Dust filter valves

A number of technologies to clean dust filters effectively and inexpensively are available. One of the most efficient is the air-blasting technique. The basic principle is straightforward. A short, intense pulse of air blasts into the soiled filter element. Dust and loose dirt from the filter fall to the ground and can be removed from there. Following the short cleaning cycle the filter is ready and the filter system can again operate at full capacity.

Filter valves for air-blasting have been developed to allow efficient and inexpensive cleaning. Top priorities in the developers’ requirements specification were to optimise the filter cleaning, reduce air consumption and prolong the valves' service life. To achieve optimum cleaning with the compressed air pulse, the pressure in the filter has to reach the set point very quickly. This means that the valves must open fully within a few milliseconds. Compared with the previous models, this filter valve series has extremely fast open- ing times, which are essential for effective, intensive cleaning. The closing mechanism is just as fast as the opening mechanism. This determines the economical operation of a valve. The air pulse must return to zero as quickly as possible, as any minor delay will only consume air and cost money.