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Standard 1091, Edition 6

Standard for Butterfly Valves for Fire-Protection Service

UL CSDS Proposal
Standard 1091, Edition 6 Edition Date: February 19, 2010
Summary of Topics b1091_6_20100219_sum.html

Subject 1091

Bulletin Dated: February 19, 2010


The following changes in requirements to the Standard for Butterfly Valves for Fire-Protection Service, UL 1091, are being proposed:

1. Reference to Nominal Pipe Size

2. Guidelines for Conducting Operating Torque Value Calculations for Butterfly Valves

Back to Standard 1091, Edition 6

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