tighten the valve stem hex nut (key 54/52)
against the stem connector (key 50).
For a Type 3024S Air-To-Open actuator with a
push-down-to-close valve:
a. Apply approximately 0.5 bar above the highest
setting of the bench set pressure to the bottom of
the diaphragm. This positions the actuator stem
(key 8) at the highest point.
b. Tighten the valve bonnet lock nut.
c. Adjust the travel: rotate the connector halves
(key 53 and 50) so that the distance between
them (with the plug on the seat and the travel
indicator key 51 between the connectors) is equal
to the valve travel.
d. Exhaust the actuator slowly and adjust the
stem connector half (key 50) so the connecting
bolts will line up.
e. Completely exhaust the actuator and tighten
all bolts (key 55/56) and nuts (key 56/57).
f. Apply approximately 0.5 bar above the highest
bench set pressure to the top of the diaphragm
and check the valve stem travel.
g. Tighten the valve stem hex nut (key 54/52)
against the stem connector (key 50).
