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Silo Ventilations:
Steel are Good Conductor of Heat. During summer outer layer of commodities became hot while inner layer stay cool. During winter outer layer of commodities became cool while inner layer stay warm. Grains are living organisms and release water vapor during respirations. Difference in temperature gradient results in condensation of moisture at top during winter and at bottom portion during summer. Moisture condensation can damages commodities, even germinations at top layers.

Silo Sealing:
Permanent Sealing – Silo Walls Joints, Roof top joints, sprout sealing.
Temporary Sealing – Vents, manhole, opening duct, aeration pipes. Inputs & discharge points.
Silo must be properly sealed from all sides for effective fumigation. This includes sealing all entry and exit points to prevent gas leakage, as well as testing the air quality inside the silo to ensure that it is safe for fumigation services. Once the silo is properly sealed, the fumigant gas is released into the silo using a equipment.
For effective fumigations Silos have to be air tight to prevent leakages of fumigants. Most of silo’s are water tight but air tightness are not done and checked properly. Leaked silos also lead to development of resistant species of insects. Risk of fire hazards is increase in leaked silos'.

Critical Success factors

• Proper sealing of silos structures and vents, input, discharge points etc.


• Clean grains, Too much dust prevent diffusion of fumigant preventing equal distributions across the silo.


• Moisture content of grains (not less than 9%) and space within silos ( not less than 50% RH).


• Temperature less than 11 degree Celsius results in improper diffusions.


• Fumigant concentrations of minimum 200 ppm for 7 days.


Sealing materials



Roof Vent sealing



Sealing of silo at top conical structure at Roof & wall Joints