Dense Phase Conventional Concept^™

Dynamic Air's Conventional Concept system is generally suitable for longer conveying line distances and fine, granular, abrasive, non-abrasive and difficult-to-handle materials, such as silica sand, refractory batch, soda ash or fly ash. The Conventional Concept system is a batch type conveying system that consists of a transporter, conveying line and Dyna-Chek 4 booster fittings.

During the filling cycle, material gravity feeds into the transporter through an inflatable seated butterfly valve. Displaced air is vented up through a vent valve to allow easier filling. Once the transporter is filled, as signaled by a level control or weighing device, the inlet valve and vent valve close and seal. The only compressed air that enters the transport vessel is the air that is used for material displacement. All other air required for conveying is added through the Dyna-Chek 4 booster fittings.

A cross-section of the Dyna-Chek 4 booster fitting shows how the diaphragm modulates to add air to the conveying line as it is required. The diaphragm, which acts as a check valve, allows the compressed air to enter into the conveying line while preventing material from back-feeding into the air supply lines. This is crucial to the reliability of the booster fitting and to overall system performance.

The spacing of the Dyna-Chek 4 booster fittings is completely dependent on the complexity of the material being conveyed. A very difficult material may have booster fittings very close together, whereas a very easy-to-handle material may have them spaced much further apart.

By spacing the booster fittings along the conveying line, the length of the conveying line, in effect, is reduced to the distance between the booster fittings, adding to system reliability and performance.

When the conveying line becomes nearly empty, the pressure in the transporter falls to zero and the air supply turns off, allowing the residual air volume to purge the transporter and conveying line.

Characteristics of this system are high air flow at the beginning and end of the transport cycle and a low air flow in between, with lower conveying line pressures.