1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNovember 2, 20121UL 428BOUTLINE OF INVESTIGATIONFORELECTRICALLY OPERATED VALVES FOR DIESEL FUEL, BIODIESEL FUEL,DIESEL/BIODIESEL BLENDS WITH NOMINAL BIODIESELCONCENTRATIONS UP TO 20 PERCENT (B20)
2、, KEROSENE, AND FUEL OILIssue Number: 1November 2, 2012Summary of TopicsThis is the first issue of the Outline of Investigation for ElectricallyOperated Valves for Diesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blendswith Nominal Biodiesel Concentrations Up To 20 Percent (B20), Kerosene,and Fuel Oil.
3、COPYRIGHT 2012 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNOVEMBER 2, 2012UL 428B2No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULC
4、ONTENTSINTRODUCTION1 Scope .62 General 72.1 Components .72.2 Units of measurement .72.3 Undated references .72.4 Automotive-fuel valve .73 Glossary .8CONSTRUCTION4 General 95 Assembly .105.1 All valves .105.2 Safety valves .105.3 Class 2 (low-voltage) valves 116 Materials 116.1 Metallic materials 11
5、6.2 Nonmetallic materials 126.3 Casting impregnation materials 156.4 Internal parts fluid compatibility 156.5 Nonmetallic materials for electrical insultion 17 Fluid Connections 188 Seals and Stuff Boxes .199 Springs 2010 Diaphragms .2011 Operating Mechanisms .2012 Current-Carrying Parts 2113 Enclos
6、ures .2113.1 General 113.2 Accessibility of live parts 2613.3 Rainproof, raintight, and watertight enclosures .2813.4 Corrosion protection of enclosure parts .2913.5 Safety valves 3014 Field Wiring Connections 3014.1 General .3014.2 Leads .3114.3 Terminals .3214.4 Wiring space .3315 Internal Wiring
7、.3316 Grounding .3417 Protection of Users and Service Personnel 3518 Transformers, Coils and Motors 3519 Switches 3620 Spacings 3620.1 General .3620.2 High-voltage circuits .220.3 Low-voltage circuits and low-voltage safety-control circuits 4020.4 Other than safety-control circuits .40NOVEMBER 2, 20
8、12 UL 428B 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL21 Alternate Spacing Clearances and Creepage Distances .4022 Separation of Circuits .4222.1 General .4222.2 Barriers .43PERFORMANCE23 General 4324 Input Test .4525 Temperature Test .2
9、26 Long Term Exposure Test .4926.1 General .4926.2 Samples 4926.3 Method .4926.4 Results .5027 Operation Test .5028 Torque Test .5128.1 All valves 5128.2 Safety valves 5229 External Leakage Test 5230 Seat Leakage Test .5231 Endurance Test 5332 Vibration Test Safety Valves .5333 Hydrostatic Strength
10、Test .5334 Dielectric Voltage-Withstand Test 5435 Increased Potential Test 5536 Burnout Test 5637 Breakdown of Component Test 5638 Rain Test .5739 Hosedown Test 6040 Metallic Coating Thickness Test .60MANUFACTURING AND PRODUCTION TESTS41 General .61ELECTRICAL RATINGS42 Details 62MARKINGS43 Details 6
11、244 Cautionary Markings 6445 Visibility and Permanence of Markings 6545.1 General .6545.2 Unusual-condition exposure test .65NOVEMBER 2, 2012UL 428B4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSUPPLEMENT SA - MARINE USE ELECTRICALLY OPERAT
12、ED SHUT-OFF VALVES FOR DIESELFUEL, BIODIESEL FUEL, DIESEL/BIODIESEL BLENDS WITH NOMINAL BODIESELCONCENTRATIONS UP TO 20 PERCENT (B20), KEROSENE, AND FUEL OILSA.1 Scope .SA1SA2 Installation and Operating Instructions .SA1SA3 General SA2SA4 Materials .SA2SA5 Electrical Connections .SA2SA6 General SA3S
13、A7 Vibration Test SA3SA8 Shock Test .SA3SA9 Ignition Protection Test SA4SA10 Fire Test SA4SA11 Operation and Temperature Tests .SA6SA11.1 Low temperature .SA6SA11.2 Abnormal operation SA6SA11.3 Normal operation .SA7SA12 Details SA7SUPPLEMENT SB - Test FluidsSB.1 Representative Aggressive Combustible
14、 Test Fuel Mixtures .SB1Superseded requirements for the Outline of Investigation for Electrically Operated Valves forDiesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blends with Nominal Biodiesel Concentrations UpTo 20 Percent (B20), Kerosene, and Fuel OilUL 428B, First Issue6.5 Nonmetallic materials f
15、or electrical insulation A113.1 General A120.2 High-voltage circuits .A225 Temperature Test A2NOVEMBER 2, 2012 UL 428B 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover electrically operated gener
16、al purpose and safety valves rated 600 volts orless and intended for the control of the fluids specified in 1.2. Electrically operated valves, other thanautomotive fuel valves, covered by these requirements are intended to be used in other than hazardouslocations as defined in accordance with the Na
17、tional Electrical Code, ANSI/NFPA 70.1.2 Electrically operated valves for use in dispensing devices are intended for use with one or more ofthe following:a) Diesel fuel and diesel/biodiesel blends with nominal biodiesel concentrations up to 5 percent(B0 B5) formulated in accordance with the Standard
