Fisher-Rosemount Design CV500, Инструкция по эксплуатации

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Design CV500
10
Figure 6. Packing Arrangements (Continued)
PTFE/COMPOSITION OR GRAPHITE ENVIROĆSEAL PACKING ARRANGEMENTS
C0774-1 / IL
manual. Complete the Adjusting Actuator Travel
procedure in this manual before installing the valve in
the pipeline. This is necessary due to the
measurements that must be made during the actuator
adjustment process.
8. When the control valve is being put back into
operation, check the packing follower for leakage, and
retighten the packing nuts as necessary.
Replacing Retainer, Seat Ring, and
Face Seals
This procedure is to be performed if the control valve
is not shutting off properly, if installing a different seat
ring, or if seat ring inspection is necessary. The
actuator and valve must be removed from the pipeline;
however, the actuator may remain mounted during this
procedure. Key numbers refer to figure 11 for 3
through 8-inch sizes and to figure 12 for 10 and
12-inch sizes unless otherwise indicated.
A retainer tool is required to remove the retainer
(key 5). If specifically ordered, a tool is supplied with
the valve; a tool can also be ordered individually by
referencing the tool part number as shown in key 33 of
the Parts List. If desired, a tool can be machined using
the dimensions shown in figure 7.
During assembly, handle the retainer, seat ring, and
face seals carefully. Critical areas that must be
protected are the threads and inner surface of the
retainer (key 5), the sealing surfaces of the face seals
(key 8), the face seal grooves in the seat ring (key 4),