UL 428B-2015 UL Standard for Safety Electrically Operated Valves for Diesel Fuel Biodiesel Fuel Diesel Biodiesel Blends with Nominal Biodiesel Concentrations Up To 20 Percent (B20)_1.pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 428B Electrically Operated Valves for Diesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blends with Nominal Biodiesel Concentrations Up To 20 Percent (B20), Kerosene, and Fuel OilUL COPYRIGHTED

2、MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Electrically Operated Valves for Diesel Fuel, Biodiesel Fuel, Diesel/Biodie

3、sel Blends with Nominal Biodiesel Concentrations Up To 20 Percent (B20), Kerosene, and Fuel Oil, UL 428B First Edition, Dated June 5, 2015 Summary of Topics This is the rst edition of the Standard for Electrically Operated Valves for Diesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blends with Nominal

4、Biodiesel Concentrations Up To 20 Percent (B20), Kerosene, and Fuel Oil, ANSI/UL 428B. The effective date for UL LLC will be announced through Industry File Review Announcement Letter. The requirements are substantially in accordance with Proposal(s) on this subject dated October 17, 2014. All right

5、s reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expresse

6、d or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out

7、 of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the elect

8、ronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standa

9、rd on the purchasers computer system. JUNE 5, 2015 UL 428B tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JUNE 5, 2015 UL 428B tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOU

10、T PERMISSION FROM UL June 5, 2015 1 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 Prior to the rst edition, the requirements for the products covered by t

11、his standard were included in the Outline of Investigation 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, UL 428B. First Edition June 5, 2015 This ANSI/UL Standard for Saf

12、ety consists of the First Edition. The most recent designation of ANSI/UL 428B as an American National Standard (ANSI) occurred on June 5, 2015. ANSI approval for a standard does not include the Cover Page, Transmittal Pages and Title Page. Comments or proposals for revisions on any part of the Stan

13、dard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way.

14、All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2015 UNDERWRITERS LABORATORIES INC. ANSI/UL 428B-2015UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISS

15、ION FROM UL JUNE 5, 2015 UL 428B 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .6 2 General 7 2.1 Components .7 2.2 Units of measurement .7 2.3 Undated references .7 2.4 Automotive-fuel v

16、alve .7 3 Glossary .8 CONSTRUCTION 4 General 9 5 Assembly .10 5.1 All valves .10 5.2 Safety valves .10 5.3 Class 2 (low-voltage) valves 11 6 Materials 11 6.1 Metallic materials 11 6.2 Nonmetallic materials 12 6.3 Casting impregnation materials 15 6.4 Internal parts uid compatibility 15 6.5 Insulatin

17、g Materials 15 7 Fluid Connections 17 8 Seals and Stuff Boxes .18 9 Springs 19 10 Diaphragms .19 11 Operating Mechanisms .19 12 Current-Carrying Parts 19 13 Enclosures .20 13.1 General .20 13.2 Metallic enclosures .20 13.3 Polymeric enclosures .23 13.4 Enclosure conduit connection 24 13.5 Openings 2

18、5 13.6 Accessibility of live parts 27 13.7 Screens and expanded metal 29 13.8 Rainproof, raintight, and watertight enclosures .30 13.9 Corrosion protection 30 13.10 Safety valves .32 14 Field Wiring Connections 32 14.1 General .32 14.2 Leads .32 14.3 Field Wiring Terminals 33 14.4 Wiring space .35 1

19、5 Internal Wiring .35 16 Grounding and Bonding .36 17 Protection of Users and Service Personnel 36 18 Transformers, Coils and Motors 37 19 Switches 38 JUNE 5, 2015 UL 428B 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 20 Spacings 38 20.1

20、General .38 20.2 High-voltage circuits 39 20.3 Low-voltage circuits and low-voltage safety-control circuits 42 20.4 Other than safety-control circuits .43 21 Alternate Spacing Clearances and Creepage Distances .43 22 Separation of Circuits .44 22.1 General .44 22.2 Barriers .45 PERFORMANCE 23 Genera

