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9. Cleaning Function

Rust, scale and other buildup on the valve seat may hinder the sealing ability of the steam trap
and cause steam leakage and resultant higher product temperature; or block the valve seat
opening - thereby preventing condensate discharge and resultant lowered product temperature.
The FX1 contains a built-in cleaning device that can be used without removing the trap from the
line. Follow the steps below to remove contaminant accumulation from around the valve opening.
CAUTION
Cleaning Function Instructions
1. First close the inlet isolation valve, followed by then closing the outlet isolation valve. Wait
until the pressure between the inlet isolation valve and the trap equals atmospheric pressure
(when the trap body temperature cools to room temperature). Do not remove the cap nut or
the cover unless the trap is isolated from and is not subjected to steam pressure.
2. Hold the cover with one wrench and use another wrench to slowly loosen and remove the
cap nut. Remove cap nut slowly to allow any residual pressurized steam to leak from the trap
interior through the threads of the adjustment screw and the cover. If steam leakage occurs
while loosening cap nut or locknut, disassemble the trap and replace both the
seal ring and the cover gasket (see chapter 10).
3. Hold the adjusting screw in place with a flat-head screwdriver and remove the locknut slowly
in case of any additional steam leakage.
4. Check the current set position of the adjusting screw. Check and record the number of turns
required to return to the standard factory setting (when points (A) and (B) are even with each
other as shown on page 10).
5. Use a flat-head screwdriver to slowly turn the adjusting screw clockwise (to tighten) until it
stops. (This causes the cleaning edge of the stem to reach the valve seat and loosen debris).
6. Slowly turn the adjusting screw counterclockwise (to loosen) until it stops. (This will allow
flushing once the steam is safely turned on using the instructions that follow).
7. Replace the cap nut and tighten it to the proper torque (see page 13).
8. First fully open the outlet isolation valve, and then slowly and carefully open the inlet isolation
valve – checking for any steam leaks. In the event steam leaks are detected, immediately
close the inlet isolation valve, then the outlet isolation valve, and repair the source of leakage.
9. Wait 10 seconds to allow any loose scale to be flushed internally. Be aware of any external
steam leak – including the outlet connection if opened to atmosphere. Be careful to not come
in contact with any steam that is discharging from an open outlet connection. If any steam
leaks are detected elsewhere on the trap or piping, immediately close the inlet isolation valve,
then the outlet isolation valve, and repair the source of leakage.
10. Next, prepare to set the trap temperature again by first isolating the trap and safely relieving
all steam pressure from the trap as follows.
11. First close the inlet isolation valve, followed by then closing the outlet isolation valve. Wait
until the inlet pressure equals atmospheric pressure. (When the trap body temperature cools
to room temperature)
12. Hold the cover with one wrench and use another wrench to slowly remove the cap nut as in
step 2 above.
13. Slowly turn the adjusting screw clockwise (to tighten) to return to the original position
checked in step 4 above.
14. Replace the locknut. Hold the adjusting screw in place with a flat-head screwdriver and
tighten the locknut securely.
15. Replace the cap nut and tighten it to the proper torque (see page 13).
16. First fully open the outlet isolation valve, followed by then slowly opening the inlet isolation
valve – carefully checking for any steam leaks. In the event steam leaks are detected,
immediately close the inlet isolation valve, then the outlet isolation valve, and repair the
source of leakage.
17. Check the temperature setting by observing an inline temperature sensor or by measuring the
temperature at the trap inlet wrench flat at least 30 minutes after supplying steam with the
new setting. The trap set temperature will be approximately 10 to 20 °C (20 to 40 °F) higher
than the temperature reading on the trap body surface. If the resultant temperature is not as
desired, use the above instructions for adjusting temperature settings (see page 9).
• To prevent possible injury, always relieve pressure from trap before
opening to clean the trap.
• Always wear heat-insulated gloves and eye protection when handling pro-
ducts exposed to high temperatures. Failure to do so may result in burns.
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