• Determine the number of AIV’s required. See table below.
• On a free standing cone based silo determine where the base cone meets the side walls.
• Measure down 400mm towards the base of the silo.
• Position the AIV’s evenly around the cone of the silo.
• Avoid placing any AIV in the direct path of the grain being dropped into the silo from the top opening lid.
• Draw a 100mm circle on the cone where the AIV is to be inserted.
• Drill a pilot hole in the circle enabling a metal nibbler to be inserted and cut a 100mm circular hole.
• Remove mesh end cover and upper moulded flange from AIV and insert the AIV into the hole in the silo cone.
• Drill out bolt holes through silo cone where indicated on flange.
• Slide AIV out and place sealant on the underside of the outside flange and as AIV is repositioned put bolts in place.
• From inside the silo cone, replace upper flange to cylinder, place sealant on inside of flange and align with bolts. Tighten nuts & bolts causing both flanges to push together against silo cone. Once in position run a bead of sealant around the top edge of the flange to seal against cylinder.
• Run a bead of sealant around the mesh cover of the AIV and push the cover on the end of the AIV cylinder.

For straight side silos measure from silo base up 300mm and draw a 100mm circular template and repeat the above mentioned installation procedures.

The capacity of a silo determines the number of AIV’s required.

Silos up to 30 tonnes,                     1 x AIV.
31-70t silo.                                      2 x AIV.
71-200t silo.                                   3 x AIV.
201-500t silo.                                 4 x AIV.

In all procedure operations comply with your states OH & S regulations for working with steel, sealants and in confined spaces.