Fire-Safe Vent Valves Fig 661 & 641
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Cut Sheet to ValveOverview
JA Moody distributes many different Keystone valves. Such as the Keystone fire-safe vent valve that is specifically designed for use as airtight and watertight closures. A major advantage of this vent valve over any ordinary valve is that it is fire safe. Meaning that in the event of a fire or a high-temperature flow it remains structurally sound and gets the job done. Thanks to the application of an intumescent ring around the inside of the valve. Creating a fire retardant surface to keep the heat at bay.
Specifications
| Size Range | 641- 2 1/2” – 36”; R 2.5 – R36 661- 7” x 3” – 30” x 20”, K31 – K41 |
| Pressure ratings | 15 PSI working, 30 PSI test |
| Design | 316 stainless steel body and disc, Inconel upper stem, 17-4 lower stem, silicone/intumescent seat. |
| BUSHIP Drawing | #804-1749102/1749103 Rev. C. |
