§ 2-57. Valves.

A. 

Readily accessible shutoff valves of approved type shall be installed in supply lines or source of supply near each burner and close to gravity and pressure supply tanks. Shutoff valves of approved type shall be installed on each side of oil strainers which are not a part of the oil burner unit, and on the discharge and suction side of oil pumps which pump directly to the burner but which are not a part of the burner unit.

B. 

Where design of the valve requires the use of a stuffing box, the stuffing box shall be of liberal size, containing supped gland designed to compress the packing against the steam, and arranged so as to facilitate removal. The use of packing affected by oil or heat is prohibited.

C. 

Where gravity feed is permitted, the oil supply line must be equipped with a quick-closing approved fusible fire valve placed near the burner.

D. 

Where tanks are located so that the top of the tank is above the level of the suction inlet of the pump supplying oil to the burner or the burner assembly, a siphon-breaking device, consisting of an antisiphon valve, a vacuum tank underwriters siphon breaker, siphon-breaking pump set or equivalent devices to prevent siphoning shall be installed.