A membrane expansion pressure vessel designed for use in closed solar, heating, and cooling systems. The vessel is equipped with a non-replaceable membrane and complies with the DIN EN 13831 standard. This type of vessel is designed to ensure compensation for volume changes of the medium depending on the temperature, thereby protecting the entire system from overpressure.

Technical Specifications

• Volume: 18 litres
• Maximum operating pressure: 10 bar
• Pre-charge pressure (factory setting): 1.5 bar
• Temperature range: -10...120 °C (max. operating temperature 70 °C)
• Connection: G 3/4"

Materials and Construction

• Membrane: Butyl
• Body: Grey epoxy coating
• Non-replaceable membrane for volumes up to 33 litres

Additional Features

• Certification according to the Pressure Equipment Directive 2014/68/EU
• Suitable for systems with antifreeze concentration of 25–50%