Low energy and non-heat transferring crust breaking system

摘要

A pneumatic control system is provided for selectively controlling movement of a pneumatically-operated device between first and second working positions. The pneumatically-operated device includes a working portion and a pneumatic-control portion. The pneumatic-control portion is in fluid communication with a pressurized fluid source and includes a series of valves for selectively manipulating the working portion between the first and second working positions. The pneumatic-control portion further includes a sensing system for holding the working portion in a static mode by selectively applying system pressure to the working portion. In this manner, a more energy efficient system is provided by eliminating the need for continuous application of full line pressure.