About us

We are the French division of Senior PLC group specialized in flexible solution & metallic bellows since 1928.


Innovation & cutting edge technologies have been in Senior Calorstat’s DNA since 1928. Back in time, we developed the first wax thermostatic elements for an emerging modern automotive industry. We are now developing the solutions for tomorrow Zero Emission flights.

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Sustainability: Environmental, Social and Governance (ESG) Disclosure

In Senior, we drive our operation under ESG disclosure, and we believe that by achieving levels of HSE performance we can all be proud and earn the confidence and respect of our customers, shareholders and the communities we work in.

Our culture is one of empowerment, through our autonomous and collaborative business structure, underpinned by six core values – safety, integrity, customer focus, respect and trust, accountability and excellence. Code of Conduct, HSE actions plans including Zero Harm and Carbone emission reduction are actively deployed within Senior Calorstat.

Senior PLC

Calorstat are a Senior PLC group business. Senior is an international, market-leading, engineering solutions provider with 26 operating businesses in 12 countries.

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Many of our products are used in aerospace & space applications. Our quality system and our certifications allows us to provide solutions for Nuclear & O&G applications. But we also deliver solutions for pump, vacuum and cryogenic industries.

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We develop flexible solutions and metallic bellows. Our products are recognized to fulfil critical accuracy requirements and to last through the time even in harsh environments. We also developed other solutions involving precision mechanical assemblies such as bipolar plate for hydrogen applications.

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Our fields of operation request us a high level of accreditation. We are AS/EN 9100, ISO 9001 & ISO 14001 certified.
We also own the Nadcap certification for the Welding and the NDT Process and we aim to validate other Nadcap certifications soon.

Beyond our standard accreditations we have also been certified by customers such as Airbus, Safran, Rolls Royce, Ariane Group or Honeywell for demanding programs.
Please contact us to get our Quality and Environmental certificates.

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Our online brochure provide you with the same information as our printed brochure, but is quicker to access and much more environmentally friendly.

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