Safety valve 2115, 4.0 bar, 5/4 inch 2115.32.153

Pressure protection in closed heating systems

Safety valve 2115.32.153 acts as a membrane protective mechanism that opens automatically when the set pressure is exceeded – in this case 4.0 bar. It is mainly intended for use in installations with closed domestic hot water heaters, where dangerous pressure spikes can lead to damage or failure. It operates reliably both in clean water and in glycol mixtures – provided the glycol content does not exceed 50%.

Design and installation

The housing is made of brass, and the internal components – also of corrosion‑resistant materials, including a spring with a galvanic coating. The membrane and seals are made of an elastomer resistant to ageing and high temperature, ensuring long‑term functionality even at a maximum working temperature of 110 °C. The valve features a design that prevents accidental adjustment of the setpoint – it cannot be manually “re‑set”. Installation should be performed vertically, with the inlet at the bottom, to ensure proper membrane operation and avoid blockage by deposits.

For the installer – service simplicity and compatibility

The valve can be completely disassembled – the upper insert is unscrewed, allowing periodic cleaning of the seat and membrane without replacing the entire unit. Version 2115 (not 2115N) does not have a replaceable stainless‑steel seat – but this does not imply lower reliability; service simply requires full replacement of the insert when damaged. It is compatible with systems of size G 1¼" (DN32), making it suitable for most modern safety assemblies and domestic boilers. The PZH certification confirms its compliance with Polish sanitary requirements – it can be installed in domestic water systems without restrictions.