A valve (90,500,600,700,800,900,1000) for dispensing a fire extinguishing agent from a container, the valve (90,500,600,700,800,900,1000) comprising: a housing (100,610,710,810,910) including an ingress aperture (124,512b,612b,712b,812b,912,1012b) and an egress aperture (144,514b,614b,714b,814b,914b,1014b), the housing (100,610,710,810,910) defines a cavity extending along a longitudinal axis between the ingress aperture (124,512b,612b,712b,812b,912,1012b) and the egress aperture (144,514b,614b,714b,814b,914b,1014b); a rupturable disk (210,522,622,722,822,922,1022) disposed in the cavity to control a flow of the fire extinguishing agent from the ingress aperture (124,512b,612b,712b,812b,912,1012b) to the egress aperture (144,514b,614b,714b,814b,914b,1014b), the rupturable disk (210,522,622,722,822,922,1022) having a line of weakness at least partially disposed around the longitudinal axis, the rupturable disk (210,522,622,722,822,922,1022) having a burst rating greater than a maximum pressure of the fire extinguishing agent in the container, an annular spool (270,527,627,727,827,1027) defining a flow-through aperture along the longitudinal axis, the annular spool (270,527,627,727,827,1027) having an axial face engaging the rupturable disk (210,522,622,722,822,922,1022) in a latched position of the annular spool (270,527,627,727,827,1027) along the longitudinal axis, and an actuator (300,530,630,730,830,930,1030) operably coupled to the annular spool (270,527,627,727,827,1027), characterized in that the annular spool (270,527,627,727,827,1027) supports the rupturable disk (210,522,622,722,822,922,1022) and conceals the line of weakness from the ingress aperture (124,512b,612b,712b,812b,912,1012b) in the latched position, and the annular spool (270,527,627,727,827,1027) responds to the actuator (300,530,630,730,830,930,1030) to move along the longitudinal axis to a fired position that exposes the line of weakness to allow the flow of fire extinguishing agent through the flow-through aperture of the annular spool (270,527,627,727,827,1027) along the longitudinal axis and from the egress aperture (144,514b,614b,714b,814b,914b,1014b) of the housing (100,610,710,810,910). a housing (100,610,710,810,910) including an ingress aperture (124,512b,612b,712b,812b,912,1012b) and an egress aperture (144,514b,614b,714b,814b,914b,1014b), the housing (100,610,710,810,910) defines a cavity extending along a longitudinal axis between the ingress aperture (124,512b,612b,712b,812b,912,1012b) and the egress aperture (144,514b,614b,714b,814b,914b,1014b); a rupturable disk (210,522,622,722,822,922,1022) disposed in the cavity to control a flow of the fire extinguishing agent from the ingress aperture (124,512b,612b,712b,812b,912,1012b) to the egress aperture (144,514b,614b,714b,814b,914b,1014b), the rupturable disk (210,522,622,722,822,922,1022) having a line of weakness at least partially disposed around the longitudinal axis, the rupturable disk (210,522,622,722,822,922,1022) having a burst rating greater than a maximum pressure of the fire extinguishing agent in the container, an annular spool (270,527,627,727,827,1027) defining a flow-through aperture along the longitudinal axis, the annular spool (270,527,627,727,827,1027) having an axial face engaging the rupturable disk (210,522,622,722,822,922,1022) in a latched position of the annular spool (270,527,627,727,827,1027) along the longitudinal axis, and an actuator (300,530,630,730,830,930,1030) operably coupled to the annular spool (270,527,627,727,827,1027), characterized in that the annular spool (270,527,627,727,827,1027) supports the rupturable disk (210,522,622,722,822,922,1022) and conceals the line of weakness from the ingress aperture (124,512b,612b,712b,812b,912,1012b) in the latched position, and the annular spool (270,527,627,727,827,1027) responds to the actuator (300,530,630,730,830,930,1030) to move along the longitudinal axis to a fired position that exposes the line of weakness to allow the flow of fire extinguishing agent through the flow-through aperture of the annular spool (270,527,627,727,827,1027) along the longitudinal axis and from the egress aperture (144,514b,614b,714b,814b,914b,1014b) of the housing (100,610,710,810,910).