VV/VT SHED2019-01-10T14:19:23+00:00


The Evaporative Emissions Test System, Variable Volume/Variable Temperature (VV/VTS) Sealed Housing for Evaporative Determiniation (SHED), is designed for use in measuring automotive diurnal evaporative hydrocarbon (HC) emissions from non-operating test vehicles.

Evaporative Emissions Test System, VV/VT SHED is designed and constructed to confirm to the latest standards regulations and executes the test methods and procedures:

  1. U.S. EPA Evaporative Emission Regulation, 40 CFR Part 86, subpart B, 1993 & 1990 versions.
  2. California Air Resources Board’s (CARB’s) Evaporative Emission Regulations for light passenger cars, revised 20 1991 and 1996.
  3. Euro III, IV, V & VI, EEC 98/69, parts relevant to Diurnal Evaporative Emissions and Hot Soak Test.
  4. GB/T 18352.1, 1835.2

Download the VV/VT SHED Data Sheet here

  • Fully welded stainless steel construction to meet LEV testing
  • Multiple vehicle door configurations available
  • Inflatable seal system for sealing main vehicle door
  • Zero leakage butterfly valve for purge air
  • Volume compensation using impermeable bags
  • Temperature compensated flow meter for volume determination
  • Bottom discharge air handler for uniform underbody airflow
  • Standard regulation and user defined temperature profiles
  • Interface with all major HFID analyzers
  • PLC or PC based control systems available
  • Cascade PID control for enclosure temperature vs time profile runs
  • Multiple PID set for optimum temperature control throughout the temperature profile
  • Monitoring of system safeties
  • Audible and visual annunciation of alarms
  • Manual over-ride for all critical functions