Diaphragm expansion vessel REFIX DE-8, 8L, 10 bar / 70°C, threaded connection G3/4", blue, for DHW, fire protection, underfloor heating, geothermal, wall-mounted, with non-replaceable membrane 7301000

Expansion vessel for pressure stabilization in installations

The Refix DE-8 expansion vessel is a reliable device designed to maintain stable pressure in water systems, as well as in underfloor heating, geothermal and fire protection installations. Its construction based on a diaphragm membrane provides effective protection against the effects of water volume changes resulting from temperature fluctuations and compensates for water losses in the installation. This is crucial for the proper and safe functioning of the entire system.

The Refix DE-8 vessel is particularly recommended for applications where high corrosion resistance is required, e.g. in installations with heat pumps or systems using aggressive media. Thanks to its approval for contact with drinking water (PZH certificate), it can also be used in potable water installations. Its compact dimensions (height 316 mm, diameter 206 mm) and possibility of hanging mounting facilitate installation even in limited space.

Key features and benefits:

• Versatile application: ideal for DHW, underfloor heating, geothermal and fire protection installations – one vessel, many possibilities.
• Corrosion protection: all elements in contact with water are protected against corrosion, guaranteeing long-lasting and trouble-free operation.
• Stable pressure: maintains pressure within acceptable limits, protecting installation components from damage caused by excessive or too low pressure.
• Compact design: small dimensions and possibility of hanging mounting facilitate installation even in tight spaces.
• Safety confirmed: has a PZH certificate, which confirms its safety for health and the environment and meets the requirements of the pressure equipment directive 2014/68/EU (CE marking).
• Durable membrane: Equipped with a diaphragm membrane compliant with PN-EN 13831 - ensures reliable operation for a long time.

Technical specifications:

The Refix DE-8 vessel is characterized by a capacity of 8 liters and a maximum permissible operating pressure of 10 bar at a working temperature of up to 70°C. It has a G3/4" threaded connection, which ensures easy and tight installation in existing installations. The pre-pressure is 4.0 bar, and the weight of the device is 1.8 kg. The blue color facilitates identification of the vessel in the system. The vessel's construction has been designed to ensure reliability and long life of the device – the membrane is non-replaceable, eliminating the need to service this element.