18、 Specification for Diesel Fuel Oils, ANSI/ASTM D975.b) Diesel/biodiesel blends with nominal biodiesel concentrations from 5 percent up to 20percent (B6 B20) formulated in accordance with the Standard Specification for Diesel Fuel Oil,Biodiesel Blends (B6 B20), ANSI/ASTM D7467.c) Biodiesel (B99.9/B10
19、0) formulated in accordance with the Standard Specification forBiodiesel 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
20、 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. Valvesincorporating a high-voltage transformer with a low-voltage secondary as an integral part of the valveassembly, are also covered by these requirem
21、ents.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 contactsand resistance elements, located in the flammable gas containing compartment of a valve. Valvescon
22、structed as such shall comply with the requirements in the Standard for Intrinsically Safe Apparatusand Associated Apparatus for Use in Class I, II, and III, Division 1, Hazardous (Classified) Locations, UL913.NOVEMBER 2, 2012UL 428B6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
23、DISTRIBUTION WITHOUT PERMISSION FROM UL2 General2.1 Components2.1.1 Except as indicated in 2.1.2, a component of a valve covered by this outline shall comply with therequirements for that component.2.1.2 A component is not required to comply with a specific requirement that:a) Involves a feature or
24、characteristic not required in the application of the component in theproduct covered by this outline, orb) Is superseded by a requirement in this outline.2.1.3 A component shall be used in accordance with its rating established for the intended conditions ofuse.2.1.4 Specific components are incompl
25、ete in construction features or restricted in performancecapabilities. Such components are intended for use only under limited conditions, such as certaintemperatures not exceeding specified limits, and shall be used only under those specific conditions.2.2 Units of measurement2.2.1 Values stated wi
26、thout parentheses are the requirement. Values in parentheses are explanatory orapproximate information.2.2.2 Unless indicated otherwise all voltage and current values mentioned in this standard areroot-mean-square (rms).2.3 Undated references2.3.1 Any undated reference to a code or standard appearin
27、g in the requirements of this standard shallbe interpreted as referring to the latest edition of that code or standard.2.4 Automotive-fuel valve2.4.1 An automotive fuel valve shall comply with the requirements applicable to safety valves.NOVEMBER 2, 2012 UL 428B 7UL COPYRIGHTED MATERIAL NOT AUTHORIZ
28、ED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3 Glossary3.1 For the purpose of this outline the following definitions 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 valv
29、e on mobile equipment.3.3 DIESEL/BIODIESEL BLEND Blended fuels composed of a diesel component and a biodieselcomponent. 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 cir
30、cuit involving a potential of not more than 42.4 volts peak supplied by:1) An isolating source that complies with the requirements in the Standard for Class 2Power Units, UL 1310, or the requirements in the Standard for Low VoltageTransformers Part 1: General Requirements, UL 5085-1, and the Standar
31、d for LowVoltage Transformers Part 3: Class 2 and Class 3 Transformers, UL 5085-32) A dry cell battery having output characteristics no greater than those of an inherentlylimited Class 2 transformer; or3) A combination of a rechargeable battery and a fixed impedance or regulatingnetwork that complie
32、s with the applicable performance requirements for an inherentlylimited Class 2 transformer.b) Low-Voltage Circuit A circuit involving a potential of not more than 30 volts ac (42.4 voltspeak or direct current) and supplied from transformer output windings which are electricallyisolated (i.e. insula
33、ted from ground). A circuit derived from a source of supply classified as ahigh voltage circuit, by connecting resistance in series with the supply circuit as a means oflimiting the voltage and current, is not considered to be a low voltage circuit. Unless theisolating transformer is provided as par
34、t of the valve or marked per 43.7, the circuit shall beconsidered a high voltage circuit.c) High-Voltage Circuit A circuit involving a potential of not more than 600 volts and havingcircuit characteristics in excess of those of a low-voltage circuit.d) Intrinsically Safe Circuit A circuit in which a
