A pressure cabinet is much faster and more forceful that a syphon cabinet. A pressure pot holds the abrasive material and when a foot-peddle is depressed, air pressure pressurizes the pot forcing the abrasive through the hose to the gun nozzle.
Direct Pressure Cleaning
A direct blast cabinet uses relatively low pressure in most applications. The pressure is in the range of 40 to 60 PSI. Because of the low pressure, abrasive material breakdown is reduced even when high volumes are directed at the item being cleaned. Also, most of the abrasive is recovered and recycled in a direct pressure system.
Direct Pressure and Tough Work
A direct blast cabinet is best used for the tough stuff – where large areas are to be quickly cleaned. The direct pressure method is also best for jobs where heavy media or large size mesh is required. Media used in direct pressure blasting include aluminum oxides, plastic, urea, corn cob or walnut shell grit, glass, pumice, or steel shot. The tough work may include robotic operation according to businesswire.com.
Direct Pressure and Speed
Direct pressure systems are designed for speed. Production can be two or three times as fast as a suction system. The air is used more efficiently and there is greater media control. Systems with the ability to adjust pressure and media can handle delicate parts and also handle the most demanding cleaning operations.
So Which Is Better, Suction or Pressure?
The answer depends on your needs. While pressure systems have advantages in some areas, suction systems offer other advantages such as operating with less friction and therefore less heat. Syphon systems can provide wider patterns and deliver a more uniform cleaning pattern. Likewise, syphon systems can be easier to operate and maintain.
The direct pressure system is the tough guy on the block while operating at low pressure. Direct pressure can speed up production when heavy abrasive media is required. Consider your requirements and if the tough guy will meet your needs.