14
© Copyright by BIFFI Italia. All rights reserved.
“ICON2000”
instruction and operating manual
2.1 TYPE “A” COUPLING BLOCK
2.1.1 PREPARING THE BUSHING
With a compass key, unscrew the lower ring nut.
Extract the stem nut from the block housing.
The internal thrust bearing will remain at the bottom of the block housing.
Now the bore can be machined in the stem nut to suit coupling requirements.
The same procedure is also used for possible maintenance.
Important: Before re-mounting the stem nut, make sure the
coupling tolerances to the valve stem are correct. The
threaded stem nut must be checked either with a thread
gauge or with the stem of the valve to be motorised by
screwing it all along the valve stem without excessive
friction.
Section 618/1 chapt. C
Section 618/1
To Next Page
Loading...
