... unloaded by forklift and withstand accidental drops and heavy container stacks.3.IBC is equipped with valves resistant to acid,alkali,corrosion ... 50mm,80mm.As the material of valve is same with container,the compatibility is good.Besides, it is convenient ,reliable and ... discharge and clean it.4.To ensure the safety,the container lid is equipped with air vent to avoid overpressure caused ...