| 摘要 |
The present system uses a large volume of low pressure air to propel a free (i.e., physically unattached to any other component of the invention) boiler tube brush through a boiler tube. The system tank receives relatively high pressure from a conventional source, e.g. "shop air" from a standard compressor and tank. A pneumatic or electric switch shuts off incoming air at a relatively low pressure, and simultaneously sends a signal to a trigger switch at the delivery hose output nozzle. Operating the trigger allows the signal to return to the large capacity output valve to which the delivery hose is attached, sending a large volume, low pressure air pulse through the hose and nozzle to pneumatically propel the tube cleaning brush through the boiler tube without hazard. The brush comprises a series of loosely matted fiber discs assembled on a core. Each disc may have a different abrasive quality.
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