Diaphragm expansion vessel REFLEX S-25, 25L, 10 bar / 70°C, threaded connection G3/4", light grey, for heating, solar and cooling systems, vertical, with non-replaceable membrane 8704200

Diaphragm expansion vessel – stability and safety of the installation

The Reflex S-25 diaphragm expansion vessel is a key component of closed heating, solar and cooling systems. Its task is to compensate for changes in liquid volume resulting from temperature fluctuations, maintaining constant pressure in the system. This ensures the correct and safe operation of the entire installation, protecting it from damage caused by excessive pressure.

The Reflex S-25 vessel is characterized by a solid construction and high quality workmanship. A durable epoxy coating in gray provides corrosion resistance and long-term protection. Inside the vessel there is a non-replaceable diaphragm that separates water from gas, preventing oxygen from entering the installation and minimizing the risk of corrosion of system components. This solution is particularly important in installations with glycol, where the diaphragm must be resistant to its action – in this model it withstands up to 50% glycol content.

Construction features and application

The Reflex S-25 expansion vessel is designed for suspended mounting, which facilitates its installation in various spaces. It has a standard G3/4” threaded connection, which ensures compatibility with most installation elements available on the market. The permissible operating pressure is 10 bar, and the operating temperature of the diaphragm is 70°C, which allows it to be used in a wide range of applications. The vessel complies with the PN-EN 13831 standard and has approval for use in accordance with Directive 2014/68/EU regarding pressure equipment – this guarantees safety and reliability.

• Expansion compensation: Automatically adjusts to changes in liquid volume in the installation, maintaining stable pressure.
• Corrosion protection: The non-replaceable diaphragm prevents oxygen from entering the water, minimizing the risk of corrosion of system components.
• Glycol resistance: The diaphragm is resistant to glycol content up to 50%, allowing the vessel to be used in solar and antifreeze installations.
• Safety: Compliance with PN-EN 13831 standards and Directive 2014/68/EU ensures a high level of safety.
• Durability: Made of high-quality materials guarantees long-lasting and trouble-free operation of the device.
• Easy installation: Suspended design and standard G3/4” connection facilitate installation of the vessel in various conditions.

By choosing the Reflex S-25 expansion vessel, you are investing in a reliable solution that will provide optimal operating conditions for your heating, solar or cooling installation for years to come. This product is valued by professionals for its quality of workmanship and compliance with applicable standards – and by end-users for its trouble-free operation and safety.