Pressure expansion vessels

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3
Diaphragm expansion vessel REFLEX N-18, 18L, 4 bar / 70°C, threaded connection male thread R3/4", light grey, for heating and cooling systems, vertical, with non-replaceable semi-membrane
Reflex
1
210,74 zł/pcs
8204301
CNS088

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11,07 zł

267 pcs
Diaphragm expansion vessel REFLEX N-25, 25L, 4 bar / 70°C, threaded connection male R3/4", light grey, for heating and cooling systems, hanging, with non-replaceable semi-membrane
Reflex
1
249,05 zł/pcs
8206301
CNS094

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164 pcs
Diaphragm expansion vessel REFLEX N-12, 12L, 4 bar / 70°C, threaded connection male thread R3/4", light grey, for heating and cooling systems, vertical, with non-replaceable semi-membrane
Reflex
1
193,27 zł/pcs
8203301
CNS097

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118 pcs
Diaphragm expansion vessel REFLEX N-35, 35L, 4 bar / 70°C, threaded connection male thread R3/4", light grey, for heating and cooling systems, standing, with non-replaceable semi-membrane
Reflex
1
340,67 zł/pcs
8208401
CNS085

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74 pcs
Diaphragm expansion vessel REFLEX N-50, 50L, 6 bar / 70°C, threaded connection male thread R3/4", light grey, for heating and cooling systems, standing, with non-replaceable semi-membrane
Reflex
1
499,85 zł/pcs
8209300
CNS092

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55 pcs
Diaphragm expansion vessel REFLEX N-80, 80L, 6 bar / 70°C, threaded connection male R1", light grey, for heating and cooling systems, standing, with non-replaceable semi-membrane
Reflex
1
797,14 zł/pcs
8210200
CNS098

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48 pcs
Diaphragm expansion vessel REFLEX N-100, 100L, 6 bar / 70°C, threaded connection GZ R1", light grey, for heating and cooling systems, standing, with non-replaceable semi-membrane
Reflex
1
1 073,00 zł/pcs
8216300
CNS089

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49 pcs
Diaphragm expansion vessel REFLEX N-140, 140L, 6 bar / 70 °C, threaded connection GZ R1", light grey, for heating and cooling systems, standing, with non-replaceable semi-membrane
Reflex
1
1 283,78 zł/pcs
8211400
CNS095

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146,37 zł

30 pcs
Diaphragm expansion vessel BASEFLEX-25, 25L, 1.5/6 bar / 70°C, threaded connection G3/4" male, red RAL 3002, for heating and cooling systems, vertical mounting
Flamco
1
199,75 zł/pcs
25303
CEP185

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138 pcs
Diaphragm expansion vessel BASEFLEX-18, 18L, 1.5/6 bar / 70°C, threaded connection G3/4" male, red RAL 3002, for heating and cooling systems, vertical mounting
Flamco
1
156,81 zł/pcs
25302
CEP177

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97 pcs
Diaphragm expansion vessel REFLEX N-200, 200L, 6 bar / 70 °C, GZ R1 threaded connection, light gray, for heating and cooling systems, standing, with non-replaceable semi-membrane
Reflex
1
1 550,97 zł/pcs
8213300
HBX252

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146,37 zł

26 pcs
Diaphragm expansion vessel REFLEX N-8, 8L, 4 bar / 70°C, threaded connection GZ R3/4", light grey, for heating and cooling systems, vertical, with non-replaceable semi-membrane.
Reflex
1
179,09 zł/pcs
8202501
CNS091

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46 pcs
Diaphragm expansion vessel CONTRAFLEX-18, 18L, 1.5/3 bar / 70°C, threaded connection R3/4", red RAL 3002, for heating and cooling systems, hanging mounting
Flamco
1
174,40 zł/pcs
26173
CDH830

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86 pcs
Diaphragm expansion vessel CONTRAFLEX-25, 25L, 1.5/3 bar / 70°C, threaded connection R3/4", red RAL 3002, for heating and cooling systems, hanging mounting
Flamco
1
220,76 zł/pcs
26243
CDH836

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52 pcs
Diaphragm expansion vessel BASEFLEX-12, 12L, 1.5/6 bar / 70°C, threaded connection G3/4" male, red RAL 3002, for heating and cooling systems, vertical mounting
Flamco
1
148,67 zł/pcs
25301
CEP180

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42 pcs
Diaphragm expansion vessel REFLEX N-300, 300L, 6 bar / 70 °C, threaded connection GZ R1", light grey, for heating and cooling systems, standing, with non-replaceable semi-membrane
Reflex
1
2 525,07 zł/pcs
8215300
HBX254

