Developments in Blow-Off Drying Programs & Air Knives

One of many highest-cost parts for today's contemporary coating lines continues to be the drying of parts after the pretreatment, post-wash and prepaint cycles. One method to lower drying costs is by implementing effective blow-off drying. While this technology isn't new, advances in system design are making manual drying more effective, stationary drying less energy-intensive, and are increasing the coverage section of low-pressure multi-nozzle systems with repeatable results.

Using blower-driven high-velocity air knives or nozzles alone on simple part geometries can lower total drying energy by 75% or more in comparison to using heater tunnels or compressed air.

One of the highest-cost areas for today's modern coating lines continues to be the drying of parts following the pretreatment, post-wash and prepaint cycles. One way to minimize drying fees is by implementing effective blow-off drying. While this technology isn't new, advances in system design are making manual drying more effective, stationary drying less energy-intensive, and are increasing the coverage area of low-pressure multi-nozzle systems with repeatable results.

The standard method of using heater tunnels alone requires tremendous levels of energy to boil off "puddles" of water before complete parts drying can be achieved. The major consequences of continuing to make use of this single drying method are that the final rinse water quality should be very high to prevent surface spotting, the parts in many cases are heated to higher temperatures than necessary for coating application, the heater tunnels are very long, and the full total energy costs are extremely high.

Some companies have considered air knife or air nozzle drying, but this technique also presents challenges. The main element to the effective air knife and air nozzle drying of parts is really a correct balance of the "2Vs" – velocity and volume. While compressed air provides ample velocity (pressure), the total amount of horsepower necessary to generate enough volume (in cubic feet each and every minute, or cfm) to project the air to the top of the parts is considerable. Actually, the compressor is wasteful of all blow-off applications, because the air nozzle or air knife pressures are in 50% or less of the 100+ psi that a compressor produces If you have any questions regarding where and just how to make use of https://stream-tek.com/air-knife, you could contact us at our web-site. .