Filter is the filter industry professional terms, in order to purify the original ecological resources and resources re-use, and the need for purification equipment, and now the filter is mainly used in oil filtration, air filtration, water filtration and other filtering industry. Remove the liquid or air in a small amount of solid particles, can protect the equipment's normal work or clean air, when the fluid enters the filter filter of a certain size after the impurities are blocked, and the flow through the filter clean out. A filter is a device indispensable transport media pipeline, usually installed in the valve, relief valve inlet pressure, water valves or other equipment end, used to remove impurities in the medium, to protect the normal use of valves and equipment. When the fluid enters the filter cartridge has a certain size, the impurities are blocked, and clean filtrate from the filter outlet, when cleaning, as long as the removable cartridge is removed, you can reload after treatment, therefore, maintenance is extremely easy to use.