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History

Discover the rich history of LESER, a leading company in safety valves. From its humble beginnings in 1818 as a brass foundry to its continuous growth and innovation, LESER has upheld high reliability and quality standards. Learn about the roots and solidarity of LESER and the LESER family.

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History

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  1. History A story of a family-owned business: since 1818 until now History | LESER GmbH & Co. KG | 16.03.2011 | Rev. 02

  2. Objectives Objectives of this PresentationKnowledge to learn • The aim of this presentation is to highlight theroots and solidarity of LESER and the LESER family. • We also give an overview of the old tradition of LESERand it’s continuous growth till now. • LESER is a leading company with high reliability and quality standards.

  3. Safety Valve History The History of Safety Valves • 1681 Denis Papin develops the first safety valve for a degister • 1856 John Ramsbottom invented a spring loaded safety valve • 1866 The „Dampfkessel-Revisions-Verein“ (steam boiler inspection society) and later TÜV was founded in Germany • 1880 Foundation of the American Society of Mechanical Engineers (ASME) • 1919 Foundation of the National Board (NB) of Boiler and Pressure Vessel Inspectors • 1924ASME Code for unfired pressure vessels • 1997Pressure Equipment Directive PED 97/23 was published in order to harmonize the different European standards for pressure vessels 1681 1856 1866 1919

  4. LESER History The History of LESER • 1818 Founded as a brass foundry in Hamburg-Neustadt • 1833 First site with machining tools at the same location • 1884 Complete range of steam fittings, including safety valves • 1914 Expansion with purchase of the Wendenstrasse site • 1943 Relocation of the production in Hohenwestedt and destruction of the plant in Hamburg • 1948 Reconstruction of Wendenstrasse • 1957 First test lab for safety valves • 1959 First type test approval 1913 1943 1948 1957

  5. LESER History The History of LESER • 1970 Specialisation in Safety Valves • 1980 Market leader in Germany & Europe • 1990 First ASME approval • 2001 Launch of API Series • 2008 Highest investment (8,2 Mio. € / 11,5 Mill. US $*) in company history • 2010 Launching of the Pilot Operated Safety Valve *1,00 € = 1,40 US $ 1970 2001 2006 2007 2010

  6. Product History Product History API Type 444 Type 441 Full Noozle Type 441 XXL Type 441 ANSI Type 441 DIN Type 539 Type 437 Type 549 Type 459 Type 488 HyTight Type 483, 484, 485 Type 448 Type 488 Type 547 Type 447 Type 310 Type 311 Pilot

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