Adjusting The Actuator Travel - Emerson Fisher Control-Disk NPS 14 CL150 Instruction Manual

Control-Disk NPS 14-36
April 2011
A Control-Disk valve is normally shipped as part of an assembly with an actuator and other accessories such as a valve
positioner. If the valve and actuator have been purchased separately or if the actuator has been removed for
maintenance, properly mount the actuator and adjust valve/actuator travel before inserting the valve into the line.
CAUTION
Damage to the disk will occur if any pipe flanges or piping connected to the valve interfere with the disk rotation path. Be
certain to align the valve accurately to avoid contact between the disk (key 2) and the flanges.
Figure 2. Available Seal Configurations
GRAPHITE
GASKET
VALVE DISK
B2313-3
NOTES:
1 THIS UNIDIRECTIONAL SEAL MUST BE INSTALLED SO THAT THE RETAINING RING IS DOWNSTREAM FROM THE HIGH PRESSURE SIDE OF THE VALVE AT
SHUTOFF, AS SHOWN.
2
FOR THIS BIDIRECTIONAL SEAL, THE "PREFERRED" VALVE ORIENTATION PLACES THE RETAINING RING DOWNSTREAM FROM THE HIGH PRESSURE SIDE
OF THE VALVE AT SHUTOFF.

Adjusting the Actuator Travel

Key number locations are shown in figure 9, unless otherwise noted.
1. Adjust the actuator to bring the disk to the fully closed position at the end of the actuator stroke. To determine the
fully closed disk position, measure the distances between the disk face and the seal retainer face at the top and
bottom of the valve (X1 and X2) as shown in figure 3. Adjust the actuator to rotate the disk slightly until the two
measurements are within 0.8 mm (0.032 inch) of each other. Refer to the appropriate actuator instruction manual
for assistance.
2. Before installing the valve/actuator assembly in the process line, cycle the valve several times to be sure the valve
disk returns to the proper position.
6
VALVE DISK
1
Instruction Manual
2
VALVE DISK
D103545X012