Thermostatic relief valve - 5/4"; Kv 12; 61° C IVAR.TERMOVAR

Product detailed description

This thermostatic relief valve is commonly installed in residential and commercial solid fuel heating systems. It is used to regulate the temperature in the boiler circuit and prevent damage caused by low-temperature corrosion and soot accumulation. The device ensures safe and efficient operation by releasing excess heat when the set temperature threshold is reached. It is typically found in systems where thermal stability and long-term reliability are critical.

The valve is designed for integration into closed-loop heating systems and is suitable for use with traditional solid fuel boilers. Installers should ensure proper orientation and positioning to allow for correct flow direction and pressure regulation. The device is intended for use in environments where the maximum operating temperature is 120°C and the nominal pressure is PN 10.

Technical parameters

Installation and connection

The valve is equipped with a 5/4 inch threaded connection, which must be matched with the corresponding fitting on the boiler or pipe. During installation, it is important to verify the flow direction indicated on the valve body and align it accordingly. A common mistake is incorrect orientation, which can lead to improper function or damage. The device is typically mounted in a vertical position to ensure correct drainage and thermal response. No tools are required to adjust the flow rate under pressure, allowing for fine-tuning during commissioning.

Compatibility and accessories

This thermostatic relief valve is compatible with solid fuel boilers operating within the specified temperature and pressure limits. It is intended for use with standard heating circuits and does not require additional accessories for basic operation. However, it is recommended to combine it with a temperature sensor and control unit for enhanced system monitoring. No related products are listed for this model.

Technical background for designers

The valve operates based on a thermostatic insert that responds to temperature changes in the fluid. When the set point of 61°C is exceeded, the insert expands, opening the valve to release excess heat. The DZR brass material offers good mechanical strength and resistance to thermal cycling, making it suitable for long-term use in heating systems. The design allows for integration into both new and retrofit systems, provided the existing piping and fittings match the 5/4 inch thread specification. The performance of the valve is influenced by the system’s hydraulic balance and the accuracy of the temperature setting.

Service and operation

Regular visual inspections are recommended to check for signs of wear, leaks, or blockage. The thermostatic insert can be replaced without removing the entire valve, simplifying maintenance. No specific service intervals are provided in the technical documentation. To ensure continued operation, the device should be tested periodically by simulating a temperature rise to confirm the valve opens and closes as expected.

Frequently asked questions

Can the valve be used in systems with higher operating temperatures?
No, the maximum operating temperature is limited to +120°C as specified in the technical data.

Is it possible to adjust the flow rate without tools?
Yes, the valve allows for adjustment of the functional flow under pressure without the need for tools.

Can the thermostatic insert be replaced separately?
Yes, the insert is designed to be replaced independently of the main valve body.

What is the purpose of the 5/4 inch connection size?
The 5/4 inch thread is used to connect the valve to the boiler or pipe, ensuring a secure and leak-free fit.