Answer: The automatic drainer can be said to be the most prone to failure in the cold dryer. The reason is that the condensed water discharged by the cold dryer is not clean water, but a thick liquid mixed with solid impurities (dust, rust mud, etc.) and oil, which is very easy to clog the drainage holes. For this reason, a filter is installed at the inlet of the automatic drainer. However, after a long time of use, the filter will also be clogged by oil impurities. If it is not cleaned in time, the automatic drainer will lose its function. Therefore, it is very important to clean the filter in the drainer at regular intervals.
If there is rust residue in the automatic drainer, it means that there are carbon steel pipes or components, generally the following components: air compressor cooler shell, air compressor outlet valve or check valve, air-water separator shell, cold dryer evaporator shell, gas storage tank, etc.
In addition, the automatic drainer needs a certain pressure to work. For example, the commonly used AD-402 automatic drainer has a minimum working pressure of 0.15MPa. If the pressure is too low, leakage will occur. However, the pressure cannot exceed the rated value to prevent the water storage cup from bursting. When the ambient temperature is lower than the condensed water in the water storage cup must be drained to prevent ice and cracking.
