Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 134,018 pages of information and 213,060 images on early companies, their products and the people who designed and built them.
of Wolverhampton and of Cwmbran, Newport.
1928 P. K. Saunders invented the diaphragm valve.
1933 He founded the Saunders Valve Co.
1940 Advert for diaphragm valves.
1945 Advert for valves.
1947 Private company.
1948 Company made public.
1961 Manufacturers of diaphragms, valves, centrifugal pumps and fuel systems for aircraft. 1,800 employees.
1982 The Hereford factory closed down. Saunders brought assembly of its ball and butterfly valves, until now made at Hereford, to Cwmbran where its diaphragm valves were manufactured. The new firm Sheridan Engineering was started up by former general manager at Hereford, Val Sheridan who wanted to supply Cwmbran with machined components - particularly plugs for ball valves and valve actuator parts.
Present day major manufacturing facilities in Cwmbran (U.K.), Satara (India), Conroe (US, Texas) and Cincinnati (US, Ohio)