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

Product detailed description

This three-way mixing valve is commonly used in residential and commercial heating systems to regulate and balance hot and cold water flows. It is suitable for applications such as underfloor heating, domestic hot water preparation, and radiant panel systems. The valve ensures accurate mixing ratios and stable operation even under fluctuating load conditions. Installers typically integrate it into closed-loop circuits where precise temperature control is essential.

The valve is designed for use with electric actuators and is compatible with proportional or modulating control systems. It is often found in central heating units, boiler circuits, and heat pump systems. The compact design allows for installation in tight spaces, while the durable brass construction ensures long-term reliability in aggressive environments.

Technical parameters

Material	Brass CW617N
Operating temperature	+120 °C
Servomotor torque	5 Nm
Nominal pressure	PN 10
Weight	0.855 kg
Code	501547
Brand	IVAR

The nominal flow coefficient (Kv 4) indicates the valve's capacity to pass a given volume of fluid under standard conditions, which is critical for proper sizing and matching with the system’s hydraulic requirements. The maximum operating temperature of +120°C means the valve can handle heated water or glycol-based fluids in high-temperature applications. The servomotor torque rating of 5 Nm determines the actuator compatibility and the force required to operate the valve against differential pressure. The PN 10 pressure rating confirms suitability for low-pressure systems up to 10 bar.

Installation and connection

The valve is connected using 3/4 inch threaded ports, typically with female BSP threads for compatibility with European plumbing standards. Before installation, ensure the system is depressurised and the valve is correctly oriented according to the flow direction indicated on the body. Use sealing tape or thread compound to prevent leaks. Check that the actuator mounting surface is clean and free of debris to avoid misalignment. A common mistake is incorrect port identification, which can lead to improper mixing and system inefficiency. Always verify the connection type and orientation with the system layout before tightening the fittings.

Compatibility and accessories

This valve is intended for use with electric actuators compatible with a minimum torque of 5 Nm. It is suitable for integration with proportional or on/off control systems. No additional accessories are required for basic operation. However, for complete functionality, an electric actuator and control unit should be selected based on the system’s automation requirements. No related products are available for this model.

Technical background for designers

The three-way mixing valve operates by dividing the incoming flow between two outlets, allowing for controlled blending of hot and cold media. The brass CW617N body provides good corrosion resistance and mechanical strength, making it suitable for long-term operation in wet environments. The PN 10 rating ensures the valve can withstand normal operating pressures in low-pressure heating systems. The choice of Kv value and torque rating is essential for ensuring the valve can respond effectively to control signals and maintain stable flow under varying load conditions. System designers should account for the valve’s pressure drop and flow characteristics during the sizing process to avoid overloading the pump or reducing system efficiency.

Service and operation

Regular visual inspections are recommended to check for signs of leakage, corrosion, or mechanical wear. Ensure the actuator is functioning smoothly and the valve stem moves freely without binding. If the system shows inconsistent temperature control, check for blockages in the ports or internal seat wear. No specific service intervals are provided in the technical documentation. Clean the exterior with a mild detergent if necessary, avoiding abrasive materials that could damage the finish.

Frequently asked questions

Can this valve be used in a domestic hot water circuit?
Yes, it is suitable for circuits requiring temperature control via mixing of hot and cold water, provided the system operates within the specified temperature and pressure limits.

Is this valve compatible with electric actuators?
Yes, the 5 Nm torque rating makes it compatible with actuators designed for similar specifications. Ensure the actuator mounting interface matches the valve body.

Can the valve be installed in a vertical position?
Yes, the valve can be mounted vertically or horizontally, depending on the system layout and space constraints. Always follow the flow direction markings on the body.

What media types are supported?
The valve is suitable for water and glycol-based fluids, provided they are within the operating temperature and pressure limits specified in the parameters.