If the outlet of an oil supply tank is more than 4 feet above the burner, what is required?

When the outlet of an oil supply tank is positioned more than 4 feet above the burner, specific safety measures are mandated due to the potential for increased pressure in the oil delivery system. This is where the requirement for an OSV (Oil Safety Valve) or PRV (Pressure Relief Valve) comes into play.

The OSV is designed to prevent excessive oil from entering the burner area, reducing the risk of serious malfunctions or spills that could occur due to high pressure. The PRV, on the other hand, serves to relieve excess pressure within the system, ensuring that the operational pressures remain within safe limits.

Having either or both of these valves is crucial for maintaining safety standards and compliance with regulations, particularly when there is a significant vertical distance between the storage tank and the burner. This requirement is meant to mitigate risks associated with gravity-fed oil systems, which can otherwise create hazardous situations if not properly equipped with these safety devices. In this context, the choice of having either an OSV or a PRV is appropriate and necessary for ensuring the safe operation of the oil delivery system.