N.Y. Comp. Codes R. & Regs. Tit. 12 §§ 14-11.10

Current through Register Vol. 46, No. 53, December 31, 2024

Section 14-11.10 - Safety valves

(a) Each miniature boiler shall be equipped with a sealed spring-loaded pop safety valve not less than one-half inch in diameter. Where there is no extraction of steam (closed system), a safety fracturing disk may be used in addition to the spring-loaded pop safety valve.

(b) Each safety valve shall be plainly marked by the manufacturer in such a way that the markings will not be obliterated in service. The markings may be stamped on the casing, or stamped or cast on a plate or plates securely fastened to the casing, and shall comply with sections 14-9.4 to 14-9.15, inclusive, of this Part.

(c) The safety valve or valves shall be connected to the boiler independently of any other steam connection, without any unnecessary intervening pipe or fitting. Such intervening pipe or fitting, if unavoidable, shall be not longer than the corresponding face-to-face dimension of a tee fitting of the same diameter, and the minimum opening therethrough shall be at least equal to the area of the valve inlet. No valve of any description shall be placed between the safety valve or valves and the boiler, nor on the discharge pipe from the safety valve to the atmosphere.

(d) To insure the safety valve being free, each valve shall have a substantial lifting device by which the valve disk may be lifted from its seat when there is at least 75 percent of full working pressure in the boiler. All safety valves shall be mounted with their spindles vertical in an upright position and freely accessible.

N.Y. Comp. Codes R. & Regs. Tit. 12 §§ 14-11.10