UL 1091

Please note: All interim revisions for this edition available at time of your purchase will be included.

Butterfly Valves for Fire-Protection Service

UL 1091

1 Scope

1.1 These requirements cover butterfly valves intended for use in piping systems supplying water for fire-protection service.

1.2 The valves covered by these requirements are intended for installation and use in accordance with the Standards for:

a) Low, Medium and High Expansion Foam, NFPA 11;

b) Installation of Sprinkler Systems, NFPA 13;

c) Installation of Standpipe and Hose Systems, NFPA 14;

d) Water Spray Fixed Systems for Fire Protection, NFPA 15;

e) Foam-Water Sprinkler and Foam-Water Spray Systems, NFPA 16;

f) Installation of Stationary Pumps for Fire Protection, NFPA 20;

g) Water Tanks for Private Fire Protection, NFPA 22; and

h) Installation of Private Fire Service Mains and Their Appurtenances, NFPA 24.