1.The Working Principle: Double bag filter is a kind of pressure filter equipment.The liquid by the inlet pipe through pump into the filter bag. The filter bag equipped with the strengthened net. The liquid go through the filter bag of standard fineness grade and then can obtain the qualified filtrate. The Impurity particles captured by filter bag.It is easy to change the filter bag according to the required grain finess. 2.The Performance Feature: (1)The quick pressure filter with novel structure and the small volume. (2) The operation method is easy and flexible. (3)It is a kind of high efficient and airtight equipment. 3.The Application: This kind of bag filter is widely used in many field. Paint, beer, vegetable oil, pharmaceuticals, chemical medicine, petroleum product, textile chemicals, photographic chemicals, electroplate liquid, milk, mineral water, Latex, industrial water, sugar water, resin, printing ink, industrial waste water, fruit juice, and the cooking oil, etc.