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146,37 zł

7 pcs
Diaphragm expansion vessel REFLEX N-250, 250L, 6 bar / 70°C, threaded connection male thread R1", light grey, for heating and cooling systems, standing, with non-replaceable semi-membrane
Reflex
1
2 047,41 zł/pcs
8214300
HBX253

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146,37 zł

15 pcs
Diaphragm expansion vessel CONTRAFLEX-12, 12L, 1.5/3 bar / 70°C, threaded connection R3/4", red RAL 3002, for heating and cooling systems, hanging mounting
Flamco
1
166,98 zł/pcs
26133
CDH841

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52 pcs
Diaphragm expansion vessel REFLEX N-400, 400L, 6 bar / 70°C, threaded connection male thread R1", light grey, for heating and cooling systems, standing, with non-replaceable semi-membrane
Reflex
1
3 204,03 zł/pcs
8218000
HBX255

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146,37 zł

13 pcs
Diaphragm expansion vessel BASEFLEX-50, 50L, 1.5/6 bar / 70°C, threaded connection G3/4" male, red RAL 3002, for heating and cooling systems, standing
Flamco
1
415,49 zł/pcs
25306
CNB990

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23 pcs
Diaphragm expansion vessel BASEFLEX-35, 35L, 1.5/6 bar / 70°C, threaded connection G3/4" male, red RAL 3002, for heating and cooling systems, standing
Flamco
1
254,17 zł/pcs
25305
CEP181

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20 pcs
Diaphragm expansion vessel CONTRAFLEX-35, 35L, 1.5/3 bar / 70°C, threaded connection R3/4", red RAL 3002, for heating and cooling systems, vertical
Flamco
1
294,57 zł/pcs
26343
CDH839

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37 pcs
Diaphragm expansion vessel CONTRAFLEX-8, 8L, 1.5/3 bar / 70°C, threaded connection R3/4", red RAL 3002, for heating and cooling systems, vertical mounting
Flamco
1
151,79 zł/pcs
26073
CDH835

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19 pcs
Diaphragm expansion vessel REFLEX N-500, 500L, 6 bar / 70°C, threaded connection male thread R1", light grey, for heating and cooling systems, standing, with non-replaceable semi-membrane
Reflex
1
4 261,41 zł/pcs
8218300
HBX256

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146,37 zł

7 pcs
Diaphragm expansion vessel REFLEX N-800, 800L, 6 bar / 70°C, threaded connection male thread R1", light grey, for heating and cooling systems, standing, with non-replaceable semi-membrane
Reflex
1
7 430,23 zł/pcs
8218500
HBX289

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11 pcs
Diaphragm expansion vessel REFLEX N-600, 600L, 6 bar / 70°C, threaded connection male R1", dark grey, for heating and cooling systems, standing, with non-replaceable semi-membrane
Reflex
1
5 675,76 zł/pcs
8218400
HBX257

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2 pcs
REFLEX C-12 flat diaphragm expansion vessel, 12L, 3 bar / 70 st., G 1/2" threaded connection, grey, for heating and cooling systems, wall-mounted, with non-replaceable membrane
Reflex
1
449,47 zł/pcs
8280100
HBX246

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6 pcs
Diaphragm expansion vessel CONTRAFLEX-150, 150L, 3.0/6 bar / 70 pcs., G3/4"M threaded connection, red color RAL 3002, for heating and cooling systems, vertical
Flamco
1
800,69 zł/pcs
Oh! NEW
17119
CDH840

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146,37 zł

1 pcs
Flat, round pressure expansion vessel with integrated fastening bracket, type REFLEX C 50, pressure 3 bar / 120 ° C gray
Reflex
1
704,96 zł/pcs
8280500
HBX325

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3 pcs
Diaphragm expansion vessel REFLEX G-100, 100L, 6 bar / 70°C, threaded connection G1", light grey, for heating and cooling systems, standing, with replaceable membrane
Reflex
1
3 241,81 zł/pcs
8519000
HBX312

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3 pcs
Diaphragm expansion vessel REFLEX G-600, 600L, 6 bar / 70°C, threaded connection G1", light grey, for heating and cooling systems, standing, with replaceable membrane
Reflex
1
6 892,62 zł/pcs
8522605
HBX263

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4 pcs
Diaphragm expansion vessel REFLEX G-200, 200L, 6 bar / 70°C, threaded connection G1 1/4", light grey, for heating and cooling systems, standing, with replaceable membrane
Reflex
1
3 960,64 zł/pcs
8519100
HBX258

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146,37 zł

2 pcs
Diaphragm expansion vessel REFLEX G-500, 500L, 6 bar / 70°C, threaded connection G1", light grey, for heating and cooling systems, standing, with replaceable membrane
Reflex
1
6 167,69 zł/pcs
8521705
HBX261

