Safety valve for hot water - 3/4 "Fx1 "F; Kv 0,580; 6bar; KB20 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. This model is commonly used in residential and commercial buildings, including apartment complexes, industrial facilities, and public buildings. Installers and service technicians typically encounter these valves in central heating systems, hot water circulation loops, and thermal storage units. The valve ensures that pressure does not exceed safe levels, preventing damage to pipes, fittings, and other system components.

Correct selection and installation of a safety valve depend on the system's operating conditions, including maximum pressure and temperature. This valve is designed for systems with a nominal pressure of PN 16 and a temperature range from 0°C to 95°C. The adjustable opening pressure allows for precise adaptation to the system's requirements.

Technical parameters

Material	Brass Note
Operating temperature	0 °C
Nominal pressure	PN 16
Code	692025.60
Brand	IVAR

The valve’s operating temperature range and nominal pressure are key factors in system design and component compatibility. The adjustable opening pressure range from 6 to 10 bar in 1 bar increments allows for fine-tuning to match the system’s pressure profile. The flow coefficient (Kv) of 0.580 indicates the valve’s capacity to release water under pressure, which is important for determining the size and number of valves required for a given system.

Installation and connection

The valve is installed in the hot water system to relieve excess pressure and prevent overpressure conditions. It features 3/4 F x 1 F threaded connections, which must be aligned with the corresponding pipe fittings. Before installation, the system should be depressurised and the valve’s opening pressure setting verified. Common installation errors include incorrect thread orientation, failure to specify the desired pressure setting during ordering, and improper alignment with the system’s flow direction. The valve must be mounted in a location that allows for easy access for maintenance and inspection.

Compatibility and accessories

This safety valve is compatible with standard hot water systems operating within the specified pressure and temperature range. It is typically used in conjunction with pressure-reducing valves, expansion vessels, and temperature sensors. When ordering, the desired opening pressure must be specified as 6, 7, 8, 9, or 10 bar. No additional accessories are included in the standard package.

Technical background for designers

The valve operates on a spring-loaded principle, where the internal spring holds the valve closed until the system pressure exceeds the set 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 being connected in parallel with the main flow path. The service life and efficiency of the valve are influenced by the frequency of pressure fluctuations, the quality of the water, and the presence of impurities or scaling. Regular inspection and cleaning help maintain performance.

Service and operation

Routine inspection is recommended to ensure the valve functions correctly. The opening pressure should be checked periodically using a pressure gauge to confirm it remains within the set range. The valve should be tested manually to verify that it opens and closes without obstruction. No specific service intervals are provided in the brief; however, any signs of leakage or malfunction should be addressed immediately.

Frequently asked questions

Can the valve be used in cold water systems?
No, the valve is designed for hot water systems with a minimum operating temperature of 0°C and a maximum of 95°C.

Is it possible to adjust the opening pressure after installation?
No, the opening pressure must be specified at the time of ordering and cannot be changed after the valve is manufactured.

What is the maximum temperature the valve can handle?
The valve is rated for a maximum operating temperature of 95°C.

Can the valve be installed in a vertical position?
Yes, the valve can be mounted vertically as long as the flow direction and pressure orientation are maintained according to the manufacturer’s instructions.