Installation Instructions

Instruction Manual
D103048X012
3024C Actuator
May 2011
2
Table 1. Specifications
Specification
Actuator Size
30 30E 34 34E 40 40E 45 45E
Nominal Effective Area See tables 2 and 3.
Maximum Operating Pressure
to Diaphragm
Bar 6
psig 87
Maximum Travel
mm 16 ‐ ‐ ‐ 16 ‐ ‐ ‐ 32 ‐ ‐ ‐ 32 ‐ ‐ ‐
Inch ‐ ‐ ‐ 0.75 ‐ ‐ ‐ 0.75 ‐ ‐ ‐ 2 ‐ ‐ ‐ 2
Yoke Boss Diameter
Inch
(mm)
2‐1/8
(54 mm)
2‐1/8
(54 mm)
2‐1/8
(54 mm)
2‐1/8
(54 mm)
2‐13/16
(71 mm)
2‐13/16
(71 mm)
2‐13/16
(71 mm)
2‐13/16
(71mm)
Valve Stem Connector Thread
mm M12 x 1.75 ‐ ‐ ‐ M12 x 1.75 ‐ ‐ ‐ M16 x 2 ‐ ‐ ‐ M16 x 2 ‐ ‐ ‐
Inch ‐ ‐ ‐ 3/8‐24 ‐ ‐ ‐ 3/8‐24 ‐ ‐ ‐ 1/2‐20 ‐ ‐ ‐ 1/2‐20
Temperature Range
_C Nitrile diaphragm and steel studs and nuts: -40 to +82
_F Nitrile diaphragm and steel studs and nuts: -40 to +180
Pressure Connections Inch 1/4 – 18 NPT
Maximum Approximate
Weight (without handwheel)
kg 9.5 9.5 18.0 18.0 19.5 21.5 33.5 35.5
lb 20.9 20.9 39.7 39.7 43.0 47.4 73.9 78.3
Maximum Approximate
Weight (with handwheel)
kg 16.5 16.5 25.0 25.0 26.5 28.5 40.5 42.5
lb 36.4 36.4 55.1 55.1 58.4 62.8 89.3 93.7
Figure 2. Schematic of Fisher 3024C
1Q57489
AIR‐TO‐CLOSE (ATC)
AIR‐TO‐OPEN (ATO)
AIR PUSHES
STEM DOWN
SPRINGS PUSH
STEM DOWN
SPRINGS LIFT
STEM UP
STEM
STEM SEAL
STEM
AIR LIFTS
STEM UP
Figure 3. Fisher 3024C Actuator Nameplate
1Q574760
Description
The 3024C direct acting (extends stem/air‐to‐close) actuator (figure 8) and the reverse acting (retracts
stem/air‐to‐open) actuator (figure 9) are spring‐opposed pneumatic diaphragm actuators that provide automatic
throttling or on‐off operation of sliding‐stem control valves.
The actuator will position the valve plug in response to varying pneumatic loading pressure on the actuator
diaphragm. Figure 2 shows the operation of an ATC (air‐to‐close) actuator and an ATO (air‐to‐open) actuator.
The 3024C ATC (air‐to‐close) actuator springs are located under the diaphragm plate and they fully retract the
actuator stem for fail action upon loss of diaphragm casing pressure. The 3024C ATO (air‐to‐open) actuator springs
are located on top of the diaphragm plate and they fully extend the actuator stem upon loss of diaphragm casing
pressure. The actuator is mounted on the valve by means of a cast yoke.
The 3024C can be equipped with a side mounted handwheel if required (figure 10). An adjustable up travel stop can
also be fitted (figures 11 and 12).