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1960 Introduced a range of self-acting pressure controls for the first time.
1961 Specialists in industrial heat control, producing "Spirax" steam traps, "Sarco" temperature controllers and "Ogden" automatic pumps. 350 employees. 
1963 Acquired Drayton Controls, a control valve and instrumentation business.
1982 Re-registered as a public company Spirax-Sarco.
1982 Turnover was over £43 million; 2,250 staff employed. Specialists in fluid control equipment. In twelve years grew from 8 overseas subsidiaries to 25.
1990 The Company diversified into pump manufacturing when it bought Watson-Marlow
Subsequently expanded the pump range by purchasing:
2014 Spirax-Sarco Engineering plc. Revenue £678m. 70 operating units in 41 countries. Divisions are Spirax Sarco for steam specialties and Watson‑Marlow for niche peristaltic pumps and associated fluid path technologies. Eploy 4,800 persons.