Thermostatic valve double control - three-axis - 1/2 "xEK; right IVAR.VCD 2166 NDX

Product detailed description

Thermostatic valves are essential components in hydronic heating systems, particularly in residential and commercial buildings where accurate temperature control is required. This three-axis model is commonly used in radiator circuits to regulate heat output based on room conditions. The valve is designed for integration into systems with steel, copper or plastic piping, offering flexibility in installation. It is typically used in central heating applications where radiators are connected via threaded or compression fittings. The pre-set Kv value allows for initial flow optimisation before commissioning.

Installers working on modern heating systems often encounter mixed piping materials, and this valve is suitable for such hybrid systems. The valve’s compatibility with different pipe types ensures it can be used in both traditional and contemporary installations. It is commonly found in systems where precise temperature zoning is required, such as in multi-room buildings or where individual radiator control is necessary. The three-axis design ensures stable and accurate operation, even in systems with fluctuating flow conditions.

Technical parameters

Nominal pressure	PN 10
Weight	0.27 kg
Code	500431
Brand	IVAR

The PN 10 rating indicates the valve is suitable for systems operating at a maximum nominal pressure of 10 bar. This is important for sizing the valve to the system’s hydraulic requirements. The maximum operating temperature of 120°C means it is suitable for standard central heating systems. The pre-set Kv value allows for initial flow adjustment, reducing the need for manual tuning during commissioning. These parameters are essential for ensuring the valve is correctly selected for the system’s pressure and flow conditions.

Installation and connection

The valve is installed using a 1/2 inch external thread (EK) connection, which is compatible with standard steel, copper or plastic piping. The head of the valve features an M30 x 1.5 thread for attaching the thermostatic head. Installers should ensure the valve is positioned correctly on the radiator, typically on the right side of the unit. A common mistake is incorrect orientation, which can affect the valve’s performance. It is also important to verify that the pipe connections are clean and free of debris before tightening. Over-tightening the fittings can damage the valve body or cause leaks. The valve is supplied in packs of 10 or 80 units, suitable for bulk installation projects.

Compatibility and accessories

This valve is compatible with IVAR.TR compression fittings for copper piping, TA fittings for ALPEX piping and TP fittings for plastic piping. These accessories must be ordered separately to complete the installation. The valve is designed for use with standard thermostatic heads, which are not included in the package. Installers should ensure that the selected fittings match the pipe material and system requirements. For hybrid systems with mixed piping, the appropriate combination of fittings should be used to maintain system integrity and prevent leaks.

Technical background for designers

The three-axis design of the valve allows for precise temperature control by adjusting the flow of hot water through the radiator. The valve body is made from nickel-plated brass (CW617N), which offers good corrosion resistance and mechanical strength. This material is suitable for use in heating systems with water as the heat transfer medium. The valve integrates into the system by modulating flow based on the temperature sensed by the thermostatic head. The efficiency of the valve depends on correct installation, including proper orientation and secure connections. Long-term performance is influenced by the quality of the system water and the absence of debris in the piping.

Service and operation

The valve requires minimal maintenance under normal operating conditions. Regular checks should include verifying the tightness of the connections and ensuring the thermostatic head is functioning correctly. If the system experiences reduced performance or unusual noise, the valve should be inspected for blockages or wear. No specific service intervals are provided, but it is recommended to inspect the valve during routine system maintenance. If the valve is removed for cleaning or replacement, the system should be drained and flushed to prevent contamination of other components.

Frequently asked questions

Can this valve be used with plastic piping?
Yes, the valve can be connected to plastic piping using TP fittings. These fittings ensure a secure and leak-free connection.

Is the valve suitable for use with copper piping?
Yes, the valve is compatible with copper piping when used with IVAR.TR compression fittings. These fittings provide a reliable connection for copper systems.

Can the Kv value be adjusted after installation?
No, the Kv value is pre-set and cannot be adjusted after installation. This value is selected during the initial setup to match the system’s flow requirements.

Is the valve suitable for use in high-pressure systems?
No, the valve is rated for a maximum nominal pressure of PN 10. It is not suitable for systems operating above this pressure.