Patent ID: 8667985

Claim:
An integrated pressure relief valve and vent assembly comprising: a tank vent including: (i) a vent body including a vent inlet adapted to connect to a tank and arranged to communicate with an exhaust outlet via a fluid passageway of the vent body; (ii) an exhaust check valve connected to the vent body at or adjacent the exhaust outlet, the exhaust check valve being configured to allow flow through the fluid passageway in one direction only to atmosphere; (iii) an ambient air inlet separate from the exhaust outlet and arranged in fluid communication with the fluid passageway to permit the flow of ambient air from atmosphere into the tank via the fluid passageway and the vent inlet; (iv) a pressure relief valve connected to the vent body at the vent inlet, the pressure relief valve when closed allowing for venting air or air/hydrocarbon mixtures from the tank to the atmosphere via the fluid passageway and the exhaust check valve, the pressure relief valve when opened, on pressurisation of the tank, exhausting tank fluid from the exhaust check valve to the atmosphere via the pressure relief valve and the fluid passageway.