Fill Line Diffuser
The fill line diffuser reduces aeration, turbulence and disturbance of tank debris, it calms deliveries and prevents vapour growth.
 Diffuser Datasheet
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Air Transfer Valve
The air transfer valve prevents the slug of trapped air in delivery fill lines aerating and disturbing the fuel in the tank, leading to less vapour growth and turbulence in the tank.
Air Transfer valve datasheet
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Vapour Retainer
The vapour retainer holds vapour in the tank ulluage until the pressure reaches 30mBar, after which it will open and allow vapour to go back to the road tanker. It does not effect the site pressure vacuum vent valve which is still set to 35mBar.
Vapour retainer datasheet
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Pressure Vacuum Vent
Pressure vacuum vents are required in Stage 1B systems to retain up to 35mBar of vapour pressure in the tanks. This requirement remains relevant when used in a Stage 2 vapour recovery system
Pressure vacuum vent valve datasheet
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