Air wipe for extruded shapes and hose

November 2005 Maintenance, Test & Measurement, Calibration

Exair Super Air Wipe provides a uniform 360° airstream that is suitable for blowoff, drying, cleaning and cooling of pipes, cable, extruded shapes, hose and more. The split design offers easy clamping around the surface of the material moving through it, eliminating the need for threading. All models have stainless steel screws and shims. Stainless steel wire braided hose is also included on sizes up to 102 mm for added corrosion and heat resistance. Aluminium models are rated for temperatures up to 204°C and stainless steel models for temperatures up to 427°C.

Prior to the introduction of this product, the only way to blowoff, dry, clean and cool these surfaces was to use a ring of air nozzles. The high air consumption and the noise levels of the nozzles along with inconsistent air velocity often delivered poor results. The Exair Super Air Wipe provides a high volume, high velocity airflow that is uniformly ejected from the 360° of its inner diameter. The velocity can be varied from a blast to a 'breeze'. Air consumption and noise are low.

The air wipe is easy to use and install. There is a ¼ NPT female inlet on each half of the device on sizes up to 178 mm. Larger sizes include two ¼ NPT female inlets on each half in order to maintain proper air volume and performance. Aluminium Super Air Wipe up to 102 mm include a brass tee that supplies one half directly and a stainless steel wire braided coupling hose rated at 204°C to supply the other half. Stainless steel Super Air Wipe up to 102 mm include a stainless steel wire braided coupling hose rated at 427°C. Larger sizes should be piped directly.

Tapped holes on the back are provided for permanent mounting if the air wipe is not held in place with rigid pipe. Coupling brackets that hold each half of the device together are provided which can be installed or removed quickly if required. How it works:

Compressed air flows through an inlet (1) of the Super Air Wipe into an annular chamber (2). It is then throttled through a small ring nozzle (3) at high velocity. This primary air stream adheres to the Coanda profile (4), which directs it down the angled surface of the Super Air Wipe. A low pressure area is created at the centre (5) inducing a high volume flow of surrounding air into the primary airstream. As the airflow leaves the Super Air Wipe, it creates a conical 360 deg ring of air that attaches itself to the surface of the material running through it (6), uniformly wiping the entire surface with high velocity airflow.

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