Expansion Tank
Thermal Storage Solutions
Membrane pressurization solutions are common in building and industrial installations.
About the Expansion Tank
Expansion Tank Function
Membrane pressurization solutions are common in building and industrial installations.
Key Features
- Absorbs volume expansion in closed-circuit installations and keeps system pressure safe.
- Balances pressure fluctuations with membrane construction.
- Provides reliable operation in central heating and cooling systems.
Installation and Commissioning
During commissioning, pressure testing, flow adjustment, and temperature control must be performed. The Tanpera technical team provides field support and training.
After-Sales Services
System efficiency is preserved over the long term through periodic inspection and performance measurement.
Frequently Asked Questions
An Expansion Tank is membrane pressurization equipment that absorbs the volume increase caused by water heating in closed-circuit installations. Thanks to the flexible membrane, expanding water is stored in the tank; system pressure is kept within safe limits and remains under control before the safety valve operates.
In a closed circuit, water expands as it heats; this pressure rise can damage pipes, valves, and equipment. The expansion tank absorbs excess water and returns it to the system during cooling. Incorrectly sized tanks lead to frequent safety discharges and system faults.
Total system water volume, minimum and maximum operating temperature, and static height difference are taken into account. Pre-charge pressure is typically set as static pressure + 0.3 bar. The Tanpera engineering team calculates the appropriate tank volume and pre-charge from your project data.
Used in central heating, fan-coil and radiator circuits, chiller cooling lines, solar collector circuits, and industrial closed installations. A standard solution for medium and small building installations.
Because the membrane is exposed to pressure fluctuations, periodic pre-charge checks are recommended. An annual general inspection and safety valve test should be performed. When the membrane wears, the tank becomes ineffective; timely replacement is important for system safety.
On large-volume installations, with high static height difference, or on projects with rapid pressure changes, a pumped expansion unit (NOVA) gives more stable results. For medium-scale buildings, a membrane tank is often sufficient.
You can download the English brochure and user manual as PDF from the Documents tab on the product page. Up-to-date technical documents are published regularly in this area.
You can submit your project details via the Quote Form on the product page or contact our sales team at sales@tanpera.com. Our engineering team will get in touch for sizing and pricing based on your project data.
