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4 Operation
The valve is adjusted and tested before delivery.
Study the instructions carefully and pay special attention to the warnings!
Pay attention to possible faults.
The items refer to the parts list and service kits section.
4.2
Troubleshooting and repair
NOTE
Study the maintenance instructions carefully before replacing worn parts.
Problem
Cause/result
Remedy
Leakage between sealing element (79)
and lower plug (75)
Worn/damaged O-rings/ lip seal
(76/77/78)
-
Replace the O-rings/lip seal
-
Change rubber grade
-
Lubricate correctly
Leakage at the leakage outlet
-
Particles between valve seats and plug
seals (56/74)
-
Worn/damaged 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 2, section
5.5 Valve assembly
Leakage at sealing element (48)/upper
plug (55)
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)
-
O-rings (76 and 47) too old/damaged
(and 52 if clamped valve body)
-
Loose clamp (64)
-
Replace the O-rings
-
Change rubber grade
-
Tighten the clamp
CIP leakage
Worn O-rings (40/67/71)
Replace the O-rings
Leakage at spindle clamp (43)
Damaged O-ring (39) Worn/product
affected lip seal (57) or spray nozzle (58)
-
Replace the O-ring
-
Replace the plug seals
-
Change rubber grade
Lower plug not returning to closed
position
-
Wrong rubber grade
-
Wrongly fitted gasket
-
Mounted incorrectly (see section 2.3)
-
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 section 2.3)
-
Change rubber grade
-
Fit new gasket correctly
-
Correct installation
16
Summary of Contents for Unique Mixproof LP
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