Safety valve for hot water - 2 "Fx2 1/2F"; 900kW; 6bar; KB50 DUCO IVAR.PV KB

Product detailed description

Hot water safety valves are essential components in heating and sanitary systems to prevent overpressure situations that could lead to system failure or damage. This IVAR KB50 DUCO model is typically installed in residential and commercial buildings where hot water systems operate under variable thermal and hydraulic loads. Installers working on central heating systems, solar thermal installations or large hot water storage units will find this valve suitable for ensuring safe operation within defined pressure limits. The valve is designed for integration into systems with nominal pressures up to PN16 and operating temperatures from 0°C to +95°C.

Correct selection of a safety valve is crucial for system integrity. The valve must match the system's maximum allowable pressure and temperature range. It is also important to ensure that the valve is sized to handle the expected flow rate during pressure relief without causing excessive backpressure or flow resistance. The adjustable opening pressure range allows for fine-tuning to match the specific system requirements.

Technical parameters

Material	Brass Note
Operating temperature	0 °C
Nominal pressure	PN 16
Code	695065.60
Brand	IVAR

The operating temperature range of 0°C to +95°C means the valve is suitable for both cold and hot water systems. The PN16 rating indicates the valve can handle a maximum nominal pressure of 16 bar, which is higher than the maximum adjustable opening pressure of 10 bar. This ensures the valve remains functional and safe under normal and abnormal operating conditions.Installation and connection The valve is supplied with a 2" F x 2 1/2" F connection, which must be matched with the corresponding pipe sizes during installation. Installers should ensure that the valve is mounted in a vertical position with the discharge direction unobstructed to allow for proper pressure relief. A key step is to verify that the system pressure does not exceed the valve's maximum opening pressure setting. Common installation errors include incorrect orientation, failure to align the discharge direction, or using incompatible thread types. It is also important to check that the valve is installed upstream of any components that could restrict flow during pressure relief.Compatibility and accessories This safety valve is compatible with hot water systems operating within the specified pressure and temperature ranges. It is typically used in conjunction with expansion vessels, pressure-reducing valves and temperature controls. When ordering, the desired opening pressure must be specified (6, 7, 8, 9 or 10 bar) as it is not pre-set. No additional accessories are required for standard installation, but it is recommended to have a pressure gauge installed in the system for monitoring purposes.Technical background for designers The valve operates on a direct-acting spring-loaded principle, where the spring force is adjusted to control the opening pressure. The brass construction 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 responding to pressure fluctuations and releasing excess pressure through the discharge port. The service life is influenced by the frequency of pressure surges, the quality of the water (e.g., mineral content), and the accuracy of the pressure setting. Regular inspection of the valve's seating surface and spring condition is recommended to maintain efficiency.Service and operation Routine checks should include verifying the valve's seating integrity and ensuring that the discharge port is free from blockages. The spring setting should be rechecked periodically to confirm that the opening pressure remains within the specified range. No specific service intervals are provided in the brief, but it is advisable to inspect the valve during system maintenance cycles. If the valve shows signs of wear or fails to respond correctly to pressure changes, it should be replaced immediately to avoid system overpressure risks.Frequently asked questions

Can the opening pressure be adjusted after installation?
Yes, the valve is supplied with an adjustable opening pressure range from 6 to 10 bar in 1 bar steps. The setting must be selected at the time of order and cannot be changed after installation.

Is this valve suitable for use in solar thermal systems?
Yes, provided the system operates within the specified temperature range of 0°C to +95°C and the pressure does not exceed the valve's maximum opening pressure.

What is the maximum allowable operating temperature for this valve?
The valve is rated for operation up to +95°C, making it suitable for hot water applications but not for steam or high-temperature systems.

Can this valve be used in cold water systems?
Yes, the valve is suitable for cold water systems as its operating temperature range includes 0°C. However, the pressure must still be within the valve's specified limits.