Industrial thermal safety valves are specifically designed to protect thermal fluid systems from overpressure situations. Thermal fluid systems, also known as thermal oil systems or heat transfer systems, are commonly used in various industrial processes for heating, cooling, and temperature control. These systems typically use thermal fluids such as heat transfer oils or synthetic fluids to transfer heat from a heat source to a heat sink.

Here are some key features and considerations for industrial thermal safety valves:

1. Pressure Rating: Thermal safety valves are designed to handle the pressures typically encountered in thermal fluid systems, which can vary depending on the specific application and operating conditions. The pressure rating of the safety valve should match the maximum operating pressure of the thermal fluid system to ensure reliable overpressure protection.

2. Set Pressure: Similar to steam safety valves, the set pressure of thermal safety valves is the pressure at which they open to relieve excess pressure from the thermal fluid system. The set pressure should be carefully selected based on the maximum allowable working pressure of the system and any regulatory requirements.

3. Temperature Rating: Thermal safety valves are designed to withstand the high temperatures encountered in thermal fluid systems. The materials used in the construction of the safety valve should be able to withstand the temperature range of the thermal fluid without degradation or loss of integrity.

4. Valve Design: Thermal safety valves are typically designed as spring-loaded or pilot-operated valves, similar to steam safety valves. The valve design should be selected based on the specific requirements of the thermal fluid system and the desired level of precision and control.

5. Construction Materials: Thermal safety valves are commonly constructed from materials such as stainless steel, brass, or bronze to withstand the high temperatures and corrosive conditions present in thermal fluid systems. The materials used should be compatible with thermal fluids and resistant to corrosion to ensure long-term reliability.

6. Size and Capacity: Thermal safety valves come in various sizes and capacities to accommodate different thermal fluid system configurations and flow rates. The size of the safety valve should be selected based on the maximum fluid flow rate and the required relieving capacity to ensure adequate protection against overpressure conditions.

7. Certifications and Standards: Thermal safety valves should comply with relevant industry standards and certifications, such as ASME (American Society of Mechanical Engineers) standards and the National Board Inspection Code (NBIC). These standards ensure that the safety valves are designed, manufactured, and tested to meet stringent quality and performance requirements.

8. Installation and Maintenance: Proper installation and maintenance of thermal safety valves are critical to ensuring their reliable operation. Safety valves should be installed in accordance with manufacturer recommendations and applicable codes and standards. Regular inspection, testing, and maintenance are essential to identify and address any issues that may affect the performance of the safety valve.

Overall, industrial thermal safety valves play a crucial role in protecting thermal fluid systems and personnel from the hazards of overpressure conditions. Proper selection, installation, and maintenance of safety valves are essential to ensure the safety, reliability, and efficiency of thermal fluid systems in industrial applications.