Section 16 MACHINERY AND MECHANICAL APPLIANCES; ELECTRICAL EQUIPMENT; PARTS THEREOF; SOUND RECORDERS AND REPRODUCERS, TELEVISION IMAGE AND SOUND RECORDERS AND REPRODUCERS AND PARTS AND ACCESSORIES OF SUCH ARTICLES 84 NUCLEAR REACTORS, BOILERS, MACHINERY AND MECHANICAL APPLIANCES; PARTS THEREOF 84 81 THERMOSTATICALLY CONTROLLED VALVES. 84 81 90 PARTS OF TAPS/COCKS/VALVES & SIM. APPLIANCES FOR PIPES, BOILER SHELLS,... Commodity Code Description 84 81 90 00 PARTS OF TAPS/COCKS/VALVES & SIM. APPLIANCES FOR PIPES, BOILER SHELLS,...