WALWORTH Solid Wedge Slab Gate Valves Carbon Steel and ...

WALWORTHSolid Wedge Slab GateValvesCarbon Steel andStainless SteelClass 150 to 900

INDEXIntroduction 1Walworth Quality 2, 3Design Features for Slab Gate Valves 4, 5, 6Trim Material 7Solid Wedge Slab Gate Valves Class 150 8, 9Solid Wedge Slab Gate Valves Class 300 10, 11Solid Wedge Slab Gate Valves Class 600 12, 13Solid Wedge Slab Gate Valves Class 900 14Chemical Composition and Mechanical Properties 15Pressure-Temperature Ratings 16Specifications for Seat Materials 18Materials Selection 19, 20, 21, 22,23, 24, 25Accessories 26, 27Applicable Standards and Codes 28FIGURE NUMBER INDEXDESCRIPTION FIGURE PAGESOLID WEDGE VALVE (SLAB GATE) CLASS 150 1912, 1913, 1922, 1923 8, 9SOLID WEDGE VALVE (SLAB GATE) CLASS 300 3912, 3913, 3922, 3923 10, 11SOLID WEDGE VALVE (SLAB GATE) CLASS 600 6912, 6913, 6922, 6923 12, 13SOLID WEDGE VALVE (SLAB GATE) CLASS 900 9912, 9913, 9922, 9923 14NUMBERING SYSTEM FOR WALWORTH SLAB GATE VALVE FIGURESX X X XANSI CLASS1=1503=3006=6009=9005=15002=2500MODEL9=SOLIDWEDGE SLABGATE VALVEOPERATOR1=LEVER2=GEAR OPERATOR3=PNEUMATIC ACTUATORELECTRIC ACTUATORHYDROPNEUMATICACTUATORENDS2=FLANGEDRAISED FACE3=FLANGED RINGTYPE JOINT4=BUTTWELD

Manufacturing Facility in the city ofTepotozotlan, Edo. de Mexico, MexicoFounded in 1842, Walworth has been leader in the valve industry since its inception, continuingto utilize the latest technology for product improvement and the development of new products. Today,Walworth offers complete lines of industrial valves in a variety of configurations, sizes, pressure classesand materials.Walworth continues to meet and exceed the quality standards required for products used in Nuclear,Military, industrial and process installations. These valves are manufactured under and comply with strictinternational standards such as API, ANSI, ASME, ASTM, MSS, NACE, AWWA, BSI, CSA, etc.Walworth Engineers are continuously evaluating our existing product utilizing all of today's advancedanalysis and engineering tools to assure that our valves conform to customer requirements as well asindustry standards.New designs are made following the same rigorous methodology and are tested in our laboratory underactual load/pressure conditions. Additionally, they are subjected to cyclic operation under pressure todetermine wear/life expectancy.All Walworth manufacturing facilities operate under quality systems such as the International standardsorganization ISO-9001 series and the American Petroleum Institute API Q1 Specifications for quality.These systems have been in place for more than ten years and are audited for compliance by independentauditors for ISO and/or API as well as by such customers as BP/Arco, Shell Oil, Exxon/Mobil, Texaco,Dow Chemical, etc.Casting and forging product quality is assured through close control of our own foundry and forgingfacilities. The same type of close control is exercised over all of our suppliers through continuousverification of materials and part, form, fit and function.The Walworth group of enterprises is dedicated to the design; manufacture and servicing of flow controlproducts that effectively meet our customer's requirements.

The complete line of Walworth products are manufactured under a controlled Quality Assurance Systemwith documented procedures that meet all industry specifications and customer requirements. Theseprocedures and controls include raw material purchasing and verification, process controls, assembly, testand shipping with all required documentation.The Walworth Quality Assurance System is documented in a Manual that has been approved by ISO-9001 certificate and is licensed by API to monogram API 6A and API 6D product under the API Q1monogram program.Each valve undergoes a design validation through a function and pressure test to demonstrateconformance to requirements, this results in a Material Test Report (MTR) documenting the chemical andmechanical properties for the pressure containing parts that is traceable to the valve serial number. Theresults of any additional non-destructive examinations (NDE) are also recorded and referenced to thevalve serial number.All valves are identified and marked conforming to the requirements of MSS SP-25 both on the valvebody and valve name plate.

SOLID WEDGE VALVESCARBON STEEL ANDSTAINLESS STEEL

DESIGN FEATURESThe design of the Walworth Solid Wedge Valves(Slab Gate) is highly used in pipelines systemswhere the main fluids are gas, oil and petroleumderivates.Valves can be defined as elements which controlfluids in any conduction lines, the WalworthSolid Wedge Valves (Slab Gate) are bidirectionaland can be installed in any of theirends in order to perform properly.Walworth Solid Wedge Valves (Slab Gate) havefull and continuous bore, which means that theport, seats and wedge are aligned between eachother having as a consequence an easy-to-cleanvalve, minimum pressure drop and a very smalllevel of residual concentration. When the valveis in open position, it allows the pass of objectsand residual elements that can damage thevalve’s sealing system.WedgeWedge Open PositionBodySeatSealCheck ValveStemBodySeatWedgeGreaseFittingsBodySecondary Sealing SystemNo need for LubricationIn normal operation conditions, thevalve does not need lubrication in order to keepthe sealing in optimum conditions because theSolid Wedge Valve (Slab Gate) is design so thatthe seat ring and the seal (Teflon or Nylon)achieve an hermetic seal.When the fluid contains excessive foreignmaterials there’s the possibility that the seal(Teflon or Nylon) may suffer some damages, inthis case, the valve is equipped with anemergency sealing system by means of greaseinjection; the grease is distributed all over theDouble Block and Purgesurface of the wedge and seat through twofittings located at the center of the valve.Double Block and PurgeThe Solid Wedge Valves (Slab Gate) complywith the design feature of Double Block andPurge which is achieved by its hermetic sealingsystem that consists in the use of an “O” Ringand the floating of the seats in an independentway.When the valve is in open or closed position,the Teflon seal is projected against the wedgeface achieving the seal at low pressure.

