Alfa Laval SRC PN10 User Manual

4Operation
Pay attention to possible faults.
Study the instructions carefully.
The items refer to the parts list and service kits section
4.2 Fault finding
Problem Cause/result
Repair
The valve plug jerks The lealings seize Lubricate:
-O-rings(2)
- O-ring (5) and the inside of cylinder (3)
- Lip seal (14)
Product leakage
at stem and/or clamp
- Worn/product affected lip seal (14) and/or
seal ring (17)
- Replace the seal
- Replace with a seal of a
different rubber grade
Product leakage
(closed valve)
- Worn/product affected
- Loose plug parts (vibrations)
- Product deposits on the seat and/or plug
- Replace the seal ring
- Replace with a seal of a different rubber
grade
-Tightenthelooseparts
- Frequent cleaning
Product leakage
(too high pressure or too
small actuator)
- Worn actuator O-rings
- Too small actuator or actuator spring
- Replace the O-rings
- Replace with a larger actuator
(for valve sizes DN/OD38-63.5 mm/
DN40-65)
- Fit a stronger spring (for valve sizes
DN/OD38-63.5 mm/DN40-65)
- Use auxiliary air on the spring
side (NOT-element)
Water hammer The flow direction is the same as the closing
direction
- The flow direction should be against the
closing direction
- Fit a damper on the valve (optional extra)
- Use auxiliary air on the spring side
(NOT-element)
The valve does not open/close - Faulty clip assembly (11)
- The pressure on the plug plug is too high
- Replace the clip assembly
- Reduce the pressure plug is too high
- Fit stronger spring/larger actuator (for
valve sizes DN/OD38-63.5 mm/ DN40-65)
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Alfa Laval SRC PN10 Specifications

General

Brand	Alfa Laval
Model	SRC PN10
Category	Control Unit
Language	English