Safety valve for hot water - 1 "Fx5/4 "F; Kv 0,684; 6bar; KB25 DUCO IVAR.PV KB

Product detailed description

Hot water systems in residential and commercial buildings require reliable pressure protection to prevent overpressure conditions that can compromise system integrity. This safety valve is commonly used in heating and hot water installations where controlled pressure relief is essential. Installers working on central heating systems, domestic hot water circuits, and industrial water heating applications will find this valve suitable for integration into closed-loop systems. The valve is designed for installation in systems where pressure fluctuations are expected and where a defined pressure threshold must be maintained.

The valve is typically installed in the main hot water line or in the expansion tank circuit. It is suitable for use in systems with closed expansion vessels and is compatible with standard heating system configurations. The valve is not intended for use with steam or aggressive media. It is important to ensure the system is correctly sized and that the valve is installed in accordance with the manufacturer's specifications to ensure optimal performance and safety.

Technical parameters

Installation and connection

The valve is equipped with 1 inch female and 5/4 inch female connections, allowing for direct integration into standard pipe systems. Installers should verify the thread type and connection orientation to ensure a secure fit. The valve should be installed in a position that allows for easy access for inspection and adjustment. It is important to ensure the valve is installed in the correct direction, with the flow entering the larger connection and exiting through the smaller one. Common installation errors include incorrect orientation, failure to secure the valve properly, and neglecting to check for system compatibility prior to installation.

Compatibility and accessories

This valve is compatible with standard heating and hot water systems that require pressure relief. It is typically used in conjunction with expansion vessels and pressure-reducing valves. When ordering, the desired opening pressure must be specified, as the valve is available in 6, 7, 8, 9, and 10 bar settings. No additional accessories are included in the standard package. The valve is not compatible with steam systems or systems using aggressive media.

Technical background for designers

The valve operates on a spring-loaded principle, where the internal spring is pre-tensioned to a specific pressure setting. When the system pressure exceeds the set threshold, the valve opens to release excess pressure and protect the system. The brass construction provides good corrosion resistance and mechanical strength, making it suitable for long-term use in hot water applications. The valve is designed to integrate into closed-loop systems and should be selected based on the system's maximum operating pressure and flow requirements. The service life of the valve is influenced by the frequency of pressure fluctuations, the quality of the installation, and the maintenance schedule.

Service and operation

Regular inspection is recommended to ensure the valve remains functional and free from blockages. The valve should be checked for signs of wear, leakage, or incorrect pressure settings. No specific service intervals are provided in the technical documentation. If the valve fails to open at the set pressure or shows signs of internal damage, it should be replaced immediately. The valve should not be manually adjusted after installation unless the system requires reconfiguration.

Frequently asked questions

Can this valve be used in a closed expansion vessel system?
Yes, the valve is suitable for use in systems with closed expansion vessels as long as the operating pressure and temperature are within the specified range.

Is the opening pressure adjustable after installation?
No, the valve is factory-set to a specific pressure and must be ordered with the desired setting. Adjustments are not possible after installation.

Can this valve be used with glycol-based systems?
No, the valve is designed for use with water only and is not suitable for glycol or other non-water media.

What is the maximum operating temperature for this valve?
The valve is rated for operation up to 95°C, making it suitable for standard hot water systems.