Mixing valve - three-way, 3/4"; Kv 6; 5 Nm

Product detailed description

Three-way mixing valves are essential components in hydronic heating systems, particularly in applications where precise temperature control is required. These valves are commonly used in residential and commercial buildings to regulate the mixing of hot and cold water or heating media. Installers and technicians often encounter these valves in underfloor heating systems, radiators, and heat emitters where flow and temperature adjustments are necessary for system efficiency and comfort.

In installations involving variable flow conditions, the correct selection and positioning of a three-way mixing valve ensures balanced operation and prevents overheating or underheating in different zones. The valve must be sized according to the system’s flow requirements and integrated with compatible control actuators to maintain stable operation. The integration of such valves requires attention to hydraulic balance and system compatibility to avoid pressure drops or flow restrictions.

Technical parameters

Material	Brass CW617N
Operating temperature	+120 °C
Actuator torque	5 Nm
Nominal pressure	PN 10
Weight	0.858 kg
Code	501548
Brand	IVAR

The valve's operating temperature limit of +120°C makes it suitable for systems with high-temperature heating media, such as those using condensing boilers or solar thermal systems. The PN 10 pressure rating indicates it is designed for low-pressure applications, typically found in domestic and light commercial heating systems. The 5 Nm torque requirement is important when pairing with servomotors or actuators, ensuring the selected actuator can provide sufficient force for reliable valve operation.

Installation and connection

The valve features 3/4 inch threaded connections, commonly used in European plumbing and heating systems. During installation, it is important to ensure that the valve is positioned to allow free flow in all directions and that the actuator is aligned correctly with the valve stem. Installers should verify that the system pressure does not exceed PN 10 and that the media temperature remains within the specified range. Common installation errors include incorrect orientation, which can lead to flow imbalance, and failure to secure the actuator properly, resulting in inconsistent valve positioning.

Compatibility and accessories

This three-way mixing valve is intended for use with servomotors or actuators that provide a minimum of 5 Nm of torque. It is compatible with standard heating system components such as thermostatic heads, room controllers, and building management systems. When installing, ensure that the control system is calibrated to match the valve's flow characteristics. No additional accessories are required for basic operation, but integration with a control system may require wiring and configuration according to the manufacturer's guidelines.

Technical background for designers

The valve operates by redirecting flow between two inlets and one outlet, or one inlet and two outlets, depending on the system configuration. The CW617N brass construction provides good corrosion resistance and mechanical strength, making it suitable for long-term use in heating systems. The valve's Kv 6 flow coefficient determines its capacity to pass media at a given pressure differential, which is crucial for system sizing. Designers should consider the valve's operating temperature and pressure limits when integrating it into a system to ensure long-term reliability and efficiency.

Service and operation

Regular inspection of the valve is recommended to ensure smooth operation and to detect any signs of wear or leakage. The brass body requires no special maintenance, but the actuator should be checked for proper alignment and torque output. No scheduled service intervals are specified in the technical data, but any irregularities in flow or temperature control should be investigated promptly to avoid system inefficiencies or damage.

Frequently asked questions

Can this valve be used with a servomotor requiring 5 Nm of torque?
Yes, the valve is specifically designed for use with servomotors that provide a minimum of 5 Nm of torque, ensuring reliable operation.

Is the valve suitable for use with hot water at 120°C?
Yes, the valve has an operating temperature limit of +120°C, making it suitable for systems with high-temperature media.

What connection size is available for this valve?
The valve is equipped with 3/4 inch threaded connections, commonly used in European heating and plumbing systems.

Can this valve be used in a two-pipe heating system?
Yes, the three-way design allows for integration into two-pipe systems by redirecting flow between the inlet and outlet ports as required by the control system.