The FVI range is compatible with pneumatic vacuum generators (venturi) or electric vacuum pumps (the FVI 2 model is suitable for a suction turbine). Each filter is fitted with an interchangeable cartridge treated to guarantee long life expectancy for the whole unit. The filtering element consists of a 5 micron filter (made of paper for version C), which is sufficient to protect pumps and venturi under normal operating conditions.Note: For filtration leaving large deposits (powder), mount the filter horizontally or upside down.Important : These filters are designed for vacuum. They cannot withstand pressure greater than atmospheric pressure.Filter cartridge available in 3 versions: paper, polyester and stainless steel.