Safety valve for hot water - 1 "Fx5/4 "F; Kv 0,684; 7bar; KB25 DUCO IVAR.PV KB

Product detailed description

Hot water safety valves are essential components in heating and plumbing systems where pressure regulation is critical for system integrity and safety. Installers and technicians commonly encounter these valves in residential and commercial buildings, particularly in systems where thermal expansion or pump overpressure can occur. This valve is typically used in closed hot water circuits, such as in domestic hot water storage systems, where pressure fluctuations are common. It ensures that the system remains within safe operating limits by releasing excess pressure when thresholds are exceeded.

Proper sizing and selection of a safety valve depend on the system's maximum operating pressure, flow rate, and temperature range. This model is designed for use in systems with a nominal pressure rating of PN 16 and a temperature range from 0 °C to +95 °C. The adjustable opening pressure allows for customisation to match the specific requirements of the system, ensuring optimal performance and safety.

Technical parameters

Material	Brass Note
Operating temperature	0 °C
Nominal pressure	PN 16
Code	692532.70
Brand	IVAR

The operating temperature range of 0 °C to +95 °C makes this valve suitable for a wide range of hot water systems. The PN 16 rating indicates the valve is designed to handle a nominal pressure of 16 bar. The adjustable opening pressure range of 6 to 10 bar allows the installer to configure the valve to the system's specific pressure requirements. The Kv value of 0.684 is used to calculate the flow capacity of the valve under standard conditions, which is important for ensuring proper sizing in relation to the system's hydraulic needs.

Installation and connection

The valve is equipped with 1 inch female and 5/4 inch female connections, which must be verified for compatibility with the system's piping. During installation, it is important to ensure that the valve is mounted in a location that allows for easy access for inspection and adjustment. The direction of flow should be confirmed according to the manufacturer's markings to prevent incorrect installation. A common mistake is not securing the valve properly, which can lead to leaks or improper pressure relief. Always check the system pressure before commissioning to ensure the valve is set to the correct opening pressure.

Compatibility and accessories

This valve is compatible with standard brass piping and fittings used in hot water systems. It is intended for use in conjunction with pressure regulators or expansion vessels to manage system pressure effectively. When ordering, the desired opening pressure must be specified, as the valve is supplied with a pre-set pressure range from 6 to 10 bar in 1 bar increments. No additional accessories are included in the standard package.

Technical background for designers

The valve operates on a spring-loaded mechanism that opens when the system pressure exceeds the set threshold. The brass body provides good corrosion resistance and mechanical strength, making it suitable for long-term use in hot water environments. The valve integrates into the system by being installed downstream of the pressure source, such as a pump or heater. The service life and efficiency of the valve are influenced by the frequency of pressure fluctuations and the quality of the installation. Regular inspection of the spring and seating surface is recommended to ensure continued performance.

Service and operation

While no specific service intervals are provided, it is advisable to inspect the valve periodically for signs of wear, corrosion, or leakage. The seating surface should be checked for any deposits that may affect the sealing capability. If the valve has been activated due to overpressure, it should be inspected for damage and reset if necessary. No special tools are required for routine checks, but any adjustments to the opening pressure should be performed with care to avoid misalignment.

Frequently asked questions

Can this valve be used in a closed hot water system?
Yes, it is suitable for closed hot water systems where pressure regulation is required. The adjustable opening pressure allows it to be configured for such applications.

Is the valve suitable for temperatures above +95 °C?
No, the maximum operating temperature is +95 °C as specified in the technical data. Exceeding this temperature may affect the valve's performance and integrity.

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 with care to ensure the correct pressure setting is maintained.

What should be considered when selecting the opening pressure?
The opening pressure should be selected based on the system's maximum operating pressure to ensure that the valve activates only when necessary. It should not be set too low to prevent unnecessary discharge of water.