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9.
REASONS OF OPERATING DISTURBANCES AND REMEDY
-
When seeking of valve malfunction reasons safety rules should be strictly obeyed
Fault
Possible reason
Remedy
No flow
Valve closed
Open the valve
Flange dust caps were not removed
Remove dust caps on the flanges
Poor flow
Valve is not open enough
Open the valve
Dirty filter
Clean or replace the screen
Clogged pipeline
Check the pipeline
Control difficulties
Dry stem
Grease the stem
Gland packing tighten too much
Slightly slacken gland nuts. Put attention to
keep stuffing box tightness
Stem leakage
Too much loose on the gland
Tighten the gland until tightness will
be reached
If necessary add packing rings in
stuffing box. Keep special caution.
Seat leakage
Shut off not correct
Tighten the handwheel without any
auxiliary tools
Seat or disc damage
Replace the valve and contact supplier
or manufacturer
Apply the valve with balancing disc.
Check if the valve was assembled
according to arrow direction marked
on the valve
.
Pressure difference too much
Clean the valve. Fit strainer before the
valve.
Medium polluted with solid particles
Broken connecting flange
Bolts tighten unevenly
Replace the valve with new one
10.
VALVE SERVICE DISCOUNTINUITY
All obsolete and dismantled valves must not be disposed with household waste. ZETKAMA valves are made of materials which can
be re-used and should be delivered to designated recycling centers
.
11.
WARRANTY TERMS
- ZETKAMA grants quality warranty with assurance for proper operation of its products, providing that assembly of them is done
