Pneumatic High-temperature Control Valve

2025-09-08

As a core device in industrial high-temperature fluid control, the pneumatic high-temperature control valve achieves stable and precise regulation under harsh conditions through pneumatic actuation and high-temperature resistant structural design. Powered by compressed air, it drives the valve plug via a piston-type or diaphragm-type cylinder, coupled with high-temperature resistant sealing materials and thermal insulation structures, enabling reliable long-term operation in environments ranging from -30°C to 70°C.

Core Technical Features

High-temperature Materials: The valve body is cast from alloy steel (such as chrome-molybdenum steel, Inconel alloy), and the valve plug surface is hardened or overlaid with high-temperature alloys to withstand thermal shock and oxidation corrosion.

Thermal Insulation & Sealing Design: The valve bonnet is equipped with multi-layer ceramic fiber insulation sleeves to block heat conduction. Sealing components use high thermal conductivity materials like flexible graphite and metal wound gaskets, maintaining good sealing performance at high temperatures with a leakage class reaching ANSI IV.

Rapid Response: The pneumatic actuator features sensitive response, with full-stroke action time of only 3-8 seconds. It supports air-to-open/air-to-close fail-safe modes to ensure safe shut-off under emergency conditions.

Application Scenarios

Iron & Steel Metallurgy: Regulates high-temperature flue gas flow in blast furnace hot stoves and converter flue ducts.

Power Energy: Controls high-temperature steam pressure in supercritical boilers and waste heat power generation systems.

Petrochemical Industry: Manages high-temperature medium flow in cracking furnace feed pipelines and catalytic reforming units.

Glass & Building Materials: Precisely regulates combustion air and gas flow in kiln combustion systems.

With excellent high-temperature adaptability and reliable pneumatic actuation performance, the pneumatic high-temperature control valve serves as a key device for ensuring stable process operation in metallurgy, energy, and other industries. Its modular design also significantly reduces maintenance difficulty and downtime costs.

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