The 20L semi-automatic filling machine is one of the most common production equipment in chemical plants. It is a machine specially designed to fill 20-litre containers, covering a range of 5-60 liters. It adopts the technology of liquid flow measurement and control, which integrates machine, electricity, gas, liquid flow measurement technology, calculation and communication control technology. The 20-litre semi-automatic filling machine has the advantages of simple structure, stable performance, simple operation, high measurement accuracy and strong anti-interference ability.