Vortex Damper Construction
Vortex dampers are used at the fan inlet to spin the entering air or gas in the direction of fan wheel rotation. Depending on damper size and operating conditions, ProcessBarron offers cantilevered blade and center hub support blade designs. Vortex dampers, also known as variable inlet vane dampers (VIV), are most commonly associated with fan inlets handling flue gases less than 500°F.
Cantilevered blades are typically used for fans where corrosive gases, abrasion, and high temperatures are present in the flue gas. Vortex dampers eliminate the center bearing hub to minimize gas flow resistance and increase the life of the blades. Vortex damper blades are aerodynamically shaped to minimize air flow resistance at all blade positions.
Additionally, the blade shaft bearing and operating linkages can be serviced without removing the damper from the fan or connected duct system.
- Cantilevered blades with integral inlet cones are used for corrosive applications where a more precise pre-spinning of air is required. Vortex damper air spins directly into the eye for accurate air control. Dampers of this design can be used with single and double inlet fans. The housing can be provided with two bolted splits 180˚ apart to allow for installation on existing fans without removing the fan rotor assembly.
- Center hub vortex dampers are designed for clean air fans operating at high static and velocity pressures. The center blade hub incorporates spherical sleeve bearings, which are high-strength, self-lubricating, and self-aligning for easy maintenance. The damper housing can be provided with two bolted splits 180˚ apart to allow for convenient installation on existing fans without removing the fan rotor assembly.
ProcessBarron’s skilled team of craftsmen manufacture and assemble specialty dampers in-house at our Alabama facilities. Our field service department specializes in turn-key installation of new dampers and the inspection, maintenance, and thorough analysis of problems with existing equipment. All custom vortex dampers are designed, manufactured, shop assembled, and tested in-house.