UL 428B
Standard for Electrically Operated Valves for Diesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blends with Nominal Biodiesel Concentrations Up To 20 Percent (B20), Kerosene, and Fuel Oil

DETAILS
Edition Number:1SCC Approved:--
Edition Date:2015-06-05DOD Approved: --
Price Code:BANSI Approved: 2015-06-05
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 the fluids specified in 1.2. Electrically operated valves, other than automotive fuel valves, covered by these requirements are intended to be used in other than hazardous locations as defined in accordance with the National Electrical Code, ANSI/NFPA 70.

    1.2 Electrically operated valves for use in dispensing devices are intended for use with one or more of the following:

    a)    Diesel fuel and diesel/biodiesel blends with nominal biodiesel concentrations up to 5 percent (B0 – B5) formulated in accordance with the Standard Specification for Diesel Fuel Oils, ANSI/ASTM D975.

    b)    Diesel/biodiesel blends with nominal biodiesel concentrations from 5 percent up to 20 percent (B6 – B20) formulated in accordance with the Standard Specification for Diesel Fuel Oil, Biodiesel Blends (B6 – B20), ANSI/ASTM D7467.

    c)    Biodiesel (B99.9/B100) formulated in accordance with the Standard Specification for Biodiesel Fuel Blend Stock (B100) for Middle Distillate Fuels, ANSI/ASTM D6751.

    d)    Kerosene formulated in accordance with the Standard Specification for Kerosine, ANSI/ASTM D3699.

    e)    Fuel oil (heating oil) formulated in accordance with the Standard Specification for Fuel Oils, ANSI/ASTM D396.

    1.3 These requirements cover valves whose coils are powered by a Class 2 (low-voltage) source. Valves incorporating a high-voltage transformer with a low-voltage secondary as an integral part of the valve assembly, are also covered by these requirements.

    1.4 These requirements do not cover valves for use with fluids other than as specified in 1.2.

    1.5 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.

  • 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
          • 3 Glossary
        • CONSTRUCTION
          • 4 General
          • 5 Assembly
            • 5.1 All valves
            • 5.2 Safety valves
            • 5.3 Class 2 (low-voltage) valves
          • 6 Materials
            • 6.1 Metallic materials
            • 6.2 Nonmetallic materials
            • 6.3 Casting impregnation materials
            • 6.4 Internal parts – fluid compatibility
            • 6.5 Insulating Materials
          • 7 Fluid Connections
          • 8 Seals and Stuff Boxes
          • 9 Springs
          • 10 Diaphragms
          • 11 Operating Mechanisms
          • 12 Current-Carrying Parts
          • 13 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 and Bonding
          • 17 Protection of Users and Service Personnel
          • 18 Transformers, Coils and Motors
          • 19 Switches
          • 20 Spacings
            • 20.1 General
            • 20.2 High-voltage circuits
            • 20.3 Low-voltage circuits – and low-voltage safety-control circuits
            • 20.4 Other than safety-control circuits
          • 21 Alternate Spacing – Clearances and Creepage Distances
          • 22 Separation of Circuits
            • 22.1 General
            • 22.2 Barriers
        • PERFORMANCE
          • 23 General
          • 24 Input Test
          • 25 Temperature Test
          • 26 Long Term Exposure Test
            • 26.1 General
            • 26.2 Samples
            • 26.3 Method
            • 26.4 Results
          • 27 Operation Test
          • 28 Torque Test
            • 28.1 All valves
            • 28.2 Safety valves
          • 29 External Leakage Test
          • 30 Seat Leakage Test
          • 31 Endurance Test
          • 32 Vibration Test – Safety Valves
          • 33 Hydrostatic Strength Test
          • 34 Dielectric Voltage-Withstand Test
          • 35 Increased Potential Test
          • 36 Burnout Test
          • 37 Breakdown of Component Test
          • 38 Rain Test
          • 39 Hosedown Test
          • 40 Metallic Coating Thickness Test
          • 41 Clamped Insulating Joints in Lieu of Spacings
          • 42 Printed Wiring Board Abnormal Operation Test
          • 43 Sight Glass Impact Test
          • 44 Sight Glass Temperature Shock Test
        • MANUFACTURING AND PRODUCTION
          • 45 General
        • ELECTRICAL RATINGS
          • 46 Details
        • MARKING
          • 47 Details
          • 48 Cautionary Markings
          • 49 Visibility and Permanence of Markings
            • 49.1 General
            • 49.2 Unusual-condition exposure test
    • Test Fluids