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In 1933, Mads Clausen founded Danfoss in his parents' farmhouse in Nordborg, Denmark. His initial products were thermostatic expansion valves, water valves, thermostats, pressure switches & filter driers. In 1952 he entered into a licensing agreement with Tecumseh Products to produce hermetic compressors. In 1956, Danfoss Compressors GmbH was established in Flensburg, Germany as a Danfoss subsidiary. The subsidiary was renamed Secop when it was acquired by German industrial holdings company Aurelius in 2010. Nidec Corp., a Japanese manufacturer of electric motors, acquired Secop in 2017. In 2019, Nidec sold Secop to ESSVP IV, a European private equity firm. Danfoss refrigerant flow controls remain part of the Danfoss Climate Solutions business segment.

Publication DKRCC.PE.000.H2.02 2017 : Retrofit and High Glide Refrigerants Technical Paper.
Publication USCO.PK.000.J1.02 2017 : Supermarket Service Parts Catalog.
Thermostatic Expansion Valves (TXVs)
Publication DKRCC.PE.000.B1.22 2015 : Thermostatic Expansion Valve vs Capillary Tube.
Publication USCO.PI.AA0.A1.22/521U0165 2010 : Type T2 Selection & Installation Guide.
Publication DKRCC.PD.AP0.A4.02/520H8299 2014 : Type TD1(E) Data Sheet.
Publication USCO.PI.AG0.A1.22/521U0164 2010 : Type TUA Selection & Installation Guide.
Publication 2008 : Danfoss Compressor Business, a History.
Danfoss Website : Danfoss Website Home Page.
Secop Website : Secop Website Home Page.