A method and computer program product for identifying one or more malfunctions in a locomotive air compressing system is provided. The preform is processed under the flame-controlled conditions. The plurality of first electrodes is coupled together. The proximal portion of the valve housing may then be rotated in an opposite direction to release the seal and return the tubular seal element to a relaxed lumen open position. The interpoles are disposed in the housing. The insertion opening forms a vertical guiding passage having a rectangular cross-section delimited by two large parallel surfaces and two side surfaces, the opening including a hatch actuated by a motor, wherein the hatch can assume a position for blocking the opening or a released position.