4 Operation
Study the maintenance instructions carefully before replacing worn parts. - See 5.1 General maintenance
4.2
Fault finding and repair
Problem
Cause/result
Repair
Leakage at the leakage detection
pipe (88)
-
Particles between valve seats and
plug seals (56/74)
-
Worn/product affected plug seal
rings (56/74)
-
Plug not assembled correctly
-
Remove the particles
-
Check the plug seals
-
Replace the plug seals
-
Change rubber grade
-
Assemble plug, see step 3,
section 5.5 Assembly of valve
Leakage at sealing element (48)/
upper plug (94)
Worn/product affected o-rings/lip
seal (38/39/46/49)
-
Replace the o-rings/lip seal
-
Change rubber grade
-
Clean and if necessary replace guide
ring (45)
Leakage at clamp (64) and (65)
-
Too old/product affected o-rings
(76 and 47) valve body
-
Loose clamp (64) or (65)
-
Replace the o-rings
-
Change rubber grade
-
Tighten the clamp (max. 10 Nm)
CIP leakage
Leakage at spindle clamp (43)
Worn o-rings (40/67)
Damaged o-ring (39)
Worn/product affected lip seal (57)
Replace the o-rings
-
Replace the o-ring
-
Replace the plug seals
-
Change rubber grade
Tank plug not returning to closed
position
-
Wrong rubber grade
-
Wrongly fitted gasket
-
Mounted incorrectly (see 3.4 Welding)
-
Change rubber grade
-
Fit new gasket correctly
-
Correct installation
Plug returns with uneven movements
(slip/stick effect)
-
Wrong rubber grade
-
Wrongly fitted gasket
-
Mounted incorrectly (see 3.4 Welding)
-
Change rubber grade
-
Fit new gasket correctly
-
Correct installation
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