Vapor Retention Valve for Fuel Ventilation Systems

Made in JAPAN

Designed for use in the ventilation piping of underground fuel storage tanks, this advanced vapor retention valve minimizes fuel vapor loss caused by evaporation. It is especially effective under warm weather conditions and high wind scenarios, where pressure differentials can accelerate vapor escape. By preventing excessive venting, the valve helps maintain fuel volume, improves environmental compliance, and reduces economic loss making it an essential component for modern gas station vapor management systems.

Three pipes with white caps labeled 'ECO'

  • No maintenance needed

  • Easy one time installation

  • Guaranteed long service life

  • Prevents excessive Vapor loss

  • Prevents pressure build up on UGT and pipeline

  • Weather proof

  • Market leader in Japan with 83% of fuel refilling station installed

  • Ideal for residential and highly commercial area with neighboring establishments

  • Reduces oil vapor within the vicinity during normal operations

A white SKK ECO Cap with a blue label and embossed branding, designed for outdoor use.
Diagram of a component with labels pointing to an exhaust valve, safety valve, and intake valve, with text in Japanese and English.

  • The ECOvent (exhaust valve) automatically activates when the tank pressure rises due to added fuel or vapor, releasing excess pressure to equalize with atmospheric pressure.

  • The intake valve automatically opens when the pressure inside the tank drops below atmospheric pressure due to fuel dispenser operation, allowing outside air to enter and equalize the pressure.

Comparison of two types, one labeled ECOvent and the other conventional, shown in transparent cylinders with liquid at the bottom. The filters are positioned next to each other with a start line marked on the cylinders, indicating the beginning of a 100-day test period.
Educational infographic about SKK ECO exhaust valve system, showing a white exhaust valve with blue ECO label, comparison of evaporation of gasoline intake using ECOvent and conventional type, and schematic of the valve's operation with labeled safety and intake valves.