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.

Doorbreek de cyclus van hoge exploitatiekosten

Hoge exploitatiekosten worden veroorzaakt door een niet correct ontworpen en verkeerd geïnstalleerd expansiesysteem. Bij een verkeerd geïnstalleerd expansiesysteem kan er een negatieve druk in het systeem ontstaan, waardoor er op diverse plaatsen lucht in het systeemwater kan komen, denk hierbij aan automatische ontluchters, pakkingen en niet-diffusiedichte leidingen. Een te hoge systeemdruk zorgt ervoor dat veiligheidsventielen open gaan, met een drukval tot gevolg. Het systeem moet dan weer met enige regelmaat bijgevuld worden met (wederom) zuurstofrijk water waardoor het corrosieproces wordt versneld.

● Er komt voortdurend lucht in het systeem.
● Er ontstaat corrosie.
● Er vormt zich steeds meer roest en andere vervuiling.
● Het systeem moet worden gereinigd en behandeld.

SpiroExpand - Pressurization 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 customized set up specifically for your problem.

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

Solutions that Impress

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.

Pressurization, the key

Our range of pressurization units for residential and commercial projects

SpiroExpand PicoControl Kompakt

SpiroExpand PicoControl Kompakt

The PicoControl Kompakt comes in six possible versions (45, 75, 125, 200, 300 or 500 liters). Operating pressure up to 4.0 bar is possible

  • Maximum safety temperature in the system: 110°C (with auxiliary tank)
  • The maximum temperature at the point of connection: 70°C
  • Maximum operating pressure (PN): 4 bar

The SpiroExpand PicoControl Kompakt is equipped with a single pump (1x 100%) and a single valve (1x 100%)

More about the PicoControl Kompakt

SpiroExpand MultiControl Kompakt

The Multicontrol Kompakt comes in 104 possible versions, with 5 possible container volumes: 75, 125, 200, 300 or 500 liters. Two further containers can be added.

  • Operational pressure range: 1.0 – 8.1 bar
  • Maximum expansion volume: 75 – 1,500 litres
  • Maximum thermal output: 450 – 2,500 kW
  • The maximum temperature at the point of connection: 70°C (over 70°C possible with auxiliary tank)
  • Maximum safety temperature in the system: 110°C
  • Maximum operating pressure (PN): 10 bar
SpiroExpand MultiControl Kompakt

Our Multicontrol Kompakt comes in 5 series and several Partner packages with the following configurations:

  1. MultiControl Kompact – SOLO, Single pump 1 x 100 %, Single valve 1 x 100 %
  2. MultiControl Kompact – DUO, Double pump 2 x 50 %, Single valve 1 x 100 %
  3. MultiControl Kompact – DUO / TWIN, Double pump 2 x 50 %, Double valve 2 x 100 %
  4. MultiControl Kompact – MAXI, Double pump 2 x 100 %, Single valve 1 x 100 %
  5. MultiControl Kompact – MAXI / TWIN, Double pump 2 x 100 %, Double valve 2 x 100 %
  6. MultiControl Kompact – Partner packages

More about the MultiControl Kompakt

Download the free BIM files of our MultiControl Kompakt products

SpiroExpand MultiControl Modular

The MultiControl Modular comes in 78 versions and 12 vessel volumes: 200 to 10,000 litres. Additional vessels can be added.

  • Operational pressure range: 1.0 – 16 bar
  • Pressure rating: PN10, PN16, PN25
  • Maximum expansion volume: 200 – 50,000 litres
  • Maximum thermal output: 450 – 100,000 kW
  • The maximum temperature at the point of connection: 70°C (over 70°C with auxiliary tank)
  • Maximum safety temperature in the system: 110°C
SpiroExpand MultiControl Modular

Our Multicontrol Modular comes in 5 series with the following configurations:

  1. MultiControl Modular – SOLO, Single pump 1 x100 %, Single valve 1 x 100 %
  2. MultiControl Modular – DUO, Double pump 2 x 50 %, Single valve 1 x 100 %
  3. MultiControl Modular – DUO / TWIN, Double pump 2 x 50 %, Double valve 2 x 100 %
  4. MultiControl Modular – MAXI, Double pump 2 x 100 %, Single valve 1 x 100 %
  5. MultiControl Modular – MAXI / TWIN. Double pump 2 x 100 %. Double valve 2 x 100 %

More about the MultiControl Modular

SpiroExpand MultoControl Cool

SpiroExpand MultiControl Cool

The MultiControl Cool is available in 6 configurations and 8 versions with volumes of 125 (x2), 200 (x2), 300 (x2) and 500 (2x) liters.

  • Operational pressure range: 1.0 – 5.6 bar
  • The minimum temperature at the point of connection: -10°C
  • Maximum safety temperature in the system: 110°C
  • The maximum temperature at the point of connection: 70°C
  • Maximum operating pressure (PN): 10 bar
  • Stainless steel containers with volumes between 125 -1000 litre
  • Corrosion-resistant materials used
  • Refill option can be added

More about the MultiControl COOL

SpiroExpand TopControl Modular

The TopControl Modular is an expansion- and pressure maintenance unit in modular design for combination with the pressureless EG expansion vessels (0,5 bar safety valve).

  • Maximum operating pressure (PN): 23,5 bar
  • The TopControl is ready to be integrated in an on-site process control.
  • The connections for integrating into the system (expansion pipe, make-up) are foreseen at both sides of the device.
  • The self supporting construction and the housing a minimal sound transmission is ensured.
SpiroExpand TopControl

Our TopControl Modular comes in 5 series with the following configurations:

  1. TopControl Modular – SOLO, Single pump 1 x 100 %, Single valve 1 x 100 %
  2. TopControl Modular – DUO, Double pump 2 x 50 %, Single valve 1 x 100 %
  3. TopControl Modular – DUO / TWIN, Double pump 2 x 50 %, Double valve 2 x 100 %
  4. TopControl Modular – MAXI, Double pump 2 x 100 %, Single valve 1 x 100 %
  5. TopControl Modular – MAXI / TWIN, Double pump 2 x 100 %, Double valve 2 x 100 %

Our TopControl Modular assortment

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.

SpiroExpand Configuration Software

Customize your pressurization set-up to maximize the performance of your heating or cooling system. Whether you are designing, dimensioning or planning as part of an initial consultation, this tool will help you, just enter the key basic parameters and you’ll be presented with various solutions in a matter of minutes. The preferred solution can be either downloaded or sent via email.

Start the SpiroExpand selection tool

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 pressurization systems’.

The degassing function available with many pressurization 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

Our full range of product solutions

Our experts have developed a whole range of high-quality products to ensure that your heating & cooling system works as efficiëntly as possible. Saving costs and provide maximum comfort for you.

Download our product catalogue