Overfill prevention valve – Model 442 B



Overfill prevention valves are disigned to prevent the overfill of liquid (fuel) in a storage tank during loading operation ensuring the positive shut-off of product delivery.

The valve can be installed either on underground (UST) or aboveground (AST) storage tank and in fact is designed for working correctly until 8 bar of loading pressure.

Ridart overfill prevention valves are compatible with all commonly used fuels.


• Gravity or pumped filling (factory tested)
• Two stage positive shut-off (factory tested)
• Fast loading operation 1100 lt/min (factory tested)
• Fast drain hose emptying (less than 30 sec/mt.) (factory tested)
• Remote or direct filling
• No need to dismantle the manhole
• No risk of fire or fuel leaking
• Easy installation with drop and riser pipe (delivered on request)
• Accepts all hydrocarbons


VAPOUR TIGHT VERSION of the valve is available on request.

See HERE other types of all available Ridart overfill prevention valves.

Download datasheet in *.pdf

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Body 3" Aluminium
Type of filling Gravity or pumped
Float Polyurethane
Working pressure 4-8 bar
Gasket Viton
Filling capacity 60 l/min-1100 l/min
Products Diesel, gasoline
Thread BSP ISO 228-1