Installation - Fisher 128-PQC Instruction Manual

FLOWING FLOWING
PRESSURE
ACTUATOR
SEATING SEATING
ACTION ACTION
TENDS TO:
Open valve
Spring S ring
closes valve
Close valve
Metal
Spring
Close valve
opens valve
Open valve
S ring Spring
closes valve
Close valve
Soft
Spring
Close valve
opens valve
24B1860-B / DOC

Installation

WARNING
To avoid personal injury or property
damage resulting from the sudden re-
lease of pressure, do not install the
valve assembly where service condi-
tions could exceed the limits given in
this manual or on the appropriate name-
plates. The leakoff and spring case
vents must be kept open. Avoid danger
Table 3. Maximum Allowable Shutoff Pressure Drops
PORT PORT
DIAMETER
0 to 20 Psig (0 or
1.4 Bar) Actuator 1.4 Bar) Actuator
DROP DROP
Springs Required)
Inches Inches mm mm
1/4 6.4 1510
3/8 9.5
1/2 12.7
3/4 19.1
1/4 6.4
3/8 9.5 1130
1/2 12.7 1330
3/4 19.1 2030
1/4 6.4
3/8 9.5
1/2 12.7
3/4 19.1 1400
1/4 6.4 1000
3/8 9.5
1/2 12.7
3/4 19.1
1/4 6.4
3/8 9.5 1000
1/2 12.7 1000
3/4 19.1 1000
1/4 6.4
3/8 9.5
1/2 12.7
3/4 19.1 1000
Figure 2. Typical Nameplate
CADMIUM COLORED MAIN
SPRING 14A8831X012
0 to 35 Psig (0 or
2.4 Bar) Actuator 2.4 Bar) Actuator
Input Signal (2 Input Signal (4
Springs Required)
Psi Bar Psi
104 3370
520 36 1340
220 15 690
30 2.1 240
940 65 1860
78 2450
92 2920
140 3600
170 12 350
530 36 610
540 37 1150
96 2910
69 1000
710 49 1000
400 28 830
160 11 350
940 65 1000
69 1000
69 1000
69 1000
560 39 660
480 33 960
540 37 1000
69 1000
of fire or explosion from venting of flam-
mable or otherwise hazardous fluid into
a closed or poorly vented location by
providing adequate ventilation.
1. Before installing the valve, inspect the valve body
and associated equipment for any damage and for any
foreign material.
2. The control valve may be installed in any orienta-
tion. However, the normal method is with the actuator
above the valve, especially for an angle configuration.
128-PQC
RED MAIN SPRING 14A9077X012
0 to 20 Psig (0 or
1.4 Bar) Actuator 1.4 Bar) Actuator
Input Signal (2
Springs Required)
Bar Psi Bar
232 3380 233
92 1340 92
47 700 48
16 240 16
128 1370 94
169 1540 106
201 1710 118
248 2320 160
24
42
Valve will not shut off with this
79 combination of spring and application
200
69 1000 69
69 1000 69
57 830 57
24 360 25
69 1000 69
69 1000 69
69 1000 69
69 1000 69
45
66 Valve will not shut off with this
69 combination of spring and application
69
0 to 35 Psig (0 or
2.4 Bar) Actuator 2.4 Bar) Actuator
Input Signal (4
Springs Required)
Psi Bar
3600 248
3120 215
1720 118
710 49
2920 201
3300 227
3600 248
3600 248
1000 69
1000 69
1000 69
790 54
1000 69
1000 69
1000 69
1000 69
3