[3] It started to manufacture steam traps in United Kingdom under the Spirax brand name in 1932 and was first listed on the London Stock Exchange as Spirax-Sarco Engineering in 1959.

[12] It completed a new facility in Shanghai, China in June 2010: the plant, designed as Spirax's regional headquarters, combines a factory, warehouse, and offices.

[13] In 2011, the Minister for UK Trade & Investment, Lord Green, opened the new Spirax Sarco facility in Saint Petersburg, Russia[14] and in May 2012, the Deputy Prime Minister, Nick Clegg visited Spirax Sarco’s manufacturing facility in Cheltenham, Gloucestershire.

[16] Then in November 2012, the company bought Termodinámica, a distributor based in Santiago de Chile[17] and in February 2019, it bought Thermocoax, a US based business involved in the manufacture and supply of mineral insulated cable.

[18] In February 2024, the company announced its intention to rebrand as Spirax Group, subject to shareholder approval.