CVS 1051 Series, Инструкция по эксплуатации

Страница: 8 / 20

Assembly continued,
9. Ensure that the warning nameplate (Key 27) is in
place and install the diaphragm (Key 25) and the
upper diaphragm casing (Key 26).
10. Install the cap screws and hex nuts (Keys 45 and
44). Tighten cap screws evenly using a
crisscross pattern to compress the spring, and
then secure the upper diaphragm casing.
11. Refer to the appropriate valve body instruction
manual for lever/valve shaft orientation marks,
and slide the lever (Key 33) into place. See
Figure 5 for correct lever operating clearance.
Clamp with the cap screw (Key 10).
12. Rotate the lever (Key 33) until it aligns with the
rod end bearing (Key 13). This connection can
be assisted by stroking the actuator off its up
travel stop using a regulated air source.
13. Apply a thread-locking compound to the threads
of the cap screw (Key 12).
14. Connect the lever (Key 33) and the rod end
bearing (Key 13) with the cap screw and hex
nuts (Keys 12 and 31). Tighten the cap screw to
the torque as recommended in Table 3).
15. If a valve positioner is being used with the
assembly, consult the appropriate manual for
positioner installation.
16. Coat the bearing surfaces of the hub (Key 30)
and the cover (Key 41) with a suitable lubricant.
Install the bushing (Key 40) and hub into the
cover and secure with the retaining ring (Key
36).
17. Install the travel indicator scale (Key 39) and
secure with self-tapping screws (Key 37).
18. Make note of the valve position and direction of
rotation and position the travel indicator (Key 38)
accordingly.
19. Replace the cover (Key 41) and secure with cap
screws and washers (Keys 8 and 9). If the holes
in the cover and housing (Key 17) do not align,
use a regulated air source to move the actuator
slightly off its up travel stop. If this does not
result in proper alignment, temporarily loosen the
cap screws (Key 32) and shift the housing
slightly. Do not stroke the actuator while the
cover is off.
20. Refer to the Adjustment section of this manual
for correct actuator turnbuckle adjustment.
Changing Actuator Mounting
Generally the actuator is positioned vertically in a
horizontal pipeline, however there are four possible
mounting styles and for possible positions for each
style. Refer to Figures 3 and 4.
*The size 70 Series 1052
must be externally supported if mounted horizontally due to the
weight.
Correct lever/valve shaft positioning is important in
ensuring proper valve action. Refer to the
appropriate valve body instruction manual.
Warning: The sudden release of process
fluid can cause personal injury or property
damage. Prior to starting adjustment
procedures:
• Isolate the valve from the process,
• Release the process pressure, and
• Vent the actuator loading pressure.
Style A is right-hand mounted and Style D is left-
hand mounted. In all other ways Styles A and D are
identical.
Style B is right-hand mounted, while Style C is left-
hand mounted. In all other ways Styles B and C are
identical.
Refer to the following procedure to convert from
Styles A and D to Styles B and C or vice versa, or to
change the mounting position. Key numbers refer to
Figures 7 & 8.
1. Remove the cover (Key 41) by unscrewing and
removing the cap screws and washers (Keys 8
and 9).
2. Unscrew cap screw (Key 12) and loosen cap
screw (Key 10).
Warning: Do not use a hammer to drive the lever
off the drive shaft. This could cause damage to
internal valve parts. On some valves, driving the
lever could move the valve ball and bearings away
from the centered position, resulting in damage to
valve parts as the valve is operated.
If using a tool to remove the lever is necessary,
use a wheel puller. Tapping the wheel puller
screw lightly to loosen the lever is permissible,
but excessive force could also result in damage to
valve parts and disruption of the centered position
of the valve disk and bearings.
3. If changing styles,
a. Remove the cap screws (Key 32) and the
actuator housing (Key 17) from the mounting
yoke (Key 35).
b. Rotate the housing 180 degrees while
maintaining the appropriate position (1, 2, 3
or 4) and place the actuator onto the
mounting yoke (Key 35).
4. If changing positions, remove cap screws (Key
32) and rotate the actuator housing to the
desired position.
8