Safety valve for hot water - 3/4 "Fx1 "F; Kv 0,580; 10bar; KB20 DUCO IVAR.PV KB

Product detailed description

Hot water systems in residential and commercial buildings require reliable pressure protection to prevent damage from overpressure. This IVAR KB20 DUCO safety valve is commonly installed in heating and hot water circuits to release excess pressure when system limits are exceeded. It is suitable for use in domestic hot water systems, central heating installations and industrial applications where thermal expansion or pump overpressure may occur. The valve is designed for integration into closed-loop systems and is typically mounted near the heat source or in the main circulation line.

Correct installation and sizing are essential to ensure the valve operates within the required pressure range and maintains system integrity. The adjustable opening pressure allows for precise adaptation to the system’s operating conditions, making it suitable for a variety of configurations. The valve is intended for use with clean water and should be installed in a location that allows for easy access during maintenance or adjustment.

Technical parameters

Material	Brass CW617N
Operating temperature	0 °C
Nominal pressure	PN 16
Code	692025.100
Brand	IVAR

The nominal pressure rating of PN 16 indicates the valve is suitable for systems operating up to 16 bar. The adjustable opening pressure range from 6 to 10 bar allows for fine-tuning to match the system’s maximum allowable pressure. The operating temperature range from 0°C to 95°C ensures compatibility with both cold and hot water systems. These parameters are critical for selecting the correct valve size and pressure setting to ensure safe and efficient operation.Installation and connection The valve is equipped with 3/4 inch female and 1 inch female threaded connections, allowing for secure mounting in standard pipe systems. Prior to installation, the system should be depressurised and the valve’s opening pressure set according to the system’s requirements. It is important to ensure that the flow direction matches the valve’s design and that the installation location allows for unobstructed flow. Common installation errors include incorrect orientation, failure to set the pressure correctly, or installing the valve in a location with restricted access for maintenance.Compatibility and accessories This safety valve is compatible with standard copper or steel piping systems and can be used in conjunction with expansion vessels, pressure-reducing valves and temperature sensors. When ordering, the desired opening pressure must be specified, as the valve is supplied with a setting range of 6 to 10 bar in 1 bar increments. No additional accessories are included in the standard package.Technical background for designers The valve operates by opening when the system pressure exceeds the set threshold, allowing excess water to be discharged. The brass CW617N body provides good corrosion resistance and mechanical strength, making it suitable for long-term use in hot water environments. The design ensures minimal pressure drop during normal operation and reliable sealing when closed. The valve’s performance is influenced by the system’s hydraulic conditions, including flow rate and temperature fluctuations. Proper integration into the system requires consideration of the overall pressure balance and thermal expansion characteristics.Service and operation Periodic inspection is recommended to ensure the valve remains functional and free from blockages. The opening pressure should be verified during routine maintenance to confirm it matches the system’s requirements. No specific service intervals are provided in the technical data, but visual checks for signs of wear or leakage should be performed as part of standard system maintenance.Frequently asked questions

Can the valve be used in a closed hot water system?
Yes, the valve is suitable for closed hot water systems provided the operating pressure and temperature remain within the specified range of 6 to 10 bar and 0°C to 95°C.

Is the valve suitable for use with glycol-based heat transfer fluids?
No, the valve is designed for use with clean water only. Glycol-based fluids may affect the sealing properties and are not recommended.

Can the valve be adjusted after installation?
Yes, the opening pressure can be adjusted in 1 bar increments from 6 to 10 bar. However, any adjustments should be made by a qualified technician to ensure correct settings.

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