Safety valve for heating - 1/2 "Fx3/4 "F; Kv 0,540; 3,5bar; KD15 DUCO IVAR.PV KD

Product detailed description

Heating systems in residential and commercial buildings require reliable pressure management to prevent damage from overpressure. This safety valve is commonly installed in central heating circuits, particularly in systems with boilers, heat exchangers, and expansion vessels. It is used by installers and service technicians to ensure safe operation under varying load conditions. The valve is suitable for both new installations and system upgrades, where pressure regulation is critical for system longevity.

Proper integration into the system requires attention to the hydraulic balance and the positioning of the valve to allow for unobstructed flow of the heating medium. The brass construction ensures resistance to corrosion and wear, making it suitable for long-term use in environments with fluctuating temperatures and pressures.

Technical parameters

Material	Brass
Operating temperature	-10 °C
Nominal pressure	PN 16
Code	691520.35
Brand	IVAR

The operating temperature range of -10°C to +120°C allows for use in both cold and hot water heating systems. The nominal pressure rating of PN 16 indicates the valve's ability to handle system pressures up to 16 bar under normal conditions. The adjustable opening pressure range from 0.5 to 10 bar in defined steps allows for precise system pressure management, which is essential for accurate sizing and selection based on the system's design requirements.

Installation and connection

The valve features 1/2 inch female and 3/4 inch female threaded connections, requiring compatible fittings for secure installation. Installers should ensure the valve is positioned in a location that allows for easy access for adjustment and inspection. Prior to installation, verify the system pressure and temperature conditions to confirm compatibility with the valve's specifications. Common installation errors include incorrect orientation, which can affect the valve's response time, and failure to specify the required opening pressure at the time of ordering, which is essential for proper function.

Compatibility and accessories

This safety valve is designed for use with central heating systems and is compatible with standard heating circuits. When ordering, the required opening pressure must be specified from the available range of 0.5 to 10 bar in 0.5 and 1 bar increments. No additional accessories are included in the standard delivery, so the installer should ensure that the system includes all necessary components for secure mounting and operation.

Technical background for designers

The valve operates by allowing the heating medium to flow through when the system pressure exceeds the set opening pressure. The brass body provides good thermal conductivity and resistance to thermal expansion, ensuring stable operation over time. The design allows for integration into both closed and open heating systems, with the adjustment range enabling customization to match the system's operational profile. The valve's performance is influenced by the system's hydraulic characteristics and the frequency of pressure fluctuations, which should be considered during the design phase to optimize efficiency and service life.

Service and operation

Regular inspection is recommended to ensure the valve remains functional and properly adjusted. The brass construction requires no special maintenance, but the sealing surfaces should be checked for signs of wear or corrosion. No specific service intervals are provided in the technical data, but periodic checks are advised to confirm the valve's response to pressure changes and to verify that the set opening pressure remains accurate.

Frequently asked questions

Can the opening pressure be adjusted after installation?
Yes, the valve allows for adjustment within the specified range of 0.5 to 10 bar in defined steps. However, the initial setting must be specified at the time of ordering.

Is this valve suitable for use in closed heating systems?
Yes, the valve is designed for both closed and open heating systems, provided the operating conditions fall within the specified temperature and pressure range.

What is the maximum temperature the valve can handle?
The maximum operating temperature is +120°C, as stated in the technical specifications.

Can this valve be used with glycol-based heating media?
Compatibility with glycol-based media is not explicitly stated in the technical data. It is recommended to consult the manufacturer's technical data sheet for confirmation.