AWS 930 Series User Manual

7 COMMISSIONING, DECOMISSIONING, MAINTENANCE
Revision status: 03/05/2022 17 Index number: D0-116
7.5 Correct malfunctions and defects
Malfunctions or defects may occur during operation. The following table shows possible
causes and the appropriate solution. If malfunctions/defects are not listed, please contact the
manufacturer.
Malfunction/Defect
Cause
Solution
High noise emission
Calming distance too low/not
respected
Install the valve at a suitable
position in order to be able to
maintain the calming distance
Flow rate too low
Select smaller nominal size
No flow present
Valve installed the wrong way
round
Align flow direction arrow with
flow direction
Flow rate too low
Increase pressure or flow rate
Washer jammed
Clean valve
Replace valve
Closing spring too strong, valve
cannot open
Use a weaker closing spring
Leakage rate too high
O-ring damaged
Replace O-ring
Disc deformed
Replace disc
Sealing surface damaged
Rework sealing surface,
replace affected component if
necessary
Sealing surface dirty
Clean the sealing surface
Wear
Replace affected components
Closing spring worn/defective
Replace closing spring
Flange leakage
Flanges not sufficiently braced
Check fasteners and
retighten if necessary
Sealing surface/seal damaged
Rework sealing surface,
replace body if necessary
Sealing surface/seal dirty
Clean sealing surface/seal

AWS 930 Series Specifications

General

Brand	AWS
Model	930 Series
Category	Control Unit
Language	English