Safety valve Atmos WATTS STS - for aftercooling loop

Product detailed description

This safety valve is specifically designed for integration into central heating systems that use solid fuels such as coal, wood, or coke. It is commonly installed in systems with open or closed circuits, where the risk of boiling due to overheating is present. The device is typically used in conjunction with an aftercooling loop, ensuring that excess heat is dissipated to prevent damage to the boiler and piping. Installers working on industrial or residential heating systems with solid fuel boilers will find this valve essential for system safety and compliance with thermal regulation standards.

The valve is suitable for installations where the system may experience irregular thermal loads, such as in biomass boilers, wood-fired furnaces, or coal-fired heating units. It is often part of a larger safety system that includes pressure relief and temperature control mechanisms. The valve must be connected to a dedicated aftercooling circuit and a cold water supply to function correctly.

Technical parameters

The safety valve activates at 97°C and fully opens at 110°C, making it suitable for systems where overheating is a potential risk. The maximum flow capacity of 6.5 m³/h ensures efficient heat dissipation during critical conditions. The 3/4 inch FF connection is standard for most solid fuel boiler systems, simplifying integration. These parameters are essential for determining correct sizing and ensuring compatibility with the system's hydraulic and thermal requirements.

Installation and connection

Installation requires connecting the valve to the aftercooling loop and a cold water supply. The 3/4 inch FF connection must be securely tightened to prevent leaks. Installers should verify that the valve is positioned for optimal heat transfer and that the discharge path is unobstructed. Common mistakes include incorrect orientation, which can reduce efficiency, or failure to connect the cold water supply, which is essential for the valve to function as intended. It is also important to ensure that the system pressure does not exceed 10 bar, the maximum operating pressure of the valve.

Compatibility and accessories

This valve is compatible with most solid fuel boilers and heating systems that require an aftercooling loop. It is designed to work with standard 3/4 inch FF fittings and is suitable for integration into both open and closed heating circuits. No additional accessories are required for basic operation, but installers should ensure that the system includes a properly sized aftercooling loop and cold water supply. No related products are specified for this model.

Technical background for designers

The valve operates using two temperature sensors, ensuring redundancy in case one fails. When the system temperature exceeds 97°C, the valve begins to open, allowing hot water to be discharged and cooled. The materials used are selected for durability in high-temperature environments, ensuring long-term reliability. The integration of this valve into the system is critical for maintaining thermal balance and preventing damage from boiling. The efficiency of the valve is influenced by the design of the aftercooling loop and the availability of a cold water supply.

Service and operation

Regular inspection is recommended to ensure the valve is free from blockages and that the temperature sensors are functioning correctly. There are no specified service intervals in the provided data, but visual checks for wear or corrosion should be performed during routine maintenance. The valve should be tested periodically to confirm that it opens at the correct temperature and that the flow rate remains within the specified range. No specific maintenance procedures are outlined in the brief.

Frequently asked questions

Can the AVANSA Atmos WATTS STS be connected to an open heating system?
Yes, the valve is suitable for both open and closed heating systems, provided the aftercooling loop and cold water supply are correctly connected.

Is the valve compatible with wood-fired boilers?
Yes, it is designed for use with solid fuel boilers, including those that burn wood, coal, or coke.

What happens if one of the temperature sensors fails?
The second sensor continues to operate, ensuring the valve still functions correctly in the event of a single sensor failure.

What is the maximum temperature at which the valve fully opens?
The valve fully opens at 110°C, allowing maximum flow to cool the system during critical overheating conditions.