Diaphragm expansion vessel AIRFIX-E-25, 25L, 4.0/10 bar / 70°C, with synthetic flow distributor, threaded connection R3/4", white RAL 9010, for DHW and water supply systems, hanging type 25243

Expansion vessel for DHW and booster systems

The Airfix-E-25 expansion vessel is a reliable solution for maintaining stable pressure in domestic hot water systems and booster systems. Designed for long-term operation, this vessel is characterized by high corrosion resistance and ensures water quality preservation. The internal coating prevents oxidation, and the butyl rubber (IIR) membrane does not affect the taste, color, or odor of the water.

Design and application

Airfix-E-25 is a flow-through vessel, meaning that the entire liquid flow is directed through its interior, eliminating water stagnation and minimizing the risk of bacterial growth. Equipped with a synthetic flow divider, this vessel provides optimal operating conditions and installation hygiene. Filling with nitrogen stabilizes the initial pressure, extending the service life of the device. Designed for wall mounting, thanks to the R3/4" threaded connection, it allows for easy integration into an existing system. It can be used with any storage water heater.

Key features and benefits

• Corrosion protection: Both the internal and external coating protect against corrosion on the water and nitrogen sides, guaranteeing a long service life.
• Installation hygiene: The flow-through design and synthetic flow divider minimize the risk of bacterial growth and ensure clean water.
• Stable pressure: Nitrogen filling maintains a constant initial pressure, ensuring efficient system operation.
• Versatility: Suitable for DHW, booster systems and can operate at temperatures from 1°C to 70°C (average continuous operating temperature).
• Safety: Has a PZH sanitary certificate, confirming compliance with sanitary standards.
• Membrane durability: The membrane made of butyl rubber is resistant to chemical and mechanical factors, ensuring reliable operation for a long time.
• Easy installation: The R3/4" threaded connection facilitates integration with the existing hydraulic installation.
• Glycol resistance: Can be used with a maximum glycol mixture concentration of 50%.

The Airfix-E-25 vessel is characterized by a capacity of 25 liters and a maximum working pressure of 10 bar, with a pre-pressure of 4 bar. The maximum operating temperature is 70°C, and the connection diameter is R3/4". The membrane is made of butyl rubber (IIR), and the housing is painted white (RAL 9010).

The Airfix-E-25 vessel is a solid choice for both professional installers looking for a reliable component for water systems and end-users who value comfort and safety.