Dual-DryŽ Air Bar Technology

Dual-Dry® Patented Design

The Dual-Dry system combines the best attributes of two different air bar types. Primary thermal transfer is furnished by conventional hole bars. Alternately placed Hi-Float® and Coanda-type air bars provide stable web flotation and additional heat transfer. When combined, the Dual-Dry system provides exceptional overall performance.

Rapid Heat-Up and Drying

The thermal transfer characteristics of the Dual-Dry system provide exceptionally fast heat-up to initiate and maintain drying. The system is ideal for applications that require high heat transfer and rapid water removal. In many instances, the Dual-Dry system can eliminate the need for temperamental gas infrared-assisted heating.

Hi-Float® Air Bars Provide Exceptional Web Stability

Hi-Float air bars are proven to provide superior web handling and transport. The thermal transfer effectiveness of the Dual-Dry hole bars permits the system to operate at much lower nozzle velocities, thereby enhancing the flotation stability of the Hi-Float air bars. Plus, the Dual-Dry system operates within a broad flotation operating envelope, allowing a wide range of stock weights, water coverages and web tensions.

Superior Web Transport

Dual-Dry has been optimized to give improved flotation clearance and the correct sine wave profiling to resist fluting and edge flutter. Dual-Dry effectively balances the need for cross-machine web stiffness and clearance with the need to provide good lateral stability.

Drying Technology Provides Operating Cost Savings

Dual-Dry offers significant operating cost savings. In a dryer test with conventional pressure pad air bars, adequate drying and stability were achieved at nozzle velocities of 14,000 feet per minute. With the Dual-Dry system, equivalent heat transfer was achieved at 10,000 feet per minute. That's a 28% decrease in velocity with equivalent reduction in required fan horsepower. That means lower electrical costs, lower heat requirements and longer equipment life.