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, tanks, vats or the like, including pressure-reducing valves and thermostatically controlled valves Commodity Code Description 84 81 10 - Pressure-reducing valves 84 81 20 - Valves for oleohydraulic or pneumatic transmissions 84 81 30 - Check (nonreturn) valves 84 81 40 - Safety or relief valves 84 81 80 - Other appliances 84 81 90 - Parts