6
Common metals and their alloys; pressure vessels (of metal) for industrial purposes; feed water tanks (of metal) for industrial purposes; pressurized vessels and high-pressure and process piping systems of metal; tubes (of metal); tube parts (of metal); valves (of metal); valves (of metal) for the process industry (not parts of machines); Flap valves of metal; water pipe valves [metal]; manually operated metal valves; clack valves of metal [other than parts of machines]; regulating valves of metal [other than parts of machines]; metal valves for controlling the flow of fluids in pipelines; pipes, tubes and hoses, and fittings therefor, including valves and strainers, of metal
7
Heat exchangers (parts of machines); debarking and drying drums (parts of machines); steam condensers (parts of machines) for industrial purposes; valves (parts of machines), valves for the process industry (parts of machines); ball valves; butterfly valves; servo-valves; hydraulic valves; shutter valves; motorised valves; power operated valves; actuators for valves; pneumatically operable valves; hydraulically operated ball valves and butterfly valves; thermostatic control valves for machines; valves [mechanical] for regulating fluid flow; Level regulating valves [parts of machines]; ball valves and butterfly valves being parts of machines
11
Heating apparatus, steam generating installations, cooling equipment, desiccating apparatus, air-conditioning apparatus, water supply equipment and sanitary apparatus, especially heat pump unit, exhaust air and heat recovery apparatus; heat exchangers (not being parts of machines); debarking and drying drums (not being parts of machines); steam accumulators; steam condensers (not being parts of machines); evaporators; feed water tanks; pressure water tanks; boilers; water coolers; heating systems; electric control apparatus for use in conserving energy in heating systems; ball valves; butterfly valves; level control valves; strainers being parts of water supply equipment; steam valves; radiator valves; thermostatic valves; water control valves; float valves [ball cocks]; safety valves for water and gas pipes; stop valves for regulating water; valves (Thermostatic -) [parts of heating installations]
37
Repair, maintenance and installation services relating to valves, filters and control devices as well as other flow technical apparatus and equipment