1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSeptember 12, 20121UL 162AOUTLINE OF INVESTIGATIONFORFIXED WATER-MOTOR COUPLED PUMPS FOR FOAM CONCENTRATEPROPORTIONINGIssue Number 1September 12, 2012Summary of TopicsThis is the first issue of t
2、he Outline of Investigation for Fixed Water-MotorCoupled Pumps for Foam Concentrate Proportioning, UL 162A.COPYRIGHT 2012 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSEPTEMBER 12, 2012UL 162A2No Text on This P
3、ageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 Components 43 Units of Measurement .54 Undated References 55 Glossary .5CONSTRUCTION6 General 67 Water-motor and Pump Casings .88 Rotors and Other Internal Comp
4、onents .89 Ball and Roller Bearings 810 Sleeve Bearings .1011 Shaft Seals 1012 Shafts 1113 Flexible Drive Coupling .1114 Relief Valves 1115 Piping .1116 Check Valves 1217 Trim and Drain Valves 12PERFORMANCE18 General 1219 Hydraulic Performance Test .1220 Hydrostatic Strength Tests 1321 Dry Operation
5、 and Self-Priming Tests 1322 Endurance Test 1323 Relief Valve Operation, Flow Capacity and Reseat Tests .1424 Relief Valve Leakage Test 1425 500 Cycle Operation Test .1426 Aging Tests of Flexible Drive Coupling, Polymeric Materials .15MANUFACTURING AND PRODUCTION TESTS27 General 16MARKINGS28 General
6、 16INSTRUCTIONS29 Installation and Operating Instructions 17SEPTEMBER 12, 2012 UL 162A 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover water-motor coupled pumps intended for supplying foam liqui
7、d concentrateto fire protection systems. These requirements are based on the premise that the minimum and maximumviscosity of foam liquid concentrate shall be investigated for use with the water-motor coupled pump.Water-motor coupled pumps shall comply with the requirements described herein, in addi
8、tion to theapplicable requirements in the Standard for Foam Equipment and Liquid Concentrates, UL 162, and theapplicable requirements in the Outline of Investigation for High-Expansion Foam-Extinguishing SystemEquipment and Concentrates, SU 139.1.2 Requirements for the design, installation, operatio
9、n, testing, and maintenance of foam systems for fireprotection are included in the Standard for Low-, Medium-, and High-Expansion Foam, NFPA 11, and theStandard for Installation of Foam-Water Sprinkler and Foam-Water Spray Systems, NFPA 16.2 Components2.1 Except as indicated in 2.2, a component of a
10、 product covered by this Outline of Investigation shallcomply with the requirements for that component.2.2 A component is not required to comply with a specific requirement that:a) Involves a feature or characteristic not required in the application of the component in theproduct covered by this Out
11、line of Investigation; orb) Is superseded by a requirement in this Outline of Investigation.2.3 A component shall be used in accordance with its rating established for the intended conditions ofuse.2.4 Specific components are incomplete in construction features or restricted in performance capabilit
12、ies.Such components are intended for use only under limited conditions, such as certain temperatures notexceeding specified limits, and shall be used only under those specific conditions.SEPTEMBER 12, 2012UL 162A4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT
13、PERMISSION FROM UL3 Units of Measurement3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.4 Undated References4.1 Any undated reference to a code or standard appearing in the requirements of this standard shall beinterpreted as
14、 referring to the latest edition of that code or standard.5 Glossary5.1 For the purpose of these requirements, the following definitions apply.5.2 CHECK VALVE A self- acting device that is designed to allow fluid flow in one direction.5.3 CHECK VALVE, POPPET-TYPE A check valve incorporating a disc o
15、r plug that moves uniformlyaway from or towards the valve seat.5.4 CHECK VALVE, SWING-TYPE A check valve incorporating a single clapper that rotates about afixed location.5.5 CORROSION-RESISTANT MATERIAL For water exposure, a material having resistance tocorrosion equivalent to or exceeding that of
16、a brass or bronze alloy, aluminium oxide or series 300stainless steel. For foam liquid concentrate exposure, a material having resistance to corrosionequivalent to or exceeding that of a brass or bronze alloy, or series 300 stainless steel.5.6 DRAIN VALVE, TWO WAY BALL VALVE A valve used as a shutof
17、f valve for drain purposesincorporating a closure mechanism that consists of a ported sphere installed within the valve body.Rotation of the sphere by 90 degrees changes the position from open to close. These valves aretypically provided with a handle type operating mechanism with stationary stops.5
