1-General Standard Name
Straight-through welded stainless steel temperature sensitive automatic shut-off valve. Alternative names: Thermal actuated over-temperature safety cut-off valve, pipeline over-temperature emergency shut-off valve, instrument safety isolation valve.
2-Structural Features
Connection: Socket weld / butt weld integrated pipeline connection, high pressure bearing and reliable tightness for industrial high pressure fluid pipeline.
Working principle: Built-in thermal sensitive actuating element (fusible alloy / memory metal), purely mechanical passive structure without external power and signal; automatically fully closed when medium temperature reaches set threshold.
Material: 304/316 stainless steel, high pressure and corrosion resistance, stable under high temperature steam and chemical medium.
Function: Over-temperature emergency cut-off as pipeline safety protection equipment, automatically isolating pipeline without manual operation.
3-Application
1.Oil & Natural Gas Industry
• Supporting pipelines for gas pressure regulating stations, gas transmission branch pipelines, and CNG/LNG fueling equipment. When the medium temperature rises abnormally, the gas source is automatically shut off to prevent explosion and combustion risks.
• Over-temperature safety interlock protection for oil & gas wellhead sampling pipelines and high-pressure gathering and transmission pipelines.
2.Electric Power & Energy Industry
• Boiler steam-water sampling systems and steam turbine cooling pipelines in power plants, preventing precision instruments and transmitters from being damaged by steam overheating.
• Hydraulic oil pipelines in thermal power/photovoltaic power plants, automatically shutting off when oil temperature rises abnormally to protect the unit lubrication and oil system.
3.Chemical & Fine Chemical Industry
• Sampling pipelines for reactors and transport branch pipelines for flammable and explosive chemical media. For high-temperature volatile and easily polymerized media, emergency over-temperature shut-off is achieved to avoid leakage and fire hazards.
• High-purity gas and specialty gas transmission pipelines, ensuring safe isolation when abnormal temperatures occur in process systems.
4.Instrumentation & Laboratory Industry
• Front-end protection pipelines for chromatographic analysis and gas detection equipment, preventing high-temperature media from impacting and burning sensors.
• Laboratory high-pressure reaction gas circuits with passive safety shut-off, suitable for explosion-proof and non-electric-control safety applications.
5.New Energy, Marine & HVAC Industry
• Hydrogen refueling pipelines and lithium battery cooling pipelines, automatically shutting off cooling media in case of overheating to ensure the safety of energy storage equipment.
• Passive safety shut-off for marine hydraulic and fuel pipelines under high-temperature engine room environments, meeting marine explosion-proof requirements.
• HVAC heat-transfer oil pipelines, cutting off circulation when oil temperature exceeds limits to protect heat exchange equipment.
