The temperature of the oil and water contained in the compressed air affects the efficiency of the high efficiency air filter. Such as: when the temperature is 30 ℃, the oil flow through the filter when the 20 ℃ 5 times; when the temperature rises to 40 ℃, the oil flow through the filter is 20 ℃ when the 10 times. So the filter is generally installed in the compressed air system, the lowest temperature point.