Pneumatex PNU expansion vessel, 300 l

Pneumatex – premium Swiss pressure maintenance technology. The brand offers solutions for managing expansion volume in heating and cooling systems. The original data plate of the vessel shows the Swiss company Stücklin & Cie AG.

PNU 300 – large volume, vertical expansion vessel. The 300-liter version provides expansion volume for larger mechanical systems. The correct sizing is determined by the system's water volume, temperature, and pressure conditions.

• 300 liters nominal volume: substantial vessel capacity; the actual expansion water volume that can be accommodated depends on the system pressures.
• Maximum 4 bar operating overpressure: the pressure limit according to the original data plate.
• Maximum 70 °C operating temperature: limit value to be considered when designing the vessel connection.
• 1.5 bar indicated pre-charge pressure: data plate value; the current pre-charge and the required setting for the system must be checked before installation.
• Manufactured in 1996, serial number 273566: equipment identified based on the original data plate.
• Vertical design: a solution that fits well in a mechanical room; connections and free installation space must be adapted to the site.

Technical source: the original data plate of the product. No verifiable manufacturer PDF could be found for this old PNU version; the data of today's Statico series cannot be automatically considered as the data of this vessel.

New price – clearly different model comparison. The exact new price of the old PNU 300 cannot be verified. Today's IMI Pneumatex Statico SU 300.6, 7102010 300-liter, 6 bar vessel is listed on heizung-billiger.de at a gross price of 1,684.20 EUR, including 19% German VAT; calculated net price 1,415.29 EUR. Source verification: 2026.10.05. This is a different model and a different pressure rating, not the exact new price of the 1996 PNU. The price applies to a single vessel; fittings, installation, and transport required for the system are separate items. New comparison model and price source.

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