Thermostatic double control valve - axial, 1/2" x EK

Product detailed description

Thermostatic double control valves are essential components in hydronic heating systems where precise temperature regulation is required. These valves are commonly used in residential and commercial buildings to control the flow of heated water to radiators or underfloor heating circuits. Installers working on central heating systems often integrate these valves to maintain consistent room temperatures and optimise energy efficiency. The axial design ensures smooth operation and minimal pressure drop across the valve, making it suitable for both low and medium-pressure systems. The valve is typically installed between the heating circuit and the radiator, allowing for automatic adjustment of flow based on the sensed temperature.

Correct sizing and selection of the valve is crucial to ensure it operates within the specified parameters. The valve must be compatible with the system’s pressure and temperature conditions and must be matched to the required flow rate. The Kv value, which indicates the flow capacity, can be pre-set to suit the specific application. This allows for flexibility in system design and ensures the valve can be adapted to different radiator sizes and thermal loads.

Technical parameters

Material	Nickel-plated brass CW617N
Operating temperature	+120 °C
Nominal pressure	PN 10
Weight	0.245 kg
Code	500827
Brand	IVAR

The operating temperature of +120°C and a pressure rating of PN 10 define the valve’s suitability for standard heating systems. The material, nickel-plated brass CW617N, ensures resistance to corrosion and mechanical wear, making it durable for long-term use. These parameters are critical for determining the valve’s compatibility with the system and for ensuring it can handle the expected thermal and hydraulic loads without failure.

Installation and connection

The valve is designed for connection to copper or plastic piping using compression fittings. The 1/2 inch connection allows for integration with standard pipe sizes used in heating systems. The head of the valve features an M30 x 1.5 thread for attaching the thermostat head or actuator. During installation, it is important to ensure that the valve is fully open before tightening the compression fittings to prevent damage to the internal components. Common installation mistakes include overtightening the fittings, which can cause leaks or damage the sealing surfaces, and incorrect orientation of the valve, which can affect its performance. The valve should be installed in a location that allows for easy access to the thermostat head and where it is not exposed to excessive vibration or mechanical stress.

Compatibility and accessories

This valve is compatible with a range of thermostat heads and actuators designed for axial control valves. It can be connected to copper piping using IVAR.TR compression fittings or to plastic piping using TA (ALPEX) or TP fittings. When ordering, it is important to ensure that the correct compression fittings are included to match the piping material. The valve is typically supplied in packs of 10 units per bag or 80 units per box. No additional accessories are required for basic operation, but the system may require a thermostat head or control unit for full functionality.

Technical background for designers

The valve operates based on a bimetallic or wax thermostat element that expands or contracts in response to temperature changes. This movement adjusts the position of the valve plug, regulating the flow of hot water through the radiator. The nickel-plated brass body provides good thermal conductivity and resistance to corrosion, ensuring long-term reliability. The valve is designed to integrate with standard heating systems and can be used in both individual radiator circuits and larger heating loops. The service life and efficiency of the valve are influenced by the quality of the installation, the cleanliness of the system water, and the frequency of maintenance checks.

Service and operation

The valve requires minimal maintenance, but periodic checks should be performed to ensure the thermostat element is functioning correctly and that there are no leaks at the compression fittings. The valve should be inspected for signs of wear or corrosion, particularly at the sealing surfaces. If the valve becomes unresponsive or fails to regulate the flow correctly, the thermostat element may need to be replaced. No specific service intervals are provided, but it is recommended to inspect the valve during routine system maintenance.

Frequently asked questions

Can this valve be used with plastic piping?
Yes, the valve is compatible with plastic piping when using TP compression fittings. The connection is made via a 1/2 inch thread.

Is the Kv value adjustable?
The Kv value is pre-set and can be adjusted according to the required flow rate for the specific application.

What is the maximum operating temperature?
The valve is rated for a maximum operating temperature of +120°C, making it suitable for standard heating systems.

Can the valve be used in a central heating system?
Yes, the valve is suitable for use in central heating systems where temperature-controlled flow regulation is required.