Often even straightforward problems are overlooked during design, installation, and maintenance. As a result, the system fluid’s quality is seriously compromised, and a potentially fatal series of events will occur. This dramatically reduces the efficiency of the system and causes premature failure of major system components.

Often it ends up in high operating costs for the plant and considerable expense for the owner and annoying inconveniences for the end-user. Parts need to be replaced, and the system must be cleaned persistently, and time and again, chemicals are applied. All this to achieve a “status quo” for the circulating fluid.

Break the cycle of work and costs

Breaking the cycle of work and costs starts with the pressurization system. A poorly designed, installed and maintained pressurization system can lead to negative pressures around the circuit. Air can be drawn in through automatic air vents, gaskets and micro leaks.

High pressure situations can lead to water being emitted through the safety valves and the subsequent frequent addition of further raw refill water. The introduction of fresh oxygen-rich water depletes any level of corrosion inhibitors that may be present. The onset of corrosion is then inevitable, and the cycle continues:

  • Air continually gets into the system.
  • Corrosion starts to occur.
  • Dirt & sludge begin to build-up.
  • The system is cleaned and treated.

Corrosion inhibitors do not affect the content of inert gases such as nitrogen and carbon dioxide that are present in large volumes and reduce the operating efficiency of the system.

SpiroExpand - Pressurisation assortment

A full range of solutions

Each heating or cooling system puts different demands on a pressure control system. Also, operators place additional requirements on the equipment of the pressure control systems, on the possible signal exchange with other parts of the installation or control system and operational reliability.

SpiroExpand covers a full range of solutions, from the most basic setup to the most complicated system. If you can’t find the right plan for you, we’ll be happy to create a customised set up specifically for your problem.

Using a pressurization unit means optimized pressure in your system
and saving space in your boiler room!

Our range of pressurisation units for residential and commercial projects

The new SpiroSelect, integrated total solution, selection tool

Our new product selection tool: SpiroSelect

The SpiroSelect tool is an upgrade of already existing Spirotech tools, combined in one clear online environment. Not only can you now choose an integrated total solution, but you can also select individual solutions in the areas of:

  • pressure maintenance,
  • water treatment,
  • air and dirt separation and
  • vacuum degassing.

Once you have made your choice, you will receive the selection in a clear file, including technical documentation of the chosen solutions. With that same overview, you can easily and quickly place an order or schedule an appointment for further advice.

Read more about SpiroSelect or Test it yourself

SpiroPress Expansion Tanks

Expansion vessels

These are ‘passive’ pressure management systems. A preset gas pressure in the membrane expansion vessel is used for pressure control. Because membrane expansion vessels do not have a make-up function, we ideally combine this type of pressure control with a vacuum degasser including a make-up function.

The expansion tanks are available in 12 configurations and with volumes between 2 -3000 litre and an operational pressure range from 3.0 – 25 bar.

Pressure vessels with fixed gas filling

A vacuum degasser is necessary to meet VDI standard

When degassing, we recommend following the VDI 4708 and VDI 2035-2 guidelines. In order to achieve the best possible degassing performance in heating and cooling installations, a separate vacuum degasser is necessary in addition to often used deaeration function in pressurisation systems’.

The degassing function available with many pressurisation systems, will reduce air related issues in closed water circuits, but they cannot guarantee to reach a gas pressure which is lower than the lowest pressure in the system (gas absorption condition). This means a vacuum degasser such as the Spirotech Superior is necessary to meet the VDI guidelines for degassing and deaeration, and for prevention of damage in water heating installations.

More information on vacuum and pressure step degassing

Our assortment vacuum degassers

Spirotech SpiroVent Superiors vacuüimontgassers

Connection diagrams of the SpiroExpand with the SpiroVent Superior

In the document below you find 2 connection diagrams with the SpiroExpand MultiControl Kompakt Solo in combination with our vacuum degassers:

  • SpiroVent Superior S400 and
  • SpiroVent Superior S600

A SpiroTrap dirt separator with magnet is also added to the connection diagram to ensure that your system water will be free from dirt and magnetite at any time.

Download the connection diagrams