18、.7 FLEXIBLE DRIVE COUPLING A device used to connect the shafts from a water motor to apump that permits minor angular and parallel misalignment while transmitting, at most, the maximumspecified torque.5.8 FOAM LIQUID CONCENTRATE A concentrated liquid foaming agent that is intended to bediluted with
19、water.5.9 PRESSURE, MAXIMUM WORKING For performance tests specified in this standard, the sum ofthe maximum net pressure developed by the pump and the maximum positive suction pressure markedon the pump, under any condition of intended use including the relief valve discharging 100 percent ofthe pum
20、p capacity with the valve set at its highest pressure setting. For production tests, this value maybe lower, based on the conditions imposed by the particular installation for which the pump isconstructed. Therefore, the values of maximum net pressure and maximum positive suction pressurethat are ma
21、rked on the pump are those that indicate the acceptability of a pump (the limiting pressures)for an installation.5.10 PRESSURE, NET (TOTAL HEAD) The algebraic difference in psi (kPa) between pressuresmeasured at the discharge outlet and at the suction inlet, corrected to the pump centerline andcorre
22、cted for differences in velocity head at the points of gauge attachment.SEPTEMBER 12, 2012 UL 162A 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL5.11 PUMP LOAD The brake horsepower (kW input) required to drive a pump at rated speed, and att
23、he capacity and net pressure (including the additional requirements associated with the operation of therelief valve) requiring maximum power for its intended use.5.12 PUMP, POSITIVE DISPLACEMENT A pump characterized by the use of gears, screws, lobes,cams, plungers, pistons or similar elements to c
24、arry and displace foam liquid concentrate. Therelationship of shaft speed and liquid flow is linear.5.13 RELIEF VALVE A valve capable of automatically relieving 100 percent of pump capacity at apressure not exceeding 125 percent of the valve set pressure.5.14 ROTOR A gear, vane, or similar element u
25、sed to carry and displace liquid.5.15 SET PRESSURE Internal pressure at which the relief valve is intended to start to allow the flowof liquid.5.16 TRIM VALVE, THREE WAY BALL VALVE A valve, used as a control valve, incorporating aclosure mechanism that consists of a ported sphere installed within th
26、e valve body. Rotation of thesphere by 90 degrees changes the position such that one of two inlets is open and the outlet remainsopen or the sphere changes position such that both inlets are closed. These valves are typicallyprovided with a handle type operating mechanism with stationary stops.5.17
27、WATER MOTOR, POSITIVE DISPLACEMENT A water motor characterized by the use ofgears, screws, lobes, cams or similar elements to transfer torque by the flow and displacement of water.5.18 WATER-MOTOR COUPLED PUMP A positive displacement water motor installed in the watersupply line that is coupled to a
28、 positive displacement pump to provide proportioning of foam liquidconcentrate.CONSTRUCTION6 General6.1 These requirements are intended to address water-motor coupled pumps; and, where applicable,their integral ancillary devices including piping and valves.6.2 A casting shall be smooth and free from
29、 scale, lumps, cracks, blisters, sand holes, and defects ofany nature that may affect the use for which it is intended. A casting shall not be plugged or filled, butmay be impregnated to remove porosity.6.3 A bolt, stud, cap screw, or gland swing bolt used to assemble parts subject to stress due to
30、fluidpressure shall have a nominal diameter of not less than 1/4-inch (6.4 mm).6.4 An interior bolt or screw that is exposed to foam liquid concentrate shall be a corrosion-resistantmaterial.SEPTEMBER 12, 2012UL 162A6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITH
31、OUT PERMISSION FROM UL6.5 The maximum stress on any bolt of a pressure-holding structure shall not exceed one-fourth theelastic limit of the material as computed by using the stress area. The stress area is defined by theequation:in which:Asis the stress area in square inches (m2 1550);D is the nomi
32、nal diameter of bolt in inches (mm 0.04); andn is the number of threads per inch (25.4 mm).6.5.1 The load on the bolts is to be computed on the basis of the internal fluid pressure equivalent to themaximum working pressure effective over the area out to the centerline of the bolts.6.6 A part that be
33、ars against, rotates within, or slides on stationary parts, and that must be free to moveduring operation shall either:a) Be made of corrosion-resistant material, such as bronze, brass, chrome-plated bronze,monel metal, or the like; orb) Be fitted with bushings, inserts, or other parts made of the c
