Emerson Fisher 3024C Data Sheet

3024C Actuator

D103051X012

Fisherr 3024C Diaphragm Actuator

The 3024C actuator is a compact spring opposed
pneumatic diaphragm actuator incorporating a cast
yoke mounting and is suitable for general purpose
actuation of globe valves. It will position the valve plug
in response to varying controller or valve positioner
pneumatic output signals applied to the actuator
diaphragm. The 3024C actuator can be assembled as
either direct-acting or reverse-acting and provides
dependable and on-off or throttling operation of
automatic control valves.

Product Bulletin

61.1:3024C

March 2012

Features

 Application Versatility–With eight different

configurations available, there is an actuator size to
meet your needs. Multi-spring combinations allow
for accurate selection of actuator thrust and valve
travel.

 Reversible Action–The simple design allows the

change of action from direct to reverse acting
without the requirement for extra parts. Change of
action can be easily made in the field.

 High Thrust Capability–The moulded diaphragm

and high strength casings allow for a maximum
casing pressure of 6 bar, enabling a high stem thrust
for a given size diaphragm.

 Positive Connections–Split block stem connection

provides a solid transfer of motion while allowing
easy mounting and no linkages that create lost
motion or inaccurate valve positioning.

W8488

 Rugged Construction–The cast steel yoke and

 Severe Temperature Applications–Through careful

 Compact Design–The compact size minimizes

3024C Actuator Mounted on Fisher Valve

heavydutysteelcasingsprovidestability,
protection against corrosion, longevity, and
resistance against misuse.

selection of construction materials, this actuator
canbeusedforawiderangeofambient
temperature conditions from a minimum of -40_C
to a maximum of +82_C.

weight and space needed.

Available Configurations

Refer to figure 1.

www.Fisher.com

Product Bulletin

61.1:3024C
March 2012

3024C Actuator

D103051X012

Direct Action

With the direct action mode on the 3024C actuator,
applying air pressure to the upper side of the
diaphragm forces the actuator stem downward while,
atthesametime,compressingthespringsonthe
underside of the diaphragm. Refer to figure 1. When
this pressure is reduced, the opposing spring force
moves the actuator stem upwards. Should the loading
pressure fail, the springs force the stem to the extreme
upward position, thereby providing fail-open action for
apush-down-to-closevalve.

Reverse Action

With the reverse action mode, air is applied on the
underside of the diaphragm while opposing spring
force is on the top side. Increasing air pressure will
force the stem upwards. When the loading pressure is
reduced, the stem moves downwards. Should loading
pressure fail, the springs force the stem to the extreme
downward position, thereby providing fail-closed
action for a push-down-to-close valve.

Accessories

Handwheels

An optional side-mounted handwheel can be fitted to
all sizes of actuator with travel up to 32 mm (1.25 inch)
and where the maximum actuator thrust is less than
14,000 N (3150 lbf). These handwheels provide a
robust method of manually operating the valve in an
emergency o r when there is a loss of instrument air.
Refer to figures 2 and 3 and table 1 for details.

Note, a side-mounted handwheel cannot be fitted on
the sizes 45 and 45E actuator if an adjustable travel
stop is fitted as well.

When mounted on a direct action actuator, turning
the handwheel clockwise always moves the stem
downwards. When mounted on a reverse action
actuator, turning the handwheel clockwise moves the
stem upwards. Disengagement of the handwheel to
enable automatic operation is simply accomplished by
rewinding the handwheel.

Valve Compatibility

With the availability of both metric and imperial
threaded stem connectors, the 3024C can be used
with a range of valve body assemblies such as the
Fisher metric 1018S construction or imperial easy-et
and RSS valve body constructions, along with others.

Table 1. Handwheel Specifications

ACTUATOR

SIZE

30 and 30E 200 7.87 0.24 6.1 179 40 5000 1125

34, 34E, 40,

and 40E

45 and 45E 250 9.84 0.21 5.5 400 90 14000 3150

1. Tangential handwheel force required to produce the handwheel output force
shown.

2. Brass operating nut and stainless steel screw.

HANDWHEEL

DIAMETER

mm Inch mm Inch N lbs N lbs

250 9.84 0.21 5.4 286 64 10000 2250

TURNS PER

mm/INCH

TRAVEL

RIM FORCE

(1, 2)

Contents

Features 1.....................................

Available Configurations 1.......................

Direct Action 2................................

Reverse Action 2..............................

Valve Compatibility 2..........................

Accessories 2..................................

Handwheels 2................................

HANDWHEEL

OUTPUT

FORCE

Adjustable Travel Stops

Top mounted adjustable up travel stops are available
for all actuators from size 30 to 40E. For the larger sizes
45 and 45E, an adjustable stop can be fitted to the
actuator stem below the diaphragm casings. Both
constructions give total variable adjustment of the
travel of the actuator by limiting movement in the
upward direction. Refer to figures 4 and 5.

Others

Accessories such as transducers, positioners, position
transmitters, air relays, volume boosters, switching
valves, lockup valves, limit switches, and solenoid
valves are also available for actuator mounting. They
are described in separate publications. Contact your
Emerson Process Management sales office for details.

Adjustable Travel Stops 2.......................

Others 2.....................................

Construction Materials 6.........................

General S pecifications 6.........................

Actuator Dimensions 9..........................

Ordering Information 9..........................

2

3024C Actuator

D103051X012

Figure 1. Typical Applications

Product Bulletin

61.1:3024C

March 2012

W8466-1 W8495-1

3024C (AIR RETRACTS STEM)

W8496-1

3024C (AIR EXTENDS STEM)

3024C FITTED WITH A SIDE-MOUNTED HANDWHEEL

3

Product Bulletin

61.1:3024C
March 2012

Figure 2. Side-Mounted Handwheel with Air-Extends-Stem Actuator

3024C Actuator

D103051X012

1Q57490

Figure 3. Side-Mounted Handwheel with Air-Retracts-Stem Actuator

1Q57490

4