UL 258

Overview

Outline of Investigation for Shutoff Valves for Trim and Drain Purposes

These requirements cover shutoff valves for trim and drain purposes for fire protection service. These valves are intended for installation in sprinkler systems in accordance with NFPA 13.

-Outline Title Page
-Table of Contents
-Body
INTRODUCTION
1 Scope
2 Components
3 Units of Measurement
4 Undated References
5 Glossary
CONSTRUCTION
6 Valve Sizes
7 Rated Pressure
8 Materials
9 Opening Characteristics
10 Inlet and Outlet Threads and Other Attachment Means
PERFORMANCE
11 General
12 10-Day Moist Ammonia Air Stress Cracking Test
13 Elastomeric Parts Test (Except Gaskets)
14 Leakage Test
14.1 General
14.2 Seat leakage
14.3 Body leakage
15 Strength of Body Test
16 Mechanical Strength Test
16.1 Valves with handles
16.2 Valves with handwheels
MANUFACTURING AND PRODUCTION TESTS
17 General
18 Production Leakage Test
MARKINGS
19 General
INSTRUCTIONS
20 Installation Instructions

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