34、orrosion-resistant materialsspecified in (a) at those points where freedom of motion is required.6.7 Flange dimensions and bolt layouts used in pipe connections shall comply with the requirements inthe Standard for Cast Iron Pipe Flanges and Flanged Fittings, ANSI/ASME B16.1, or other national orint
35、ernational pipe flange standards.6.8 A threaded opening used for pipe connection shall comply with the requirements in the Standard forPipe Threads, General Purpose, ANSI/ASME B1.20.1, or other national or international pipe threadstandards.6.9 Grooved end connections shall comply with the requireme
36、nts in the Standard for Grooved andShouldered Joints, ANSI/AWWA C606, or other national or international grooved standards.SEPTEMBER 12, 2012 UL 162A 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL7 Water-motor and Pump Casings7.1 The water-
37、motor and pump casings shall be constructed of a corrosion resistant material.7.2 The water motor casing shall be provided with flanged, threaded, or grooved piping connections onthe inlet and outlet.7.3 The water-motor coupled pump shall be provided with provisions for accommodating proper supporta
38、nd alignment.7.4 The water-motor and pump casing shall be provided with threaded connections intended for draining.8 Rotors and Other Internal Components8.1 The rotor, wear ring liners, interior nuts, glands, sleeve bearings, drain plugs and other interiorcomponents shall be constructed of a corrosi
39、on-resistant material.8.2 The rotors shall be secured in an axial direction on the pump shaft or hydraulically balanced,permitting no contact with the casing under operating conditions.9 Ball and Roller Bearings9.1 Ball and roller bearings shall have an L-10 rating of not less than 5000 hours at max
40、imum pump load(maximum hydraulic load on the largest rotor operated at any point on its rated speed curve) inaccordance with the Standard for Load Ratings and Fatigue Life for Ball Bearings, ANSI/ABMA 9, and theStandard for Load Ratings and Fatigue Life for Roller Bearings, ANSI/ABMA 11, respectivel
41、y.9.2 With reference to 9.1, the L-10 rating in hours is to be calculated from the L-10 rating in revolutionsbased on the following equation:Lh=(L10x106)/(Nx60)in which:This is generated text for figtxt.SEPTEMBER 12, 2012UL 162A8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTR
42、IBUTION WITHOUT PERMISSION FROM ULwhere:Lhis the L-10 rating in hours;L10is the L-10 rating in millions of revolutions;N is the rated speed in revolutions per minute;C is the dynamic load rating of bearing in pounds-force;P is the combined force on bearing in pounds;X is the radial load factor of be
43、aring;Fris the radial load on bearing in pounds-force;Y is the axial load factor of bearing; andFais the axial load on bearing in pounds-force.9.3 The shaft bearing of the water motor shall not carry the axial or radial forces of the pump.9.4 Grease lubricated bearing housings shall be equipped with
44、 a tapped opening, plug, grease fitting anda relief hole, or relief grease fitting.Exception: Bearings constructed such that additional lubrication is not necessary shall not require agrease fitting or relief hole.9.5 Bearings and their races shall be constructed of a case-hardened material or a mat
45、erial hardenedthroughout.9.6 Bearings shall be securely fitted to prevent axial movement.SEPTEMBER 12, 2012 UL 162A 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL10 Sleeve Bearings10.1 Sleeve bearings shall be constructed of a corrosion-res
46、istant material and lubricated by the pumpedliquid.11 Shaft Seals11.1 A water motor and pump shall be provided with mechanical or lip seals.11.2 The seals shall be used within the seal manufacturers specifications for pressure, peripheralvelocity (based upon shaft rotational speed), shaft or sleeve
47、finish, maximum shaft deflection andalignment with shaft.11.3 As specified by the seal manufacturer, the shaft seals used in the water motor coupled pumpproportioner shall be suitable for positive pressure conditions and, if required by their application, vacuumconditions.11.4 As specified by the se
48、al manufacturer, the seal shall be constructed to provide for leak tightnessduring both operating and non-operating conditions.11.5 Parts in contact with the liquid shall be corrosion resistant.11.6 A lip seal shall be provided with a primary seal material constructed of polytetrafluoroethene (PTFE)
49、or another material that provides equivalent or better seal performance.11.7 The mating surfaces of a mechanical seal shall be one of the following material combinations or amating surface combination that provides seal performance at least equivalent to one of these materialcombinations:a) Silicon carbide to silicon carbide;b) Carbon to silicon carbide; orc) Carbon to tungsten carbide.SEPTEMBER 12, 2012UL 162A10UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL12 Shafts12.1 The maximum co
