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VALVE STEM
VALVE SIZE,
DIAMETER
INCH
INCH
mm
Inch
19.0
3/4
2
38.1
1-1/2
3
19.0
3/4
19.0
3/4
4
25.4
1
69.8
2-3/4
6
31.7
1-1/4
1. For seal ring and piston ring constructions. For stem-balanced construction, use port area of 11.4 cm
2. Stem-balanced construction has 31.8 mm (1-1/4 inch) valve stem connection.
3. Stem-balanced construction has 50.8 mm (2 inch) valve stem connection.
VALVE SIZE,
VALVE SIZE
TRIM
INCH
INCH
mm
Class
2
38
2500
Class
3
50.8
2500
Class
4
64
2500
1. Consult the factory for larger yoke boss sizes.
2. This column lists the percent reduction of published maximum C
YOKE BOSS
VALVE SIZE,
DIAMETER
INCH
INCH
mm
91
2
2
127
3
91
91 or 127
4
4
178
6
127
CAUTION
When ordered, the valve configuration
and construction materials were se-
lected to meet particular pressure, pres-
sure drop, temperature, and controlled
fluid conditions. Do not apply any other
conditions to the valve without first con-
tacting your Fisher Controls sales office
or sales representative.
Trim parts, seals, and gaskets may be
damaged if post-weld buttweld heat
treatment is applied to valve areas other
than the end connections. If heat treat-
ment will be performed over the entire
valve body, seals and gaskets must be
removed. Valve plug seals may be re-
Table 2. Additional Valve Specifications
YOKE BOSS
TRAVEL
DIAMETER
mm
Inch
mm
91
3-9/16
38
(2)
127
5
91
3-9/16
51
91
3-9/16
127
5
64
(3)
178
7
127
5 & 5H
102
Table 3. Additional Valve Specifications for TSO (Tight Shutoff) Trim
MAXIMUM
MAXIMUM
YOKE BOSS
YOKE BOSS
(1)
TRAVEL
SIZE
Inch
mm
Inch
91
3-9/16
1-1/2
127
5
2
91
3-9/16
91
3-9/16
2-1/2
127
5
of the trim listed in the TRIM column.
V
Table 4. Approximate Weights
TOTAL
Inch
Kg
3-9/16
167
5
182
3-9/16
301
3-9/16 or 5
532
7
554
5 or 5H
1512
PORT
DIAMETER
Inch
mm
Inch
1-1/2
38.1
1-1/2
2
55.6
2-3/16
2-1/2
69.9
2-3/4
4
111.1
4-3/8
2
2
(1.77 inch
) for 2 inch valve and 38.3 cm
PORT DIAMETER
Nominal
Actual TSO
mm
Inch
mm
38.1
1-1/2
38.1
55.6
2-3/16
55.6
69.9
2-3/4
69.9
VALVE PLUG
BONNET
ONLY
ASSEMBLY
Lb
Kg
Lb
Kg
369
44
98
401
59
130
664
47
103
1172
127
280
12
1222
150
330
12
3334
240
530
44
used; gaskets that are removed must not
be reused. Use new gaskets upon as-
sembly.
If hoisting the valve, be sure the hoist
used is capable of handling the weight
of the valve and actuator. Also, be sure
the sling does not damage the painted
surfaces, is positioned securely to pre-
vent swinging or slipping, and is posi-
tioned so as to cause no damage to tub-
ing or any accessories.
1. The valve must be installed so that the actuator is
positioned vertically above the valve body. This posi-
tion reduces the possibility of uneven wear on the
valve plug. Also, this position facilitates easier mainte-
nance and prevents stem binding due to actuator
weight.
Design CAV4
PORT
CIRCUMFERENCE
mm
Inch
119.6
4.71
174.5
6.87
219.4
8.64
349.2
13.75
2
(5.94 inch
PORT
PORT
CIRCUMFERENCE
Inch
mm
Inch
1-1/2
119.6
4.71
2-3/16
174.8
6.88
2-3/4
219.4
8.64
LOWER CAGE
AND STEM
ASSEMBLY
Lb
Kg
Lb
3
7
12
27
3
7
12
27
5
12
14
30
27
37
82
27
37
82
98
84
186
UNBALANCE
(1)
AREA
2
2
mm
Inch
4.3
0.17
6.6
0.26
8.1
0.32
12.9
0.51
2
) for 4 inch valve.
C
V
V
REDUCTION
REDUCTION
AT 100%
AT 100%
(2)
TRAVEL
0%
0%
0%
UPPER
CAGE
Kg
Lb
4
9
4
9
7
16
12
27
12
27
54
120
3
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