wT 1255/12
Page 17
11.4
Valve Ring Installation and Assembly
!
CAUTION
All individual parts, especially the sealing surfaces, must be thoroughly
inspected prior to assembly. Damaged parts must be replaced with new
parts. Visible dirt on the machined parts must be removed.
!
CAUTION
Special care must be taken to avoid the KX-GT rings being inserted into
the bore if they become jammed with the mounting tool.
»
Installation of the lower valve ring into the body by means of KX-GT assembly tool.
Do not use any grease or lubricant (DN 65/ 80/ 100 see Fig. 4, DN 125/ 150 / 200
see Fig. 5)
»
Insertion of the cleaned lantern bush. Ensure that no lantern bush root face rests on
the valve output side in order to achieve an optimized K
v
-value
»
Installation of the upper valve ring by means of KX-GT assembly tool. Note that no
grease or lubricant may be used here, either
»
Insert the thrust piece (Pos. 19)
»
Press in the valve ring (Pos. 16) into the body’s bore with assembly tools
»
Take the bonnet and screw out spindle until it recedes no further (turn handwheel
left)
»
Position bonnet (Pos. 2) on the valve body, after thorough lubrication of the neck of
the bonnet. Hammer it down with a plastic hammer until there is enough
supernatant of the stud bolt (Pos. 25) above the bonnet flange for the screwing of
the bonnet securing nuts (Pos. 27)
»
Fit belleville washers (Pos. 33) and screw on hex nuts (Pos. 27) with a few
convolutions
»
Now fully close and reopen valve (during the opening process the bonnet recedes
into the body)
»
Retighten hex nuts
»
Now fully close valve (turn handwheel right)
»
Tighten hex nuts in accordance with tightening torques provided in table
»
Function test
11.5
Standard Lubricants
The standard lubricant used to lubricate the thread in piston valves has the designation
"GLEIT-µ HP 506 Hochleistungspaste".
Assembly tool
Figure 4
Figure 5
Assembly tool