VALVE FOR CONTROLLING THE FUEL VAPOR PRESSURE IN A TANK SYSTEM

摘要

A fuel vapor pressure control valve (20) comprising a housing (22) fitted with a first port (26) connectable to a fuel tank (12) and a second port (36) connectable to a fuel vapor recovery device (16), a valve assembly (20) for admitting vapor flow in a first direction from the first port to said second port when pressure within the tank rises to a first threshold, or for admitting vapor flow in a second, opposite direction when pressure within the tank drops bellow the pressure at the fuel vapor recovery device.