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4 pcs
Diaphragm expansion vessel REFLEX G-400, 400L, 6 bar / 70°C, threaded connection G1", light grey, for heating and cooling systems, standing, with replaceable membrane
Reflex
1
5 590,24 zł/pcs
8521605
HBX260

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2 pcs
Diaphragm expansion vessel REFIX DE-18, 18L, 10 bar / 70°C, threaded connection G3/4", blue, for DHW, fire protection, underfloor heating, geothermal, wall-mounted, with non-replaceable membrane
Reflex
1
293,20 zł/pcs
7303000
HBX234

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11,07 zł

379 pcs
Diaphragm expansion vessel REFIX DE-12, 12L, 10 bar / 70°C, threaded connection G3/4", blue, for DHW, fire protection, underfloor heating, geothermal, hanging, with non-replaceable membrane
Reflex
1
242,42 zł/pcs
7302000
HBX233

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11,07 zł

235 pcs
Diaphragm expansion vessel REFIX DE-25, 25L, 10 bar / 70°C, threaded connection G3/4", blue, for DHW, fire protection, underfloor heating, geothermal, hanging, with non-replaceable membrane
Reflex
1
314,86 zł/pcs
7304000
HBX235

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211 pcs
Diaphragm expansion vessel REFIX DE-8, 8L, 10 bar / 70°C, threaded connection G3/4", blue, for DHW, fire protection, underfloor heating, geothermal, wall-mounted, with non-replaceable membrane
Reflex
1
228,26 zł/pcs
7301000
HBX232

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181 pcs
Diaphragm expansion vessel FLOFIX-12, 12L, 4.0/10 bar / 110°C, threaded connection G3/4" male, white RAL 9010, for DHW installations, vertical mounting.
Flamco
1
196,70 zł/pcs
25291
CEP182

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11,07 zł

146 pcs
Diaphragm expansion vessel FLOFIX-18, 18L, 4.0/10 bar / 110°C, threaded connection G3/4" male, white RAL 9010, for DHW installations, vertical mounting
Flamco
1
251,58 zł/pcs
25292
CEP178

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11,07 zł

69 pcs
Diaphragm expansion vessel REFIX DE-33, 33L, 10 bar / 70°C, threaded connection G3/4", blue, for DHW, fire protection, underfloor heating, geothermal, wall-mounted, with non-removable membrane
Reflex
1
599,72 zł/pcs
7303900
HBX236

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36 pcs
Diaphragm expansion vessel REFIX DE-50, 50L, 10 bar / 70°C, threaded connection G1", blue, for DHW, fire protection, underfloor heating, geothermal, standing, with replaceable membrane
Reflex
1
1 135,49 zł/pcs
7306005
HGF796

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15 pcs
Diaphragm expansion vessel FLOFIX-25, 25L, 4.0/10 bar / 110°C, threaded connection G3/4" male, white RAL 9010, for DHW installations, vertical mounting
Flamco
1
252,72 zł/pcs
25293
CEP175

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11,07 zł

29 pcs
Diaphragm expansion vessel FLOFIX-8, 8L, 4.0/10 bar / 110°C, threaded connection G3/4" male, white RAL 9010, for DHW systems, vertical mounting
Flamco
1
189,54 zł/pcs
25290
CEP174

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11,07 zł

44 pcs
Diaphragm expansion vessel REFIX DE-80, 80L, 10 bar / 70°C, threaded connection G1", blue, for DHW, fire protection, underfloor heating, geothermal, standing, with replaceable membrane
Reflex
1
1 504,54 zł/pcs
7306500
DAS429

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16 pcs
Diaphragm expansion vessel REFIX DD-18, 18L, 10 bar / 70 pcs., G3/4" threaded connection, white, for domestic hot water (DHW), wall-mounted, with non-replaceable membrane, with Rp 3/4" tee
Reflex
1
340,67 zł/pcs
7307900
HBX417

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16 pcs
Diaphragm expansion vessel AIRFIX-E-12, 12L, 4.0/10 bar / 70°C, with synthetic flow distributor, threaded connection R3/4", white RAL 9010, for DHW and booster systems, hanging.
Flamco
1
239,94 zł/pcs
25241
CMY628

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11,07 zł

32 pcs
Diaphragm expansion vessel REFIX DE-100, 100L, 10 bar / 70°C, threaded connection G1", blue, for DHW, fire protection, underfloor heating, geothermal, standing, with replaceable membrane
Reflex
1
1 846,11 zł/pcs
7306600
HGL569

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7 pcs
Diaphragm expansion vessel REFIX DD-12, 12L, 10 bar / 70°C, threaded connection G3/4", white, for DHW, vertical, with non-replaceable membrane, with tee Rp 3/4".
Reflex
1
297,41 zł/pcs
7307800
HBX416

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42 pcs

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3


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.