How to judge the steam trap by listening to the sound

Judging whether the steam trap is good or bad by listening to the sound

Whether steam traps work properly or not, generally non-professionals can judge by some simple means. Temperature detection is a convenient and simple method. The extension method of the temperature inspection method is an infrared imaging inspection method.

Experienced engineers often use saliva or water vapor to rate the trap to determine if the trap is leaking, but this method is more used to detect stagnant water than leaks. It is often a practical method to use an infrared thermometer to measure temperature at the trap discharge.

Due to the throttling of the trap nozzle, the pressure at the discharge port is lower than the temperature of the chamber, which makes it easy to judge whether the trap has leaked.

Multiple tools can be used to detect traps, some use temperature, some use sound, and some use both. Testing the trap with temperature only requires testing the temperature probe at the inlet end of the trap, not the outlet end.

If the temperature indicates that the surface temperature of the trap is significantly too low, it means that the trap is blocked or the displacement is insufficient. These problems can cause condensate to accumulate, which reduces the temperature of the trap. If the temperature is very low and the application is still "working", it means that the size of the trap may be too small, the valve tip is wrong, the trap/filter is clogged, or there is a regulating valve in front of the device, so that the pressure difference is not enough. Drain the condensate ("stagnation"). In the event of a stagnation, the trap may be good by itself, but a different type of drain is required. Replacing the trap does not improve the drainage capacity

Hangzhou Watt energy-saving experience shows that if the surface temperature of the trap is very close to the steam temperature (within 5 °C), and the saturation temperature of the trap rear nozzle and the back pressure of the condensate system is too high (within 5 °C), then The trap may leak.

Sometimes even if the inlet steam temperature is within 250 ° C, if the condensate is directly discharged to the atmosphere, the temperature at the outlet end of the trap may not reach 100 ° C. Even if the steam leaks, the temperature indicates normal.

For closed condensate systems, if the temperature behind the trap is very close to the pre-valve temperature, the trap may leak.

For the partial leakage of the trap, it is difficult to judge the trap leakage completely by the temperature, and it must be combined with other methods to make a comprehensive judgment.

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