Piston type anti-siphon valve KAV Sealed system for safe fuel oil pipes. Option: Pressure gauge for indicating the KAV opening pressure Your benefits Piston instead of diaphragm – for maximum safety even in case of pollution, ice or system overpressure Height difference continuously adjustable from 1 m to 4 m Adjustment value corresponds to the safe height (reduced line resistance) Also for outdoor use (manhole) Sealed system for error-free operation Pressure gauge, pressure compensator, tester can be connected Application For oil carrying pipes in oil fired systems as per DIN 4755 where a pipe section is below the maximum tank level. KAV keeps fuel oil from being siphoned out of the tank in the case of leaks in the suction line. Suitable for the following media: fuel oil (DIN 51603-1) and diesel fuel (EN 590) as well as biofuel (EN 14213) and biodiesel (EN 14214) with up to 100 % FAME.

Description Vacuum-controlled shut-off system with a completely new function principle. KAV is closed when the burner pump is not in operation. When the burner pump starts, a vacuum is generated in the suction line. This opens the KAV and fuel oil is pumped from the tank. If the suction line has a leak or if the burner pump stops, KAV closes and the suction line between the tank and the burner pump is shut off. KAV features a pressure relief mechanism, i.e. if the fuel oil contained in the suction line heats up and therefore expands, KAV opens. The fuel oil can flow back into the tank (provided...