Diaphragm expansion vessel REFLEX S-18, 18L, 10 bar / 70 °C, threaded connection G3/4", light grey, for heating, solar and cooling systems, vertical, with non-replaceable membrane 8704100

Expansion vessel with diaphragm – stability and safety of the installation

The Reflex S-18 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 proper and safe operation of the entire system, protecting it from damage caused by excessive pressure. Whether you are an installer or an end user, you can count on the reliability and long service life of this component.

Construction and application

The Reflex S-18 is characterized by a solid construction and the use of a non-removable diaphragm, which translates into maintenance-free operation for a long time. Made of high-quality materials, coated with a durable epoxy paint in gray color, it is resistant to corrosion and mechanical damage. Designed for hanging mounting, thanks to the G3/4 threaded connection, it provides easy integration with the existing installation. It can be used in installations with up to 50% glycol content, making it an ideal solution for solar systems.

• Capacity: 18 liters – suitable for medium-sized domestic installations and small commercial facilities.
• Maximum working pressure: 10 bar – ensures safety even in demanding operating conditions.
• Maximum operating temperature: 70°C – allows use in standard heating and solar systems.
• Connection: G3/4” – standard size facilitating installation.
• Diaphragm: Non-removable – eliminates the need to service and replace the diaphragm during operation.

Advantages for professionals and users

The Reflex S-18 expansion vessel is a guarantee of peace of mind for both installers and end users:

• For installers:
  • Easy installation thanks to the threaded connection.
  • Maintenance-free design saves time and service costs.
  • Compliance with PN-EN 13831 and Directive 2014/68/UE – assurance of meeting safety requirements.
  • Wide availability of spare parts (if necessary).
• For end users:
  • Stable pressure in the installation – comfort of use and protection of heating devices.
  • Long service life thanks to the solid construction and non-removable diaphragm.
  • Protection against damage caused by excessive pressure – safety for the whole family.
  • Possibility of use with glycol - protection against freezing in solar systems.

This vessel is not only a technical element, but an investment in the reliability and durability of your heating or solar installation!