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UL 193
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UL 193 11th Edition, February 26, 2016 UL Standard for Safety Alarm Valves for Fire-Protection Service
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Description / Abstract:
These requirements cover alarm valves for use in automatic wet-pipe sprinkler systems for fire-protection service. Alarm valves covered by these requirements are of either the variable- or constant-pressure type and are of the swing-check pattern. Ordinarily, variable-pressure alarm valves are acceptable for constant-pressure service without alteration; however, in some designs, that part of the device having to do with the delaying of alarms may be omitted.
Alarm valves covered by these requirements include the sizes 1 – 12 inches, inclusive.
Alarm valves covered by these requirements are intended for installation and use in accordance with the Standard for the Installation of Sprinkler Systems, NFPA 13.
Alarm valves covered by these requirements include the sizes 1 – 12 inches, inclusive.
Alarm valves covered by these requirements are intended for installation and use in accordance with the Standard for the Installation of Sprinkler Systems, NFPA 13.