35、ny spark or thermal effect produced eithernormally or in specified fault conditions, is incapable of causing ignition of a mixture offlammable or combustible material in air in the mixtures most easily ignited concentration underthe test conditions specified in the Standard for Intrinsically Safe Ap
36、paratus and AssociatedApparatus, for Use in Class I, II, and III, Division 1, Hazardous (Classified) 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 tocontrol the flow of a
37、 fluid.3.6 MAXIMUM OPERATING PRESSURE DIFFERENTIAL The maximum difference between thepressure at an inlet port and the pressure at an outlet port against which an electrically operated valveis intended to operate.NOVEMBER 2, 2012UL 428B8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION
38、 ORDISTRIBUTION WITHOUT PERMISSION FROM UL3.7 MAXIMUM RATED PRESSURE The maximum pressure to which the valve assembly may besubjected as specified by the manufacturer.3.8 MINIMUM OPERATING PRESSURE DIFFERENTIAL The minimum difference between thepressure at an inlet port and the pressure at an outlet
39、 port required for operation of the valve.3.9 RAINPROOF ENCLOSURE An enclosure that prevents rain from interfering with the intendedoperation of apparatus within the enclosure.3.10 RAINTIGHT ENCLOSURE An enclosure that, when exposed to a beating rain, does not permitwater to enter the enclosure.3.11
40、 SAFETY VALVE A normally closed valve intended to be actuated by a safety control or by anemergency device to prevent the delivery of a fluid that can result in risk of fire.3.12 SEALS, DYNAMIC A seal that is subject to mechanical movement or other applied forces thatresult in movement or flexing of
41、 the seal under normal use conditions.3.13 SEALS, STATIC A seal that is not subject to mechanical movement or other applied forcesother than compression forces that are applied during installation and maintained during normal useconditions.3.14 SWITCH A contact device actuated by the valve mechanism
42、 and intended to control electricalloads that are internal or external to the valve.a) Safety Switch A switch that opens and closes a safety-control circuit, or one intended foruse as an interlock in a safety-control circuit.b) Nonsafety Switch A switch not associated with a safety-control circuit.3
43、.15 WATERTIGHT ENCLOSURE An enclosure that, when subjected to the application of a hosestream as described in the Hosedown Test, Section 39, does not permit water to enter the enclosure.CONSTRUCTION4 General4.1 Valves shall be constructed so that they comply with the rules for installation and use o
44、f suchequipment as given in the National Electrical Code, NFPA 70.4.2 Fluid confining parts, except gaskets and seals, shall be constructed of metallic materials.NOVEMBER 2, 2012 UL 428B 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL5 Assem
45、bly5.1 All valves5.1.1 A valve shall include all the components necessary for its intended function and installation. Thecomponents shall be constructed for assembly as a unit.5.1.2 Two or more subassemblies intended to be assembled in the field as a unit shall be capable ofbeing joined together wit
46、hout requiring any of the subassemblies to be cut, drilled, welded, or otherwisealtered.5.1.3 If two or more valves or actuating devices, or both, are intended to be used together as one unit,the entire assembly is to be considered and tested as one valve.5.1.4 The construction of a valve shall be s
47、uch that parts can be reassembled after being dismantled tothe extent needed for servicing.5.1.5 A screwed cap or cover that constitutes a fluid-confining part, and that is intended to be removedfor servicing a valve, shall require the use of a tool for removal.5.1.6 A seat disc shall be attached to
48、 its poppet or holder or be otherwise assembled to prevent it frombecoming dislocated under service conditions. The disc may be secured by crimping, staking, or theequivalent, or by means of a chemical bond achieved by vulcanization in a controlled molding process.Cement or adhesive shall not be use
49、d as the sole means for securing a disc.5.1.7 The valve assembly shall withstand the stresses and vibration of intended operation, as determinedby compliance with the Endurance Test, Section 28.5.2 Safety valves5.2.1 A safety valve shall not depend on an outside source of energy, such as electricity, to function asa safety shutoff.5.2.2 A safety valve shall close independently of the energy supplied by the medium flowing. However,the medium flowing may be used to exert supplementary closing forces on the valve seat.5.2.3 A
