A method for processing a textile sheet material includes sealing a sheet material in a sealing region. The system comprises an event capture device that records both audio and video of an event. In addition, the term analyzer maintains frequency information representing the occurrences of the different combinations of text-based terms in the collection. The piston valve is driven by a pressure difference between the medium pressure chamber and the low pressure chamber, and by the spring. Hydraulic cylinders used to drive working pistons within the system can be selectively actuated to achieve varying force outputs to incrementally increase the gas pressure within the system for a given cycle.