Expansion systems

Expansion systems

Expansion units with compressor

MKU & MKS

The entirely micro-processor driven control unit in the MKU / MKS expansion vessel has a number of parameters that can be set to any variable within a given range. Other characteristics of the M-K are the high level of reliability and sturdiness.

The M-K is adaptable to a wide range of situations and there are plenty of optional accessories which mean that it can be put to many different uses in countless systems. It requires no oil or maintenance. The MKU / MKS compressor expansion vessels store the expansion water from the system. They also hold the system pressure at the pre-set level within clearly defined limits. Water and compressed air are separated from each other by a removable high-quality butyl-rubber membrane which has a high diffusion density (low gas permeability). Produced in accordance with the Pressure Equipment Directive 2014/68/EU and the Machinery Directive 2006/42/EC.

MK

The SOTEX MK add-on vessels for the simply enlargement of the expansion capacity are not equipped with a controller or compressor. The vessel to be connected must be similar to the basic vessel and connected on the air side by means of a pressure hose. Quick-release couplings are provided.

The MK coupling vessels take up the expansion water of the installation. Water and compressed air are separated from each other by a removable high-quality butyl-rubber membrane which has a high diffusion density (low gas permeability). Produced in accordance with the Pressure Equipment Directive 2014/68/EU and the Machinery Directive 2006/42/EC.

Expansion systems with pump

EcoFlex PLE

The SOTEX EcoFlex PLE expansion vessel is a particularly investment-friendly expansion system ideal for export projects.

The EcoFlex PLE is an expansion system equipped with a pump and an EPDM membrane. The membrane ensures that water and air are kept separate; it is mounted horizontally to the top of the vessel and it ‘drives’ continuously to the water level. The vessel has an extremely long service life because it operates in a pressureless state. Also available with special supply voltages and special dimensions.

EcoFlex PLV

The SOTEX EcoFlex PLV add-on vessels make it easy to increase the expansion volume without having to add an extra control unit directly.

However, it is possible that the pump capacity of the vessel will have to be adjusted. For more advice about the options available, please contact our sales department.

EcoFlex PLC

The SOTEX EcoFlex PLC expansion set is a combination of an PLE expansion vessel and one or more PLV add-on vessels.

Membrane expansion vessels

Flexcon

The Flexcon membrane expansion vessels are particularly suitable for use in central heating and cooling systems according to EN12828. They more than comply with the European directives, and are provided with the CE mark. The SOTEX product range offers membrane expansion vessels with a capacity of 100 to 1,000 litres, available in two pressure classes, 6 and 10 bar.

Flexcon M

The Flexcon ‘M’ with exchangeable butyl rubber membrane offers you extra-special advantages in installations with big differences between the static pressure and set pressure of the safety valve. The sophisticated design delivers high efficiency, which means that the capacity of the vessel is used to best effect.

Auxiliary expansion vessels (cooling vessels)

VSV & VB

Intermediate vessels are designed to cool down the expansion water before it enters the expansion vessel or expansion units. A control vessel is necessary if the expansion water has a temperature higher than 70°C. Available from 200 to 2,000 litres, pressure class 6 or 10 bar.

Nitrogen Expansion systems

Nitromat VP

The SOTEX nitrogen expansion system consists of a Nitromat nitrogen generator, a compressor and a nitrogen storage tank.

The Nitromat VP series are highly reliable nitrogen generators, energy efficient and deliver a purity of 99% nitrogen or more. The Nitromat VP is the standard version in the product range and comes with highly reliable components from global brands, effective compressed air treatment, oil/water separator and a Siemens PLC control. The SOTEX Nitromat VP nitrogen generators are built according to the European CE PED directive, executed according to UL/CSA directive and have an EAC CU TR certificate. The SOTEX VP nitrogen system is applied to vertical storage tanks, where the standard version can provide one tank with a nitrogen blanket (pressure in mbar).

Nitromat VP-L

This type is a more luxurious version of the type VP. The VP-L is executed with a ‘Long-Life’ kit. The compressed air treatment will be considerably upgraded; a complementary refrigeration dryer, extra compressed air filters, extra electronic condensate drain and an activated carbon adsorber. The quality of the VP-L version is thus even better, which will extend the expected service life.

Nitromat HP & HP-L

The HP and HP-L versions are the same as the VP series but work with a working pressure of 1-2 bar (optional to change) so there is a pressure holding system. These nitrogen expansion vessels are usually applied to PED approved buffer tanks, which are used as expansion vessels. For example, in systems with high medium temperatures (> 120 ⁰C) this is an ideal system compared to regular expansion vessels.

Accessories for Nitrogen Expansion systems

Supplied as standard:

Optionally included:

Sotex: Expansion systems