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Technical Specifications Part Type Double Check Valve (Air Brake System) Part Number (SAP) SAP-KN31000 Port Size 3 ports - 1/4" NPT Max. Operating Pressure 150 PSI Material Brass body with internal check mechanism Key Features Prevents backflow from two air sources, compact design, direct OEM replacement Cross References Brand Part Number SAP SAP-KN31000 Haldex KN31000 Fortpro / Prima F224719, ATV-KN31000 Automann 170.KN31000 World American WA-KN31000 Bendix / Aftermarket SC-1 style equivalents Equipment / Vehicle Applications Make Model Model Years Notes FREIGHTLINER Cascadia (113/125) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 • Air brake system double check valve Columbia (CL112/120) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 • Air brake check valve Coronado (CC122/132) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 • Air brake system Classic / FLD Series 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 • Air brake double check valve Century Class / Argosy 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 • Air brake system KENWORTH T680 / T880 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 • Air brake double check valve T800 / T600 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 • Air brake system W900 / W900B 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 • Air brake double check valve K100 / K500 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 • Air brake system PETERBILT 389 / 388 / 387 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 • Air brake double check valve 579 / 567 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 • Air brake system 379 / 378 / 377 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 • Air brake double check valve
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