wT 1207/11
Page 8
Maintenance and Repair Instructions for KLINGER PISTON VALVES
(KVN series)
Klinger piston valves are easy to repair using simple assembly and dismantling tools. The valve does
not
have to be
removed
, but the line system must be
depressurised
and
emptied
.
We recommend the following procedure for dismantling:
•
Depressurise and empty the system
•
Open the valve fully
•
Unscrew the bonnet fastening nuts (Pos.10),
•
Turn the hand wheel (Pos.3) clockwise (closing direction) (bonnet rises out of body)
•
Turn bonnet (Pos.2) slightly until the flange rests against the stud bolt face (Pos.12) and turn hand
wheel anti-clockwise (opening direction) until piston (Pos.7) is completely free of valve ring
(Pos.9), (see Fig.1)
•
Remove bonnet together with hand wheel, and stem- set
•
Remove upper valve ring (Pos.9) and lantern bush Fig.2*) using lantern bush extractor
•
Remove bottom valve ring (Pos.9) with ring extractor hook
Fig. 3*)
*) Be careful not to damage the bore of the valve body
•
Clean the valve body bore and valve ring seat, if necessary with fine sandpaper
Note:
Do not sandblast
