The LAFON DN40 Anti-Syphon Valve is a critical component for any above-ground fuel storage system, offering pressure regulation and siphon protection to prevent accidental tank drainage and site contamination. This industrial-grade valve is specifically designed for systems using diesel, HVO (Hydrotreated Vegetable Oil), GTL (Gas-to-Liquid), and unleaded petrol including E5 and E10 blends.
Constructed from high-resistance aluminium with a copper-aluminium check valve and hydrocarbon-resistant seals, the LAFON valve ensures dependable performance in demanding fuel-handling environments. The triangular flanged 1½” BSP female ports allow quick horizontal installation and maintenance without removing pipework.
Featuring an integrated mesh filter to block impurities and an adjustable screw to tune flow behaviour, this valve helps maintain system efficiency and safety. Its maximum flow rate of 83 litres per minute can be doubled with a second valve in parallel installation.