1.1 Ultra-supercritical thermal power

Valve requirements: high-temperature and high-pressure valves (globe valves, gate valves, regulating valves, safety valves) on the main steam and reheat steam pipelines.

Technical challenges: Withstand high temperatures ranging from 620 to 650℃ and pressures exceeding 35MPa, while preventing creep and thermal fatigue.

Typical applications: main steam isolation at boiler outlet, temperature and pressure reduction in turbine bypass, and minimum flow regulation of feedwater pump.

1.2 Solar thermal power generation (molten salt tower/trough)

Valve requirements: molten salt globe valve, molten salt regulating valve, molten salt check valve, molten salt safety valve.

Technical challenges: addressing the corrosiveness of molten salt at 565℃, low-temperature solidification (melting point around 220℃), and thermal stress due to large temperature differences.

Typical applications: Inlet and outlet of cold/hot molten salt storage tanks, circulation pipelines of heat absorbers, and shut-off valves on the molten salt side of steam generators.

1.3 Compressed Air Energy Storage (CAES)

Valve requirements: large-diameter (DN800 and above) electric/pneumatic ball valves, butterfly valves, and regulating valves.

Technical challenges: rapid opening and closing of high-pressure air (10-20MPa), sealing reliability, and fatigue life.

Typical applications: gas storage inlet and outlet, expander front regulation, compressor interstage cutoff.

1.4 Nuclear power plant (conventional island + nuclear island auxiliary)

Valve requirements: nuclear-grade safety valves, gate valves, globe valves, and instrument valves.

Technical challenges: seismic resistance (SSE level), radiation resistance, and zero leakage sealing (ASME Class III).

Typical applications: main steam isolation, containment spray system, chemical and volume control system.

1.5 Gas-Steam Combined Cycle (GTCC)

Valve requirements: bypass valve, temperature and pressure reducing valve, gas shut-off valve.

Technical challenges: rapid response (second-level), high-frequency actions, and high-temperature gas sealing.

Typical applications: high-pressure bypass of waste heat boilers, emergency shut-off of fuel pipelines.