Fuel & Fluid Systems
Evaporative Emissions & Permeation Testing
SHED-based evaporative emissions and permeation testing to CARB and EPA specifications, from short isothermal runs to 72-hour diurnals.
01 · UNDERSTAND THE SERVICE
Overview
Sterling Performance specializes in fuel system evaporative emissions testing using Sealed Housing for Evaporative Emission Determination (SHED) methods. We perform a wide variety of tests, from short isothermal SHED evaluations to 72-hour diurnal procedures. All SHED tests are automated and carefully controlled to maintain conformity to regulated temperature profiles.
Our equipment accommodates fuel tanks, engines, and complete fuel system evaluations, as well as fill necks, fill caps, canisters, and tank dress components — up to full-size vehicle bucks. For permeation, components tested individually give highly accurate results per piece, so you can identify exactly which parts were out of specification, if any.
Sterling has earned recognition from the Environmental Protection Agency for evaporative emissions testing based on the quality, reliability, and repeatability of our data.
02 · CONFIRM THE FIT
Evaporative Emissions & Permeation Testing Capabilities
- Professional, concise, accurate test reports
- Isolated permeation testing areas to keep your parts and tests private
- Speciation samples collected and available upon request
- Testing to CARB & EPA specifications
- Multiple SHED volumes to evaluate components or complete systems
- Custom SHED design & build
- Humidity and temperature controlled lab
- Scientific analysis with flame ionization detectors (FID) and mass spectrometer
- Carbon canister testing
- Helium leak testing
- Gasoline & alternative fuels
03 · METHODS & CONDITIONS
Testing Methods & Conditions
- 01SHED testing from short isothermal evaluations to 72-hour diurnals
- 02Automated, controlled regulated temperature profiles
- 03Custom temperature and pressure schedules
- 04Multiple SHED volumes — components to complete systems and vehicle bucks
- 05Per-piece permeation for part-level accuracy
- 06Analysis via Flame Ionization Detectors (FID) and mass spectrometer
04 · REAL-WORLD FIT
Typical Applications & Assemblies
- Fuel system components and complete systems
- Gasoline and alternative fuel programs
Reporting & Compliance Data
Sterling delivers professional, concise, and accurate test reports backed by state-of-the-art data acquisition. Our reports are detailed enough to be submitted as engineering and government compliance backup data — so you get results you can act on and document.
ANSWERS FOR ENGINEERS
Frequently Asked Questions
What SHED tests can Sterling run?
Everything from short isothermal SHED evaluations to full 72-hour diurnal procedures, on components up to full-size vehicle bucks.
How is permeation measured accurately?
Components are tested individually for highly accurate per-piece results, so you can identify exactly which parts, if any, were out of specification.
What analysis equipment do you use?
Flame Ionization Detectors (FID) and a mass spectrometer, in a humidity- and temperature-controlled lab.
Evaporative Emissions & Permeation Testing inquiry
Ready to define the scope?
Share the part or system, requirement, operating conditions, and desired outcome. Sterling's team will use that context to begin reviewing the appropriate testing approach.