^(?P<unit_type>SL|SV)(?P<unit_size>10|15|20|25|30)(?P<mounting_type>P|G)(?P<decompression_feature>A|B)(?P<cracking_pressure>1|2|3|4)(?P<sep_1>-)(?P<unit_series>4X)(?P<sep_2>/|=)(?P<pilot_valve>6U|)(?P<type_of_limit_switch>QM|)(?P<power_supply_of_limit_switch>G24|)(?P<sep_3>/|)(?P<seal_material>M|V|)(?P<sep_4>/|)(?P<surface_coating>J3|)(?P<pipe_port>/12|)(?P<additional_details>(.|[0-9])*)$