UL 429
Standard for Electrically Operated Valves

DETAILS
Edition Number:7SCC Approved:--
Edition Date:2013-11-06DOD Approved: 1989-08-10
Price Code:AANSI Approved: --
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover electrically operated general purpose and safety valves rated 600 volts or less and intended for the control of fluids, such as air, gases, oils, refrigerants, steam, water, and the like. Electrically operated valves, other than automotive fuel valves, covered by these requirements are intended to be used in other than hazardous locations as defined by the National Electrical Code, NFPA 70.

    1.2 These requirements also cover electrically operated valves intended to be factory installed on or in certain appliances as operating or safety controls.

    1.3 These requirements do not cover automatic valves for gas appliances that are covered by the requirements in the Standard for Automatic Valves for Gas Appliances, ANSI Z21.21/CSA 6.5.

    1.4 These requirements do not cover valves employing electrical parts, including coils, switch contacts and resistance elements, located in the flammable gas containing compartment of a valve. Valves constructed as such shall comply with the requirements in the Standard for Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I, II, and III, Division 1, Hazardous (Classified) Locations, UL 913.

    1.5 When the valve assembly includes a pressure or flow regulator, its regulating ability is not covered by requirements in this standard.

    1.6 When a mechanically actuated indicator is provided to indicate whether the valve is open or closed, its visibility from any distance is not covered by requirements in this standard.

    1.7 In addition to the requirements in this standard, valves intended for fire protection service are required to comply with the Outline of Investigation for Electrically Operated Valves for Fire Protection Service, SU 429A.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 General
            • 2.1 Components
            • 2.2 Units of measurement
            • 2.3 Undated references
            • 2.4 Automotive-fuel valve
            • 2.5 Marine valve
          • 3 Glossary
        • CONSTRUCTION
          • 4 General
          • 5 Assembly
            • 5.1 All valves
            • 5.2 Safety valves
            • 5.3 Class 2 valves
          • 6 Materials
            • 6.1 All valves
            • 6.2 Safety valves and general purpose valves for flammable, combustible and hazardous fluids
            • 6.3 Synthetic rubber materials
            • 6.4 Corrosion protection
            • 6.5 Insulating materials
          • 7 Fluid Connections
          • 8 Seals and Stuffing Boxes
          • 9 Springs
          • 10 Diaphragms
            • 10.1 All valves
            • 10.2 Flammable and hazardous fluid valves
          • 11 Operating Mechanisms
          • 12 Current-Carrying Parts
          • 13 Electrical Enclosures
            • 13.1 General
            • 13.2 Metallic enclosures
            • 13.3 Polymeric enclosures
            • 13.4 Enclosure conduit connection
            • 13.5 Openings
            • 13.6 Accessibility of live parts
            • 13.7 Screens and expanded metal
            • 13.8 Rainproof, raintight, and watertight enclosures
            • 13.9 Corrosion protection
            • 13.10 Safety valves
          • 14 Field Wiring Connections
            • 14.1 General
            • 14.2 Leads
            • 14.3 Field wiring terminals
            • 14.4 Wiring space
          • 15 Internal Wiring
          • 16 Grounding
          • 17 Bonding
          • 18 Protection of Users and Service Personnel
          • 19 Transformers, Coils and Motors
          • 20 Switches
          • 21 Spacings
            • 21.1 General
            • 21.2 High-voltage circuits
            • 21.3 Class 2 safety valves and Class 2 safety-control circuits
            • 21.4 Other than safety valves and safety-control circuits
          • 22 Alternate Spacing – Clearances and Creepage Distances
          • 23 Separation of Circuits
            • 23.1 General
            • 23.2 Barriers
        • PERFORMANCE
          • 24 General
          • 25 Input Test
          • 26 Temperature Test
          • 27 Operation Test
            • 27.1 All valves
            • 27.2 Safety valves
          • 28 Torque Test
            • 28.1 All valves
            • 28.2 Safety valves
          • 29 External Leakage Test
          • 30 Seat Leakage Test
          • 31 Endurance Test
          • 32 Valve-Body Endurance Test
          • 33 Vibration Test – Safety Valves
          • 34 Hydrostatic Strength Test
          • 35 Valve-Body Distortion with Static Pressure Test
          • 36 Valve-Body Impact Test
          • 37 Dielectric Voltage-Withstand Test
          • 38 Increased Potential Test
          • 39 Burnout Test
          • 40 Breakdown of Component Test
          • 41 Valve Body Distortion Test
          • 42 Rain Test
          • 43 Hosedown Test
          • 44 Metallic Coating Thickness Test
          • 45 Salt Spray Test
          • 46 Immersion-Volume Change Test
          • 47 Immersion-Extraction Test
          • 48 Printed Wiring Board Abnormal Operation Test
          • 49 Sight Glass Impact Test
          • 50 Sight Glass Temperature Shock Test
          • 51 Dimensional Stability
          • 52 Coil Retainer Impact Test
          • 53 Coil Retainer Mechanical Strength
          • 54 Accelerated Hydrogen-Pressure Aging Test
          • 55 Clamped Insulating Joints in Lieu of Spacings
        • MANUFACTURING AND PRODUCTION TESTS
          • 56 General
        • ELECTRICAL RATINGS
          • 57 Details
        • MARKINGS
          • 58 Details
          • 59 Cautionary Markings
          • 60 Visibility and Permanence of Markings
            • 60.1 General
            • 60.2 Unusual-condition exposure test
    • MARINE USE ELECTRICALLY OPERATED SHUT-OFF VALVES FOR FLAMMABLE LIQUIDS
    • APPENDIX A