21、l 45 24 Input Test .48 25 Temperature Test 48 26 Long Term Exposure Test .52 26.1 General .52 26.2 Samples 52 26.3 Method .53 26.4 Results .53 27 Operation Test .54 28 Torque Test .55 28.1 All valves 55 28.2 Safety valves 56 29 External Leakage Test 56 30 Seat Leakage Test .56 31 Endurance Test 57 3

22、2 Vibration Test Safety Valves .57 33 Hydrostatic Strength Test .57 34 Dielectric Voltage-Withstand Test 58 35 Increased Potential Test 59 36 Burnout Test 59 37 Breakdown of Component Test 60 38 Rain Test .61 39 Hosedown Test 64 40 Metallic Coating Thickness Test .64 41 Clamped Insulating Joints in

23、Lieu of Spacings 65 42 Printed Wiring Board Abnormal Operation Test .67 43 Sight Glass Impact Test .68 44 Sight Glass Temperature Shock Test .69 MANUFACTURING AND PRODUCTION 45 General .69 ELECTRICAL RATINGS 46 Details 70 MARKING 47 Details 70 48 Cautionary Markings 72 JUNE 5, 2015 UL 428B 4UL COPYR

24、IGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 49 Visibility and Permanence of Markings 73 49.1 General .73 49.2 Unusual-condition exposure test .73 SUPPLEMENT SA - MARINE USE ELECTRICALLY OPERATED SHUT-OFF VALVES FOR DIESEL FUEL, BIODIESEL FUEL, D

25、IESEL/BIODIESEL BLENDS WITH NOMINAL BODIESEL CONCENTRATIONS UP TO 20 PERCENT (B20), KEROSENE, AND FUEL OIL SA.1 Scope .SA1 SA2 Installation and Operating Instructions .SA1 SA3 General SA2 SA4 Materials .SA2 SA5 Electrical Connections .SA2 SA6 General SA3 SA7 Vibration Test SA3 SA8 Shock Test .SA3 SA

26、9 Ignition Protection Test SA4 SA10 Fire Test SA4 SA11 Operation and Temperature Tests .SA6 SA11.1 Low temperature .SA6 SA11.2 Abnormal operation SA6 SA11.3 Normal operation .SA7 SA12 Details SA7 SUPPLEMENT SB - Test Fluids SB.1 Representative Aggressive Combustible Test Fuel Mixtures .SB1 JUNE 5, 2

27、015 UL 428B 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 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 uids specied i

28、n 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 dened in accordance with the National Electrical Code, ANSI/NFPA 70. 1.2 Electrically operated valves for use in dispensing devices are i

29、ntended 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 Specication for Diesel Fuel Oils, ANSI/ ASTM D975. b) Diesel/biodiesel blends with nominal biodiesel

30、concentrations from 5 percent up to 20 percent (B6 B20) formulated in accordance with the Standard Specication for Diesel Fuel Oil, Biodiesel Blends (B6 B20), ANSI/ASTM D7467. c) Biodiesel (B99.9/B100) formulated in accordance with the Standard Specication for Biodiesel Fuel Blend Stock (B100) for M

31、iddle Distillate Fuels, ANSI/ASTM D6751. d) Kerosene formulated in accordance with the Standard Specication for Kerosine, ANSI/ ASTM D3699. e) Fuel oil (heating oil) formulated in accordance with the Standard Specication for Fuel Oils, ANSI/ASTM D396. 1.3 These requirements cover valves whose coils

32、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 uids other than as specied in 1.2. 1.

