CVS 1051 Series, Инструкция по эксплуатации

Страница: 7 / 20

Disassembly continued,
Warning: The diaphragm plate (Key 1) may
be lodged against the diaphragm rod (Key
22), preventing the spring compression from
being relieved as the cap screw (Key 24) is
being loosened. If this is the case, loosen the
cap screw (Key 24) one full turn, and then tap
the underside of the diaphragm head until it
follows the cap screw disassembly. Failure
to check for and rectify this situation prior to
removing the cap screw (Key 24) could cause
a sudden release of spring compression as
the cap screw is disengaged. This sudden
release could result in personal injury or
property damage.
11. Slowly remove the cap screw (Key 24) while
ensuring that the diaphragm head is following
the cap screw disassembly. The spring load will
be zero before the cap screw is completely
removed. The remaining parts of the assembly
can then be separated.
12. Unscrew the cap screws (Key 32) and remove
the actuator housing assembly (Key 17).
13. Unbolt the mounting yoke (Key 35) from the
valve body.
14. Push out the bushing (Key 34) from the
mounting yoke and examine for wear. Replace if
necessary.
Assembly
These instructions assume that the actuator was
completely disassembled. If the actuator was only
partially assembled, start the instructions at the
appropriate step. Refer to Figures 7 & 8 for Key
Numbers.
1. If the bushing (Key 34) was replaced, press in
the new bushing and ensure the end of the
bushing is flush with the bottom of the recess in
the mounting yoke (Key 35).
2. Slide the mounting yoke (Key 35) over the valve
shaft and secure it to the valve using the valve
mounting cap screws. Refer to Table 3 and to
the appropriate valve manual for bolting torques
on these cap screws.
Note: Exceeding the torque requirement may
result in unsafe operation of the actuator.
Refer to Table 3 for recommended bolting
torques.
3. Consult Figures 3 and 4 for the desired housing
orientation. Secure the housing to the yoke
using cap screws (Key 32).
4. Coat the thread of the cap screw (Key 24) as
well as the tapered end of the diaphragm rod
(Key 22) with an appropriate lubricant.
5. Assemble the following parts: diaphragm rod
(Key 22), spring seat (Key 19), spring (Key 21)
and diaphragm plate (Key 1), then secure with
the cap screw (Key 24). Tightening the cap
screw will compress the spring. Ensure that the
tapered end of the diaphragm rod is seated in
the corresponding hole in the diaphragm plate,
that the spring is seated in the spring seat, and
that the cap screw is tightened to the torque
specified in Table 3.
6. Install the hex nut (Key 18), turnbuckle (Key 16),
hex nut (Key 14) and rod end bearing (Key 13)
onto the diaphragm rod.
7. Ensure the travel stops (Key 43) are located as
shown in Figure 6.
8. Install the diaphragm plate and attached parts
into the actuator.
Figure 6: Travel Stop Orientation
7