OSV

Oil Safety Valves (OSV®) valves can be used for the following applications which require slightly different installations:
– Preventing tank siphoning and oil leaks in the event of line breaks,
– Preventing excessive pressure at the inlet of the burner fuel unit, for use with a supply pump (booster pump)
Many state and local codes require a device that will automatically shut off the oil supply before it enters a building should the line between the device and the burner be broken. NFPA standards require that the pressure at the burner fuel pumps must not exceed 3 PSI. The Webster OSV satisfies both requirements when properly installed. Check local codes for any special requirements.