Rotary Switch

Switch for diverting or converging granular and powder materials

The Dynamic Air Rotary Switch automatically diverts dry, bulk materials in a pneumatic conveying system to 2 or 3 destinations. Or, it can converge materials to a single destination. The Rotary Switch features a smooth indexing swing tube that aids material flow and minimizes material buildup at corners and seams. Welds are smooth so there are no dead spots for material to collect, making the Rotary Switch ideal for applications where cross contamination is a major concern.

Inflatable air seals eliminate dust problems

The heart of the Rotary Switch is its inflatable seal at both ends of the swing tube, which is suitable for conveying pressures up to 100 PSIG. These seals are located at the upper pivot point and at each of the outlet port connections. When the swing tube indexes to the desired port, both the top and bottom seals inflate, squeezing the spout from both directions to form a dust-tight pressure seal. The blind or unused ports are similarly sealed when the swing tube is not moving so hoppers and bins are not exposed to the atmosphere.

To index the swing tube to a new position, the seals are deflated, giving the swing tube clearance to rotate freely around the center support shaft with minimal friction and effort. The swing tube is moved by a rotary actuator for positive positioning.