Filter is a common purification equipment in industrial fluid treatment, mainly used to remove solid particles, impurities and suspended solids from liquid or gas, ensuring the normal operation of subsequent equipment and product purity. Widely used in food, pharmaceutical, chemical, water treatment and other industries, it features simple structure and stable filtering effect. Different precision and materials can be selected according to working conditions to achieve efficient impurity removal, making it a basic equipment to ensure quality and safety in production lines.