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 Taps, cocks, valves and similar appliances for pipes, boiler shells... 84 81 10 Pressure-reducing valves 84 81 10 00 Pressure-reducing valves Commodity Code Description 84 81 10 00 000 Pressure-reducing valves