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Anti-siphon valve, oil filter

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Valves and oil filters for safety and function
Anti-siphon valves and oil filters are important components in heating oil installations. Oil filters and heating oil de-aerators guarantee fault-free burner operation, and anti-siphon valves increase safety. They prevent possible oil leakage from the heating oil pipe or around the oil burner. They must always be installed with the maximum level of the heating oil tank above the lowest point of the suction pipe. Without this safety device, if a leak occurs here, large quantities of heating oil can escape. This is because of the siphon-effect, where the pressure difference causes the heating oil tank to be sucked empty.

The anti-siphon device is installed close to the heating oil tank, while components such as the heating oil filter or the oil de-aerator are installed just before the heating burner. The heating oil filter ensures that no foreign bodies or suspended particles can get into the burner. These could clog the oil nozzle and lead to faults. As heating oil ages, flocculation and small suspended particles can’t always be prevented. The filter insert of the heating oil filter should therefore be checked regularly and replaced if necessary. Heating oil de-aerators prevent burner faults caused by air bubbles or cas carried in the heating oil. It is often recommended to install a combination of filter and vent for oil heating systems.

Anti-siphon valve protects against oil leakages
If the maximum possible heating oil level in the oil tank is above the lowest point of the oil-bearing components of the system, this can lead to siphoning. The siphon principle means that under adverse conditions a large part of the tank contents can empty if a leak occurs in the oil line or at the burner. Anti-siphon valves can however prevent the escape of heating oil in the event of such a leakage. Both mechanical and electromagnetic valves are available. Mechanical valves such as diaphragm valves and piston valves open as a result of the negative pressure generated by the oil pump. They can be adjusted by hand. Solenoid anti-siphon valves are electrically controlled and open when the burner is started.



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