The filter is designed for the extraction of dust created during the bulk unloading of grain and livestock products from trucks into the receiving hoppers of feed mills and storage plants. The filter consists of several units, depending on the length of the hopper, and is activated when the trucks are unloaded. Filter bag cleaning is done automatically, controlled by a timer. The suction hood is made of press-formed and bolted galvanized sheet metal, which serves two purposes: it functions as a support base for the filter, and conveys dust to the filter bags. The filter body is also made of press-formed galvanized sheet metal and serves to hold the filter bags. A hatch provides easy access for installation, removal and maintenance of the bags. The filter head, made of galvanized sheet metal panels, mechanically supports the baskets and bags. There is a fitting for connection to a suction device or intake pipe. The suction generates air flow through the filter bags, retaining the dust and allowing the emission of purified air into the atmosphere, in compliance with current regulations. A major brand fan equipped with an electric motor is used for this purpose. A frame made from metal profiles is installed on top of the filter, which houses the electric vibrator motor and holds the bags by means of special supports. The vibrator action allows the bags to be cleaned by shaking them to facilitate the detachment of residual dust. The frame is suspended on springs that ensure adequate operational flexibility.

The filter is designed for the extraction of dust created during the bulk unloading of grain and livestock products from trucks into the receiving hoppers of feed mills and storage plants. The filter consists of several units, depending on the length of the hopper, and is activated when the trucks are unloaded. Filter bag cleaning is done automatically, controlled by a timer. The pneumatic filter for the receiving hopper consists of a base made of press-formed galvanized sheet metal bolted in such a way as to form the base of the filter support and at the same time convey dust toward the filter bags. The filter body is also made of press-formed galvanized sheets and is used to hold the bags. A hatch allows for the installation, removal and inspection of the bags. The filter head is made of galvanized sheet metal panels and functionally supports the baskets and bags. There is a fitting for the application of a suction device or intake pipe. Suction creates an air flow for the extraction of dust, which, as it passes through the bags, will enable the recovery of dust to emit clean air into the atmosphere in compliance with current regulations. The filter bags are cleaned by introducing a countercurrent air flow so that the accumulated dust falls outside the bags. The tank is used to accumulate the air, which is sprayed by means of solenoid valves in large quantities for a very short time. Near the bags there are pipes with holes arranged in the center of each bag that shake the bags. The metal wire baskets support the bags so that they remain taut even when pressurized air is passing through them. The bags are cylindrical in shape, 120×2500 mm, made from needlepunch polyester fabric of the right weight to allow proper filtering. The filter is equipped with an electrical panel with a programmable electronic timer to control the solenoid valves, which sequentially adjusts the pause and work times provide for the blowing of air inside the bags and thus cleaning them. The panel has a pressure switch to monitor the working pressure in order to give alarms for any clogging or breakage of the bags.