The filter press has reached a high level of treatment of various water qualities. The equipment can easily treat various wastewater. Filter press feed pumps are unacceptable in the presence of various wastewaters. Whenever a certain amount of wastewater is pumped, pure water that accepts various impurities flowing from the filter cloth is accepted. In many cases, it is impossible to avoid water evaporation when the filter press encounters high temperatures during the filtration process. The evaporation of water will reduce the actual working efficiency of the equipment to a certain extent. After treatment, the liquid will slightly decrease with evaporation, but this is also a normal phenomenon. This is inevitable in actual production. If we can better understand the climate change when the filter press is working, it can extend the use of the equipment life. However, many times the filter press is always affected by various environments. Special attention is required in production. The filter press's hydraulic system is important to the entire system. Choosing a good hydraulic oil has a great impact on plate and frame filter presses. Hydraulic oil can provide powerful pressure to the filter press. And choose a neutral pressure oil that is resistant to wear and pressure.