SANHUA Automotive offers a wide array of products, with an emphasis on thermal management systems and new-energy vehicle HVAC systems. Our complete line of high-quality thermal management products gives us the opportunity to design solutions to our customers’ specific needs while maintaining a competitive price.

Thermal Bypass Valve

  • High reliability with high volume mass production
  • Customized temperature setting
  • Flexible plumbing connection interfaces available
  • Light weight design


The thermal bypass valve is used in transmission cooling & heating systems.  It regulates oil flow and flow direction in order to self-control the operating temperature of the transmission.  OEMs use the TBV to retain oil in the transmission in cold weather, thereby heating the oil quickly and reducing internal friction. This feature reduces fuel consumption significantly in cold weather. In hot weather the valve allows oil to flow to the vehicle auxiliary oil cooler for maximum cooling performance.


Medium Oil
Environmental temperature -40 - 120℃
STO temperature 50 - 100℃
STO point tolerance ±3℃
Reaction time 45s
Internal leakage 0.3L/min
External tightness Water check @ 1034 kPa air