6-5
6-3 Cleaning the Flapper
If the flapper is contaminated by instrumentation air, clean it as described below.
Cautions
If air pressure is supplied to the device, the back pressure of the nozzle changes
after the flapper is cleaned, and therefore, the valve opening suddenly changes.
Perform cleaning under conditions where the sudden move of the valve will not
injure people or disturb plant operation.
Step Work
1 Remove the three screws from the pilot relay cover.
2
Prepare a piece of 0.2-mm thick paper. A typical business card
is appropriate.
3
Chip dirt that has accumulated in the space between the nozzle
and flapper in the EPM away with the paper.
4
After cleaning, attach the pilot relay cover to the main unit with
the three screws.
Figure 6-2 Structure
Nozzle flapper
To Next Page
Loading...
Need help?
General
