Systems and methods for processing stored value card requests are disclosed herein. A system and method are provided for bypassing and invalidating cache memory when writing data to system memory particularly when the primary memory could include memory types where the write operation mixes non-data with data. The driving waveform generating unit generates plural driving waveforms on the basis of the plural digital signals. A tilt subassembly enables pivotal movement of the seal assembly using a ball and socket. A gas passage 13 includes a diameter direction gas hole 13a and an axial direction gas groove 13b, and the diameter direction gas hole 13a is made to communicate with the axial direction gas groove 13b when the diameter direction oil supply hole 11b is made to communicate with the axial direction oil supply groove 11c.