Emerson Fisher GX Instruction Manual page 7

Instruction Manual
February 2009
ACTUATOR SIZE
225
225
750
750
750
750
1200
1. Only applicable to actuators with spring information on the nameplate (see figure 2).
Table 3. Fisher GX Maximum Rated Travel
NUMBER OF
ACTUATOR SIZE
CASING BOLTS
225
750
1200
Table 4. Body Nut (Key 7) Torque Requirements
VALVE SIZE
DN 15, 20, 25
(NPS 1/2, 3/4, 1)
DN 40 and DN 50
(NPS 1-1/2 and 2)
DN 80 (NPS 3)
DN 100 and DN 150
(NPS 4 and 6)
Table 5. Yoke/Extension Bonnet Nut (Key 46) Torque
Requirements (used on Extension Bonnet and Bellows
Bonnet constructions)
VALVE SIZE
DN 15, 20, 25, 40,
and 50 (NPS 1/2,
3/4, 1, 1-1/2, and 2)
DN 80 and 100
(NPS 3 and 4)
Table 2. Actuator Spring Configuration Based on Minimum Supply Pressure
TRAVEL
STEM MATERIAL
mm
S20910, N05500
20
S31603
S31803, N10665,
20
N06022
S20910, N05500
20
S31603
S31803, N10665,
20
N06022
S20910, N05500
40
S31603
S31803, N10665,
40
N06022
S20910, N05500
40 or 60
S31603
TRAVEL
mm
6 20
10 20 or 40
16 40 or 60
TORQUE
NSm lbfSft
38.2 28.2
65.5 48.3
157 116
284 209
TORQUE
NSm lbfSft
65.5 48.3
157 116
GX Valve and Actuator
MINIMUM SUPPLY
PRESSURE
Air-to-Open
4 bar (58 psi)
3 bar (44 psi)
2 bar (29 psi)
4 bar (58 psi)
3 bar (44 psi)
2 bar (29 psi)
4 bar (58 psi)
3 bar (44 psi)
2 bar (29 psi)
4 bar (58 psi)
3 bar (44 psi)
2 bar (29 psi)
4 bar (58 psi)
3 bar (44 psi)
2 bar (29 psi)
4 bar (58 psi)
3 bar (44 psi)
2 bar (29 psi)
4 bar (58 psi)
3 bar (44 psi)
2 bar (29 psi)
Actuator Assembly For Air-to-Open
Constructions (or to Change Action to
Air-to-Open - see figure 18 or 19)
1. Install the diaphragm (key 10) on the diaphragm
plate (key 11). Insert the cap screw (key 14) through
the actuator spacer (key 13) and place this assembly
through the diaphragm/diaphragm plate assembly.
2. Place the washer (key 15) over the center hole of
the diaphragm, so that the convex part of the washer
is facing down toward the diaphragm.
3. Screw the actuator rod (key 22) onto the cap
screw (key 14) and torque to 65.5 NSm (48.3 lbfSft).
Install the actuator stem/diaphragm assembly back
into the actuator yoke (key 8).
4. Place the actuator springs (key 12 and/or 82)
onto the spring locators in the diaphragm plate
(key 11). See figure 3 and table 2 for proper spring
quantity and arrangement.
D If the nameplate does not contain spring
information, use the same quantity and arrangement
as originally installed.
5. Install the upper diaphragm casing (key 9) so that
the ribs on the top of the upper diaphragm casing
are perpendicular with the yoke legs.
(1)
SPRING CONFIGURATION
Air-to-Close
A6 A3
A4 A3
A3 A2
A6 A3
A4 A3
A3 A2
B6 B4
B6 B4
B4 B4
B4 B4
B4 B4
B4 B4
C12 C6
C8 C3
C4 C3
C8 C6
C8 C3
C4 C3
D15 D15
D15 D15
N/A N/A
7