A fuel tank isolation valve (FTIV) is an evaporative emissions (EVAP) system component that isolates the fuel tank from the vapor management system during specific operating and diagnostic conditions. This controlled isolation helps manage tank pressure, prevent unintended vapor flow, and enable accurate leak detection to support emissions compliance.
Also known as fuel isolation valves or tank shutoff valves, FTIVs play a critical role in system performance and safety. Proper operation ensures consistent EVAP system behavior across varying conditions while supporting compliance with global emissions standards.
Eaton fuel tank isolation valves are engineered for reliable sealing performance and long-term durability across modern vehicle architectures, fuel types, and operating environments.
OEMs face increasing challenges related to fuel tank isolation and evaporative emissions control, including:
These challenges require precise tank isolation, repeatable sealing performance, and predictable pressure relief behavior across vehicle platforms.
Selection factors vary by OEM and application; Eaton supports these requirements through system‑level EVAP experience and global engineering support.
Eaton supports fuel tank isolation valve development through comprehensive engineering capabilities, including system design, application engineering, and validation support. Experience across global vehicle platforms enables collaboration from concept through production.
Fuel tank isolation valves integrate with Eaton’s broader fuel emissions control solutions, including:
Each solution is designed to support compliant, durable fuel system architectures.
Explore Eaton’s full portfolio of fuel and evaporative emissions control technologies, including engineering resources and system level solutions.
This video shows how an FTIV isolates the fuel tank, manages pressure, and supports EVAP diagnostics during real operating states.
Valve State: ON
Valve State: OFF
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