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ALFA LAVAL UNIQUE SSV STANDARD VALVE INSTRUCTION MANUAL—REV 3/19
4 Operation
Pay attention to possible faults. Study the instructions carefully.
The items refer to the parts list and service kits section.
4.2 Troubleshooting
N
NO
OTTE
E!!
Study the maintenance instructions carefully before replacing worn parts. - See section 5.1 General maintenance
P
Prroobblleem
m
C
Caauussee//rreessuulltt
R
Reeppaaiirr
External product leakage
Worn or product affected lip
seal and/or O-ring
- Replace the seals
- Replace with seals of a
different rubber grade
Internal product leakage
- Worn or product affected
plug seal
- Replace the seal
- Replace with a seal of a
different rubber grade
- Product deposits on
the seat and/or plug
- Frequent cleaning
- Product pressure exceeds
actuator specification
- Replace with a high pressure actuator
- Use auxiliary air on the spring side
(do not exceed 43.5 PSI (3 bar)) Alfa
Laval article number = 9611996094 .
See section 2.3 Safety precautions
and section 3.2 General installation,
step 4.
- Reduce product pressure
Water hammer
The flow direction is the
same as the closing direction
- The flow direction should be
against the closing direction.
- Throttle air release of solenoid in
top unit
The valve does not
open/close
Product pressure exceeds
actuator specification
- Replace with a high pressure actuator
- Reduce product pressure
- Use auxiliary air on the spring side.
Always use the pressure relief fittings
43.5 PSI (3 bar) on support side.
Alfa Laval article number =
9611996094
If marked with a danger warning, do N
NO
OTT attempt to cut the actuator open, due to spring under load.
DO NOT DISASSEMBLE
kg
!
Do N
NO
OTT attempt to disassemble the actuator due to spring under load danger.
SPRING UNDER LOAD
Do not attempt to cut open
kg
!
Do N
NO
OTT attempt to cut the actuator open due to spring under load danger.
WARNING
SPRING UNDER LOAD
DO NOT ATTEMPT TO CUT ACTUATOR OPEN
REFER TO SERVICE BULLETIN
!
If marked with a danger warning, do N
NO
OTT attempt to cut the actuator open, due to spring under load.
18
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