Instruction Manual
D102603X012
667NS Actuator
June 2018
2
Table 1. Fisher 667NS Specifications
SPECIFICATION
ACTUATOR SIZE
40
45
70
80
Nominal Effective Diaphragm Area
cm
2
445
677
1419
see table 5
Inch
2
69
105
220
see table 5
Yoke Boss Diameters
mm
71
71
90
5H
Inch
2‐13/16
2‐13/16
3‐9/16
5H
Acceptable Valve Stem Diameters
mm
12.7
12.7
19.1
25.4 & 31.8
Inch
1/2
1/2
3/4
1 & 1‐1/4
Maximum Allowable Output Thrust
(1)
N
12,015
30,371
42,720
88,110
Lb
2700
6825
9600
19,800
Maximum Travel
mm
38
51
76
76
Inch
1.5
2
3
3
Maximum Diaphragm Pressure to Stroke
Actuator
(2,3)
Bar
4.5
4.5
3.5
4.8
Psig
65
65
50
70
Maximum Excess Diaphragm Pressure
(2,3)
Bar
1.4
0.7
0.7
1.4
Psig
20
10
10
20
Maximum Casing Pressure for Actuator Sizing
(3)
Bar
4.8
4.5
3.4
4.9
Psig
70
65
50
70
Maximum Diaphragm Casing Pressure
(2,3)
Bar
6.2
5.2
4.1
5.5
Psig
90
75
60
80
Material Temperature Capabilities
(3)
-40 to 82
_
C (-40 to 180
_
F) with nitrile diaphragm
1. See also the Specifications portion of the Introduction section. Do not exceed maximum allowable valve stem load when applying maximum allowable thrust.
2. Maximum diaphragm casing pressure must not be exceeded and must not produce a force on the actuator stem greater than the maximum allowable actuator output thrust or the maxi
mum allowable stem load.
3. The pressure and temperature limitations in this manual, and any applicable code limitation, should not be exceeded.
Table 2. Diaphragm Casing Volumes, cm
3
(Inch
3
)
ACTUATOR
SIZE
CLEARANCE
VOLUME, cm
3
(INCH
3
)
TRAVEL, mm (INCH)
11 (0.4375)
16 (0.625)
19 (0.75)
29 (1.125)
38 (1.5)
51 (2)
76 (3)
40
934 (57)
1475 (90)
1704 (104)
1852 (113)
2327 (142)
2786 (170)
‐ ‐ ‐
‐ ‐ ‐
45
1556 (95)
‐ ‐ ‐
2786 (170)
2999 (183)
3720 (227)
4424 (270)
5408 (330)
‐ ‐ ‐
70
3490 (213)
5244 (320)
5948 (363)
6424 (392)
7833 (478)
9242 (564)
11,110 (678)
14,879 (908)
80
4818 (294)
‐ ‐ ‐
‐ ‐ ‐
‐ ‐ ‐
10,488 (640)
12,454 (760)
14,863 (907)
19,337 (1180)
Table 3. Actuator Stem Assembly Bolt Torque Values
ACTUATOR SIZE
TORQUE
N
S
m
Lbf
S
Ft
40
45
70
80
68
183
183
542
50
135
135
400
Table 4. Bonnet‐to‐Actuator Bolt Torque Values
ACTUATOR SIZE
BONNET‐ACTUATOR STUD BOLT TORQUE
N
S
m
Lbf
S
Ft
40
45
70
80
102
102
176
292
75
75
130
215
