When it is found that the steam trap cannot work and no reason is found, it is necessary to observe the discharge of the trap. If the trap is equipped with a test valve, the check is simple. Instead, the outlet connection line must be opened.
Steam trap common faults and treatment methods:
One, undrained
The trap cannot discharge condensate, the trap does not respond for a long time, and the surface temperature of the valve drops, which is why the trap cannot be opened. The reason for this failure:
1. The filter or piping is blocked by impurities and dirt. Condensate cannot flow into the steam trap. It is necessary to clean the filter, piping and dirt inside the valve.
2. If the amount of condensate drained by the trap is very small or the action interval is particularly long, then it should be replaced with a small-capacity trap.
3, non-condensing drain trap is hot, steam or steam produced by the second steam plugging phenomenon once the steam is condensed, the steam plug disappears. This is due to the unreasonable installation of steam traps. There should be no place where condensation water can be trapped in the middle of the inlet pipe.
4, water damage floats into the water can not float, should replace the new float.
5, excessive pressure. The pressure of the steam equipment exceeds the maximum operating pressure of the steam trap and the steam trap cannot be opened. Replace steam traps with higher working pressures or adjust the working pressure of the lowering steam equipment.
6. The vacuum of the water heater coil interferes with the discharge. Install a vacuum breaker between the heat exchanger and the water valve.
Second, the continuous discharge of steam traps does not close 1, the trap row of condensing water does not close, it is necessary to replace the drain valve with large discharge capacity.
2. The trap is continuous with water and steam in the same row. Foreign matter or the guide surface is interposed between the valve core and the valve seat. Impurities, disassembly, cleaning, and removal of foreign materials are required.
3, mechanical type (lever float ball, free float ball, inverted bucket type) trap installation error will also produce the phenomenon of not open the valve, must be installed according to the requirements of the installation diagram
4. If the film box is damaged or the bimetal is permanently deformed so that the trap does not close, it is necessary to replace the damaged film box or the failed bimetal.
5, Corrosion perforation near the shell outlet can be dismantled to repair welding or replace the bad shell.
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