27
Conversion of control function
Type 2000, 2002, 2012
9.4 Conversion from ow above the seat to ow below
the seat
DANGER!
Danger – high pressure!
▶ Turnothepressureandventthelinesbeforelooseninglinesorvalves.
Risk of injury from improper maintenance!
▶ Maintenance may be performed by authorized technicians only!
▶ Toscrewonorunscrewvalvebodyoractuator,useanopen-endwrench,neverapipewrench.
▶ Observetighteningtorques.
Requiredparts:
Item Description
28,29 Pressuresprings(1or2pieces)
→ Mount valve
1
on the body.
CAUTION!
Danger through taut springs!
▶ Carefully open piston actuator!
→ Release cover
31
withspecialwrenchuntilthespringsarecompletelyrelaxed,holdinguptheactuator
body
12
againstthehexagon.
Forinformationaboutthespecialwrench,seeChapter“10Installationtools”.
→ Removeand/orinsertpressuresprings
28
29
dependingonactuator.
→ ForactuatorsizeC,D,EandF:Removepressurespringsandinsertnew,strongersprings.
→ ForactuatorsizeG,H:Installnewouterspring
29
inadditiontotheexistinginnerspring
28
.
→ Mount cover
31
andscrewtightlywithspecialwrench.
→ Check the valve for function and leaks.
Notechangeddirectionofowandchangedpressurerange!