33、5 These requirements do not cover valves employing electrical parts, including coils, switch contacts and resistance elements, located in the ammable gas containing compartment of a valve. Valves constructed as such shall comply with the requirements in the Standard for Intrinsically Safe Apparatus

34、and Associated Apparatus for Use in Class I, II, and III, Division 1, Hazardous (Classied) Locations, UL 913. JUNE 5, 2015 UL 428B 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 General 2.1 Components 2.1.1 Except as indicated in 2.1.2,

35、a component of a valve covered by this standard shall comply with the requirements for that component. 2.1.2 A component is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this s

36、tandard, or b) Is superseded by a requirement in this standard. 2.1.3 A component shall be used in accordance with its rating established for the intended conditions of use. 2.1.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are

37、 intended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. 2.2 Units of measurement 2.2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate

38、 information. 2.2.2 Unless indicated otherwise all voltage and current values mentioned in this standard are root-mean-square (rms). 2.3 Undated references 2.3.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest

39、 edition of that code or standard. 2.4 Automotive-fuel valve 2.4.1 An automotive fuel valve shall comply with the requirements applicable to safety valves, UL 429. JUNE 5, 2015 UL 428B 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Gloss

40、ary 3.1 For the purpose of this standard the following denitions apply. 3.2 AUTOMOTIVE-FUEL VALVE An electrically operated valve rated for use with a direct current (DC) circuit and intended for use as a fuel-line shutoff valve on mobile equipment. 3.3 DIESEL/BIODIESEL BLEND Blended fuels composed o

41、f a diesel component and a biodiesel component. The numerical value corresponding to the biodiesel component determines the blend rating (such as B20 for 20% biodiesel, 80% diesel). 3.4 ELECTRICAL CIRCUITS a) Class 2 Circuit A circuit involving a potential of not more than 42.4 volts peak supplied b

42、y: 1) An isolating source that complies with the requirements in the Standard for Class 2 Power Units, UL 1310, or the requirements in the Standard for Low Voltage Transformers Part 1: General Requirements, UL 5085-1, and the Standard for Low Voltage Transformers Part 3: Class 2 and Class 3 Transfor

43、mers, UL 5085-3 2) A dry cell battery having output characteristics no greater than those of an inherently limited Class 2 transformer; or 3) A combination of a rechargeable battery and a xed impedance or regulating network that complies with the applicable performance requirements for an inherently

44、 limited Class 2 transformer. b) Low-Voltage Circuit A circuit involving a potential of not more than 30 volts ac (42.4 volts peak or direct current) and supplied from transformer output windings which are electrically isolated (i.e. insulated from ground). A circuit derived from a source of supply

45、classied as a high voltage circuit, by connecting resistance in series with the supply circuit as a means of limiting the voltage and current, is not considered to be a low voltage circuit. Unless the isolating transformer is provided as part of the valve or marked per 47.7, the circuit shall be con

46、sidered a high voltage circuit. c) High-Voltage Circuit A circuit involving a potential of not more than 600 volts and having circuit characteristics in excess of those of a low-voltage circuit. d) Intrinsically Safe Circuit A circuit in which any spark or thermal effect produced either normally or

47、in specied fault conditions, is incapable of causing ignition of a mixture of ammable or combustible material in air in the mixtures most easily ignited concentration under the test conditions specied in the Standard for Intrinsically Safe Apparatus and Associated Apparatus, for Use in Class I, II,

48、and III, Division 1, Hazardous (Classied) Locations , UL 913. e) Safety-Control Circuit A circuit involving one or more safety controls. 3.5 GENERAL PURPOSE VALVE Either a normally open or normally closed valve intended to control the ow of a uid. 3.6 MAXIMUM OPERATING PRESSURE DIFFERENTIAL The maxi

49、mum difference between the pressure at an inlet port and the pressure at an outlet port against which an electrically operated valve is intended to operate. JUNE 5, 2015 UL 428B 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.7 MAXIMUM RATED PRESSURE The maximum pressure to which the valve assembly may be subjected as specied by the manufacturer. 3.8 MINIMUM OPERATING PRESSURE DIFFERENTIAL The minimum diff