Automatic control and balancing valve for end devices - 1/2"; Kv 0,26 to 1,7 IVAR.CIM 788

Product detailed description

Automatic balancing valves are essential components in hydronic heating and cooling systems, ensuring stable flow and pressure conditions across terminal devices such as radiators, fan coils, and underfloor heating units. This valve is commonly used in residential, commercial, and industrial buildings where precise flow control is required. Installers working on multi-zone systems benefit from the valve’s ability to maintain consistent performance despite fluctuations in system pressure. The valve is typically installed in individual circuits to prevent overloading of pumps and to ensure even distribution of thermal energy.

Proper sizing and selection of this valve depend on the system’s hydraulic requirements, including the desired flow rate and pressure differential. The valve’s Kv value (flow coefficient) and pressure rating are key parameters that determine its suitability for a given application. The operating temperature range also plays a role in ensuring long-term reliability in both heating and cooling modes.

Technical parameters

Material	CW602N-M
Operating temperature	-10 °C
Nominal pressure	PN 25
Weight	0.334 kg
Code	788120
Brand	IVAR

The valve is constructed from CW602N-M, a copper alloy known for its durability and resistance to corrosion in water-based systems. The PN 25 pressure rating indicates it is suitable for systems operating at up to 25 bar. The operating temperature range of -10°C to +120°C allows for use in both heating and cooling applications. These parameters are critical for ensuring the valve functions correctly under the expected system conditions.

Installation and connection

The valve is installed in a straight section of the pipe to avoid turbulence and measurement inaccuracies. The 1/2 inch connection requires a compatible pipe fitting with a male or female thread, depending on the system configuration. Before installation, verify the direction of flow indicated on the valve body and ensure the system is depressurised and drained. Common installation errors include incorrect orientation, failure to align the valve with the flow direction, and neglecting to secure the valve properly to the pipe. After installation, a visual check of the sealing surfaces and connection integrity is recommended.

Compatibility and accessories

The IVAR 788120 is designed to work with the IVAR.CIM 311 electric thermal head for remote control of the closing function. This head must be ordered separately and connected according to the manufacturer’s instructions. The valve is compatible with standard heating and cooling systems using water as the heat transfer medium. It is not recommended for use with aggressive or chemically treated fluids unless specified in the technical data sheet.

Technical background for designers

The valve operates by automatically adjusting the flow to maintain a set pressure differential across the device. The CW602N-M material provides good mechanical strength and thermal conductivity, making it suitable for long-term use in fluctuating temperature environments. The valve integrates into the system by responding to changes in pressure and flow, reducing the need for manual adjustments. The presence of fixed end members allows for accurate flow measurement without the need to drain the system. The valve’s performance is influenced by the accuracy of the differential pressure setting and the stability of the system’s hydraulic conditions.

Service and operation

Routine maintenance is not required for the valve unless the system experiences unusual pressure fluctuations or flow imbalances. The valve should be inspected periodically for signs of wear or blockage, particularly in the internal components. If the valve is connected to an electric thermal head, ensure the electrical connections remain secure and free from corrosion. No specific service intervals are provided in the technical data sheet; however, any malfunction should be addressed by a qualified technician.

Frequently asked questions

Can the IVAR 788120 be used in both heating and cooling systems?
Yes, the valve is suitable for both heating and cooling applications as it has an operating temperature range from -10°C to +120°C.

What is the maximum pressure the valve can handle?
The valve is rated for a maximum pressure of PN 25, which means it can operate in systems with up to 25 bar of pressure.

Is the valve compatible with the IVAR.CIM 311 thermal head?
Yes, the valve is designed to work with the IVAR.CIM 311 thermal head for automatic control of the closing function.

Can the valve be installed in a vertical pipe?
Yes, but it is recommended to follow the manufacturer’s instructions regarding flow direction and installation orientation to ensure proper operation.