Steam Turbine Trip Valve Block from United States
Steam turbine trip valve blocks are manifold blocks housing emergency trip valves that rapidly cut steam supply for overspeed protection, mandatory safety components per ASME codes. These blocks are classified as 'other' parts under tariff item 8406.90.39, as they are not rotors, blades, or other specifically named turbine components.
Duty Rate — United States → Canada
0%
Import Tips
• Describe the trip valve block as an integral part of the steam turbine safety system on customs documentation
• If the block includes valves, verify whether the valves are classified separately under heading 84.81
• Provide ASME certification documents to support the safety function and classification