IOM - BALL CHECK VALVES, UNIWAT® 3240/3141
©COMEV
AL
V
A
L
VE SYSTEMS
T
e
chnical Dept. Ref. IOM-BALL
CHECK V
A
L
VES, UNIW
A
T® 3240/3141 - Ed.16/07
Comeval V
alve Systems reserves the right to alter any technical data contained in this Manual without prior notice. Regularly u
pdated data on www
.comeval.es
7. CARE AND MAINTENANCE
The operator must de
¿
ne maintenance and maintenance-intervals to meet requirements.
- Check for body, seat area and connections tightness, and valve smooth operation without additional tools.
- When reassembling the cover, clean gasket seat surface and use a new gasket if necessary. Then tighten the cover
bolts evenly crosswise with moderate and uniform torque. Retighten bolts crosswise if any leakage is detected under
pressure.
After any maintenance work please refer to chapters 5 and 6 for installation / commissioning.
Recommended Spare parts:
Use only original spare parts.
It is advisable to keep body/cover gaskets and balls as spare parts. Type and number of each spare part to be stored
according to many factors: service level, valves quantity, etc. In many cases a good choice is to keep complete valves
as spare part.
8. TROUBLESHOOTING
In the event of malfunction or faulty operating performance, check that the installation and adjustment work has been
carried out and completed in accordance with this Manual.
9. TROUBLESHOOTING TABLE
Technical support always available through our website www.comeval.es or your local distributor.
ATTENTION!
- It is essential that the safety regulations are observed when identifying faults.
Page 5
ATTENTION!
- Before disassembling the valve, note chapters 3, 10 & 12.
- There is a crushing hazard between the ball and the body seat area. Ensure the ball is in rest position in
case a hand is introduced inside the valve.
- Only carry out maintenance work in the pipework when the valve has been secured from operation.
- Check the valve surface inside and outside and retouch coating protection when needed. If advanced
corrosion or erosion is observed, double check service and valve features and replace the valve properly.
ATTENTION!
- Read the complete Manual before carrying out installation and repair work.
- Read chapter 6 before recommissioning.
FAULT
POSSIBLE CAUSE
CORRECTING MEASURES
No
À
ow
Not enough
À
ow
Flange covers or protection not removed
Clear valve entrances
Improper installation position
Check installation position
Piping clogged
Check piping system
Not enough pressure or
À
ow
Check working parameters
Ball blocked
Check and try to unblock
Broken
À
ange
Bolts not properly tightened
Mating
À
anges not properly aligned
Re-align piping and
¿
t new valve
Valve not closing with
reverse
À
ow
Ball surface or seat area damaged Check valve components
Very low reverse pressure
Check the system
Improper installation position
Check installation position
Ball blocked
Check and try to unblock
Ball stick
Fine vacuum service
Use a degassing connection
Leakage between body
and cover
Cover bolts loose or gasket damaged
Retighten cover bolts or change gasket
