Compensators for valves & pipes

Axial, lateral and rubber expansion joints for SKID process systems

Armaturenfabrik Compensators for valves & pipelines Axial, lateral and rubber compensators for SKID process plants

Compensators are indispensable components in pipeline construction. They compensate for temperature fluctuations, pressure changes and movements, reduce vibrations and protect your systems from mechanical loads.
Our compensators are designed for use in steam systems, the chemical and process industries, water and wastewater technology and plant engineering.

Our recommendation for compensators

Comparison table of compensators

FeatureType 50Type 222Type 208Type 212Type 206Type 210
MaterialRubber
(EPDM, CR, PTFE optional)
Stainless steel
1.4541
Stainless steel
1.4541
Stainless steel
1.4541
Stainless steel
1.4541
Stainless steel 1.4541
Movementsaxial, lateral, angularlateralaxialaxial, lateral, angularaxialaxial, lateral, angular
Nominal pressurePN 10 /
PN 16
PN 10 –
PN 25
PN 10 –
PN 16
PN 16 /
PN 25
PN 16PN 10 / PN 40
Nominal sizeDN 20 –
DN 1000
DN 50 –
DN 500
DN 15 –
DN 250
DN 50 –
DN 1000
DN 15 –
DN 50
DN 50 –
DN 1200
Temperature-40 °C to
+130 °C
up to 120°Cup to 120°Cup to 120°Cup to 120°Cup to 120°C
Special featureHighly elastic, noise damping, large variety of mediaLarge lateral movements, tension rod tensionCompact
solution for temperature equalization
Multi-layer bellows
for high pressure requirements
Vacuum-proof, simple weld-on installationFor high pressure and combined movements

Advantages of our selection of compensators

System integration

Compensators as part of SKID assemblies and complete valve stations

Special solutions

For high temperature, aggressive media and vacuum operation

Combination with insulation

For maximum energy efficiency

Fast delivery

Thanks to our own warehousing

Individual customizations

Special solutions according to customer requirements

Plant engineering expertise

Planning and production of complete piping assemblies

Valve production and plant engineering – compensators as system components

Compensators are far more than just flexible connecting elements – they are a central component of modern valve and system solutions. In complex piping systems, they take on the task of compensating for expansion, vibrations and pressure fluctuations and thus make a decisive contribution to operational safety, durability and efficiency.
Our compensators are not just standard products, but are used as integrated system components in valve production and plant engineering.

This means for you:

  • Integration in SKID assemblies – for modular and compact system solutions
  • Special versions for high temperature and aggressive media – ideal for power plants, chemical and process industries
  • Combination with heating jacket and insulation – for maximum energy efficiency and safety
  • Plant engineering expertise – we plan and manufacture complete valve stations, pump and compressor systems as well as individual piping assemblies


With this combination, we create customized solutions that not only supply individual components, but also complete systems for your industrial requirements.

Fittings factory Fittings Ball valve Globe valve Pressure regulating valves Flow meter SKID Process plant Condensate trap Pump, compensators, backflow preventers, RPZ valves

Selecting the right expansion joint

Expansion joints absorb thermal expansion, installation offsets and vibration in pipelines and thus relieve pumps, nozzles and fixed points. Three questions are decisive for the selection: which movement occurs, which material suits the medium and how it is connected.

Bewegungsart

Axialkompensatoren absorb changes in length along the pipe axis and are the standard case for thermal expansion. Lateralkompensatoren such as the type 222 absorb lateral movements only; they are braced by welded-on tie rods so that the internal pressure does not force the pipeline apart – designed for operating pressures up to 25 barg, available in PN 6, PN 10, PN 16 and PN 25. Gummikompensatoren absorb movements in several directions and at the same time provide vibration and noise decoupling: the flat-corrugated type 50 reduces up to 70 % of the incoming energy and is available in DN 20 to DN 1000, as standard in PN 10.

Einlagig or mehrlagig

The corrugated bellows of our metal expansion joints is made of Edelstahl 1.4541. Single-ply bellows (type 206, type 208) are the vacuum-tight standard version, multi-ply bellows (type 210, type 212) are designed for higher pressure requirements and additionally absorb lateral and angular movements. The permissible operating data are, for the type 208, DN 15 to DN 150 at 16 barg and DN 200 to DN 250 at 10 barg, and for the type 206 DN 15 to DN 50 at 16 barg.

Anschluss

Zur Wahl stehen Weld ends in carbon steel, bevelled ready for installation – on the type 210 from a wall thickness of 3.5 mm – as well as drehbare Losflansche, which make aligning the bolt patterns easier. On the rubber expansion joint type 50 the flanges are rotatable on both sides and in electro-galvanised steel; the moulded sealing bead seals by itself, and additional seals are not required.

Vakuumbetrieb

On the rubber expansion joint type 50 the vacuum resistance depends on the nominal size: DN 20 to DN 50 are vacuum-tight, DN 65 to DN 250 withstand down to -200 mbar, and from DN 300 a vacuum support spiral is required – with it all nominal sizes up to DN 1000 are vacuum-tight. The metal expansion joints type 206 and type 208 are vacuum-tight in the standard version.

Optionen and Einsatzbereiche

For abrasive or flow-critical media we supply metal expansion joints with Innenleitrohr (type 223), for mechanical protection with an external protection tube, and for greater face-to-face lengths with a welded-in Zwischenrohr. Typical applications are steam plants, water and wastewater technology, chemical and process plants, building services and plant engineering as well as engine and shipbuilding, solar and wind energy plants.

Note on installation: The rubber bellows must not be painted and, at medium temperatures above 50 °C, must not be insulated.

FAQ – Frequently asked questions about compensators

What movements can the compensators absorb?

Depending on type: axial, lateral and angular.

Yes, we manufacture individual lengths and diameters on request.

Design according to EJMA, flanges according to DIN EN 1092-1.

Type 206 and type 208 are vacuum-proof, other types on request.

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