The Risbridger Anti-Syphon Valve meets the requirements of standard and high-flow fuel
dispensers connected to above ground storage tanks with 50mm (2 inch) pipework.
Providing anti-syphon protection, the valve is capable of flow rates of up to 180 litres per
minute. The diaphragm servo assisted operating method allows high flow and low vacuum
pressure loading of the dispenser pump – unlike spring resistance type designs.
Hydraulic valve damper and progressive flow opening minimise ‘hunting’ flow modulation
problems over a wide flow and head pressure range.