Method and apparatus for vacuum testing glass bulbs for sprinkle

Details Method and apparatus for vacuum testing glass bulbs for sprinkle Method and apparatus for vacuum testing glass bulbs for sprinkle

1987-10-21

1989-05-23

Williams, Hezron E.

Measuring and testing

With fluid pressure

Leakage

73 407, G01M 304

Patent

active

048318701

ABSTRACT:
A method of testing the integrity of fusible glass bulbs of the type used as actuators in automatic sprinkler fire protection systems includes the steps of placing the bulb in a vacuum chamber, evacuating the chamber to a predetermined vacuum level at which the fluid within the bulb would vaporize, maintaining the predetermined vacuum level for a set period and then releasing the vacuum within the chamber. The bulb is removed from the chamber and visually inspected to determine if there has been a loss of fluid. The apparatus includes the vacuum chamber, a vacuum pump and a control system for connecting the pump to the chamber, maintaining the vacuum level within the chamber at a predetermined level and then releasing the vacuum.

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patent: 4593554 (1986-06-01), Aarts
Viking Technical Data, "Microfast Sprinkler Extended Coverage Horizontal Sidewall", Sep., 1986.

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