The specification of components for pneumatic conveying systems do not end with the pipeline, feeder, air mover and filtration system. There are likely to be many bends and diverter valves on the plant and their importance is significantly magnified if the material to be conveyed, such as cement, is very abrasive.
Both bends and diverter valves represent major problems in pneumatic conveying and are responsible for the majority of operating problems.
INGESOA®Spherical Bends and Two-Way Diverter Valves have been specifically developed to minimize operating problems in pneumatic conveying systems.
Two-Way Diverter Valve
Our two-Way Diverter Valves have been specifically designed to divert powder and ground materials in positive pressure conveying systems.
The internal mechanism works on the principle of a sliding disc that provides a seal against the inlet to either pipe.
The valve body is constructed in cast iron. Ni-Hard disc and hardened and tempered seats, resist abrasion and are lapped to maintain a positive seal at the closed port.
Actuators available: pneumatic and motorized.
Ordinary bends provide a pneumatic conveying pipeline with considerable flexibility but are the cause of two main problems: erosive wear and material degradation. If the conveyed material, such as cement, is abrasive, an ordinary bend could fail within hours.
INGESOA® spherical bends help to reduce erosive wear and particle degradation with the expansion of the air to a larger section. This expansion reduces the air velocity and consequently the impact velocity against the bend wall. The turbulence in spherical bends is so great that even if the velocity falls bellow the minimum value for the material, the pipeline is unlikely to block.
Due to the impact of particles against bend walls and general turbulence, there is a pressure drop across every bend in a pipeline. The particles leaving the bend are at a lower velocity than that at entry and so they have to be reaccelerated. The major element of this pressure drop is that due to this reacceleration of the particles back to their terminal velocity, which is recorded across the straight length of pipeline following the bend. For this reason INGESOA®spherical bends are provided with a concrete reinforced outlet pipe to avoid excessive wear.