Pressure expansion vessels
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Pressure expansion tanks - an essential element of the installation
Pressure expansion vessels are key components of many hydraulic systems. Their main task is to compensate for changes in the volume of the heating or cooling medium. Thanks to them, the installation works stably and safely. At Onninen we offer a wide selection of these devices. Our range includes products from renowned brands. These include Global Water, Reflex and Flamco Meibes.
Expansion vessels are used in various types of installations. They are most often found in central heating systems. They are also used in domestic hot water systems. They are also used in cooling installations. The correct selection of the expansion tank is crucial to the efficiency of the entire system.
Types of pressure expansion tanks offered by Onninen
Our range includes various types of these devices. Here are the most popular ones:
- Expansion vessels for what
- Expansion vessels for domestic hot water
- Pressure expansion vessels for heating systems
- Pressure expansion vessels for utility water
Each of these types has its specific characteristics and uses. Coating vessels ensure stable operation of the heating system. They compensate for changes in water volume caused by temperature fluctuations. In turn, domestic hot water tanks protect the system from excessive pressure increases. This is especially important when heating water.
Pressure diaphragm vessels are advanced technical solutions. They are divided into two chambers separated by a flexible membrane. One chamber is filled with gas under pressure. The other contains the working medium of the installation. This solution ensures excellent pressure control in the system.
How to choose the right pressure expansion tank?
The correct selection of the expansion tank is a key issue. It directly affects the efficiency and safety of the installation. When choosing, you should take into account several important parameters. These include:
- Total capacity of the installation
- Maximum operating temperature
- Initial pressure in the vessel
- Safety valve opening pressure
In everyday practice, we often come across questions about choosing a vessel. Customers usually need help in determining the right capacity. This is understandable, because the wrong choice can lead to serious problems. A vessel that is too small will not provide adequate compensation. On the other hand, one that is too large generates unnecessary costs.
Our experience shows that it is worth consulting a professional before making your selection. At Onninen we offer expert advice in this area. Our specialists will help you choose the optimal solution. They will take into account the specifics of the specific installation.
Practical applications of pressure expansion vessels
Pressure expansion vessels are used in various projects. We recently participated in the modernization of the heating system of a large office building. The key element was the replacement of outdated expansion vessels. We used modern pressure diaphragm vessels. The effect was a significant improvement in the stability of the entire installation.
Another interesting case was a project for an apartment complex. The challenge was to ensure stable pressure in the domestic hot water system. We used specialist expansion vessels for domestic hot water. Thanks to this, we managed to eliminate the problem of pressure fluctuations. Residents gained the comfort of using water with constant pressure.
In the case of large industrial facilities, extensive systems are often used. They can include several expansion tanks working in parallel. This solution provides additional safety and flexibility. It also allows for easier maintenance without having to shut down the entire installation.
It is worth mentioning the use of expansion tanks in solar systems. These installations are characterized by large temperature fluctuations. A properly selected expansion tank is absolutely necessary here. It ensures safe operation of the system in various weather conditions.
Pressure expansion vessels are not only an element of the installation, but also a guarantee of its long-term and failure-free operation. At Onninen, we are aware of their key role. That is why we focus on the highest quality products. We offer expansion vessels from renowned manufacturers. We also provide expert advice on their selection and installation.
Our offer includes a full range of sizes and types of expansion tanks. Thanks to this, we are able to meet a variety of requirements. Regardless of whether it is a small home installation or an extensive industrial system. We will always find the optimal solution.
At Onninen, we focus on comprehensive customer service. In addition to the expansion tanks themselves, we also offer assembly accessories. These include safety valves and connection couplings. This allows our customers to complete all the necessary elements in one place.
Pressure expansion vessels are an investment in the safety and efficiency of the installation. We encourage you to take advantage of our offer and expert advice. Together we will choose the perfect solution for your needs.




























