Tech Master manual changeover control panels are designed and manufactured to comply with the requirements of BCGA Codes of Practice CP4. The manual changeover control panels are manufactured to operate in conjunction with cylinders filled to 300 bar and are ideally suited to the requirements of industrial applications where cylinder gases are used. These control panels are designed to accommodate 2 equal sized banks of cylinders with sizes ranging from 2 x 1 to 2 x 6 with one bank set as operational and the other bank set as reserve.