8. 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 appropriate corrective measures.
Problem
Cause
Remedy
Float is damaged or filled with condensate
Orifice, screen or piping is clogged with
rust or scale
X-element* or air vent strip** is damaged
The trap operating pressure exceeds the
maximum specified pressure, or there is
insufficient pressure differential between
the trap inlet and outlet
Steam-locking has occurred
Orifice is clogged, or rust and scale have
accumulated under the float
Orifice is damaged
Float is deformed or coated with scale
Trap is installed above the maximum
allowable inclination angle
Vibration of trap occurs
The X-element or air vent valve seat is
damaged, or clogged with rust or scale*
Air vent strip does not return to its proper
shape or is damaged**
Deterioration of or damage to gaskets
Improper tightening torque for cover was
used
Water hammer occurs
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 frequently
damaged
Replace the float
Clean
Replace the X-element or air
vent strip
Compare specifications and
actual operating conditions
Blow down through the bypass
or close the trap inlet valve
and allow the trap to cool
Clean
Replace the orifice
Clean or replace the float
Correct the installation
Lengthen inlet piping, then
fasten it securely
Clean or replace the X-element
or air vent valve seat
Replace with new air vent strip
Replace the gaskets
Tighten to the proper torque
Examine the piping for
problems that can cause water
hammer
* SJHX only ** SJH only
̶ 13 ̶
English
