BLOW-OFF SYSTEMS

• Liquids Blow-Off Devices  
• Fast Air Cooling 
• Conveyor Belt Cleaning 
• Process Air Curtains 
• Conveyor Dryers 

• automotive parts production 
• beverage bottles conveyor drying 
• plastic industry  
• glass manufacturing blow off and cooling 
• pallets cleaning 
• industrial air-curtains for fume separation 

For special applications we offer air canons and air nozzles to achieve turbulent high velocity air flow.

    

As compared to curved sheet blades, aerofoils can apply greater force to the air, thereby increasing maximum pressure and can maintain better efficiency over a wider range of volumetric flow. Also by increasing the thickness & curvature of the inner sections, the blades can be made stiffer, this limits flutter and allows the impellers to be run at higher speeds.
In recent years, fan speed control using VFDs has become economical. In this application, a standard energy efficient motor is usually adequate down to 75% of normal motor speeds. For a fan speed down to 25%, a premium efficiency motor is required. Inverter duty motors are not usually necessary since at 25% of normal fan speed, air delivery is minimal. Variable Frequency Drives are also programmable. They are used to provide soft starts and to ramp motor speed up or down in response to signals from the control system. Finally, in a generally “clean” environment without a critical need to remove large quantities of contaminants, a simple solution to building pressurization is a Return Air Unit with the return air damper motor controlled by building a pressure sensor. When building pressure increases, more inside air is returned through the unit, relieving the pressure. When building pressure falls, more outside air is supplied to the building in order to “pump up the pressure”. Precise control of building pressure by a single piece of equipment can thus be achieved.
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