^(?P<unit_type>SF)(?P<unit_size>500|400|350|300|250|200|150|125)(?P<mounting_type>A|B|K)(?P<decompression_feature>0|1)(?P<sep_1>-)(?P<cracking_pressure>1)(?P<sep_2>-)(?P<unit_series>4X)(?P<sep_3>/)(?P<type_of_limit_switch>Q2|)(?P<power_supply_of_limit_switch>G24Z|)(?P<seal_material>|)(?P<pipe_port>|)(?P<special_version>SO102|SO104|)(?P<additional_details>(.|[0-9])*)$