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9. Troubleshooting
If the expected performance is unachievable after installation of the steam trap, read chapters 4
and 5 again, and check the following points for the appropriate corrective measures.
Problem
No condensate
is discharged
(blocked) or
discharge is
poor
Steam is
discharged
or leaks from
the trap outlet
(blowing)
(Steam leakage)
Steam leaks from
a place other
than the trap
outlet
Float is damaged or filled with
condensate
The trap operating pressure exceeds
the maximum specified pressure, or
there is insufficient differential pressure
between the trap inlet and outlet
Compare specifications and actual
operating conditions
Steam locking has occurred
Flow exceeds trap’s rated capacity
Blowdown through the bypass or
close the trap inlet valve and allow
the trap to cool
Check specifications and reselect
trap suitable for actual flow
Clean
Deterioration of or damage to gaskets
Replace with new gaskets
Float is
frequently
damaged
Water hammer occurs
Examine the piping for problems that
can cause water hammer
Scratches on the orifice
Replace with a new orifice
Float is deformed or coated with scale
Clean or replace the float
Trap is installed above the maximum
allowable inclination angle
Correct the installation
Vibration of trap occurs
Lengthen inlet piping, then fasten it
securely
The air vent strip is damaged
Replace with a new air vent strip
Replace with new float
Cause
Remedy
The float is sticking to the orifice
Tighten to the proper torque
Orifice, screen or piping is clogged
with rust or scale
Rust and scale have accumulated
around the orifice or under the float
Clean
Clean
NOTE:
when replacing parts with new, use the parts list for reference, and replace with parts
from the Maintenance Kit, Repair Kit, etc. Please note that replacement parts are only available as
part of a replacement parts kit.
Improper tightening torque on cover
nuts was used
English