DESIGN FEATURES

TRIM MATERIALNo. Part Standard Stainless Steel Sour Service (NACE) Low Temperature Service1 Body ASTM A216 WCB ASTM A351 CF8M ASTM A216 WCB ASTM A352 LCB2 Wedge ASTM A515 Gr.70/ENP ASTM A182 F316 ASTM A515 Gr.70/ENP ASTM A515 Gr.70/ENP3 Stem ASTM A276 T410 ASTM A276 T410 ASTM A276 T410 ASTM A276 T4104 Seat ASTM A515 Gr.70/ENP ASTM A182 F316 ASTM A515 Gr.70/ENP ASTM A350 LF2/ENP5 Stem Sleeve ASTM A216 WCB ASTM A182 F316 ASTM A216 WCB ASTM A352 LCB6 Cover or ASTM A216 WCB ASTM A351 CF8M ASTM A216 WCB ASTM A352 LCBBonnet7 Seat “O” Ring VITON VITON VITON VITON8 “O” Ring VITON VITON VITON VITON9 Gasket GRAPHITE GRAPHITE GRAPHITE GRAPHITEASTM A108 Gr.1020 ASTM A108 Gr.1020 ASTM A108 Gr.1020 ASTM A108 Gr.102010 PackingBushing11 Cover Studs ASTM A193 B7 ASTM A193 B8 ASTM A193 B7M ASTM A320 L7M12 Stud Nuts ASTM A194 2H ASTM A194 Gr:8 ASTM A194 2HM ASTM A194 L7M13 Drain CARBON STEEL STAINLESS STEEL CARBON STEEL CARBON STEEL14 Sleeve Screws ASTM A193 B7 ASTM A193 B8 ASTM A193 B7M ASTM A320 L7M15 Sleeve Screw ASTM A194 2H ASTM A194 Gr:8 ASTM A194 2HM ASTM A194 L7MNuts16 Stem Packing TYPE V CHEVRON TYPE V CHEVRON TYPE V CHEVRON TYPE V CHEVRON17 Screws ASTM A193 B7 ASTM A193 B7 ASTM A193 B7 ASTM A193 B718 Nuts ASTM A194 2H ASTM A194 2H ASTM A194 2H ASTM A194 2H19 Stem Protector CARBON STEEL CARBON STEEL CARBON STEEL CARBON STEEL20 Indicating link ASTM A108 Gr.1020 ASTM A108 Gr.1020 ASTM A108 Gr.1020 ASTM A108 Gr.102021 Grease Fitting CARBON STEEL STAINLESS STEEL CARBON STEEL CARBON STEEL22 Packing CARBON STEEL STAINLESS STEEL CARBON STEEL CARBON STEELinjector*23 Purging device CARBON STEEL CARBON STEEL CARBON STEEL CARBON STEEL24 Stem nut ASTM A439 D2 ASTM A439 D2 ASTM A439 D2 ASTM A439 D225 Handwheel CARBON STEEL CARBON STEEL CARBON STEEL CARBON STEEL26 Operator IRON/CARBON STEEL IRON/CARBON STEEL IRON/CARBON STEEL IRON/CARBON STEEL*27 ID plate STAINLESS STEEL STAINLESS STEEL STAINLESS STEEL STAINLESS STEELENP = Electroless Nickel (0.003”)*Not shown

SOLID WEDGE VALVES (SLAB GATE)‣ FULL BORE CLASS 150CASTING CARBON STEELPURGING DEVICE: 6” AND LARGERHANDWHEELFIGURE END1912 RF1913 RTJGEAR OPERATORFIGUREEND1922 RF1923 RTJDimensions and WeightsSIZEVALVEmminchDmminchA RF mminchA RTJ mminchBmminchB1mminchCmminchEMminchWEIGHTkgW/HANDWHEEL poundWEIGHTkgW/OPERATOR pound512512.001787.001917.5045018----2501013052351----763763.002038.002168.5061024----3001218074599----10241024.002299.002419.507002878031300122148521158719215261526.0026710.5027911.008953597538350143001210523114030920382038.0029211.5030512.0011304412104835014388151403091753862541025410.0033013.0034313.501290511370544001647519240529275606

SOLID WEDGE VALVES (SLAB GATE)‣ FULL BORE CLASS 150CASTING CARBON STEELPURGING DEVICE: 6” AND LARGERHANDWHEELFIGURE END1912 RF1913 RTJGEAR OPERATORFIGUREEND1922 RF1923 RTJDimensions and WeightsSIZEVALVEmminchDmminchA RF mminchA RTJ mminchBmminchB1mminchCmminchEMminchWEIGHTkgW/HANDWHEEL poundWEIGHTkgW/OPERATOR pound3051230512.0035614.0036814.50148058156061450185472230066135077235614336.513.2538115.0039415.501660651720684501862525460101451011244061638715.2440616.0041916.501850731930765002071228560123561013454571843817.2443217.0044517.502080822160855002078531780172083018305082048919.2545718.0047018.50230091238094600248803510502315115025356102459023.2350820.0052120.5026801062760109800311045411680370417803924

SOLID WEDGE VALVES (SLAB GATE)‣ FULL BORE CLASS 300CASTING CARBON STEELPURGING DEVICE: 6” AND LARGERHANDWHEELFIGURE END3912 RF3913 RTJGEAR OPERATORFIGUREEND3922 RF3923 RTJDimensions and WeightsSIZEVALVEmminchDmminchA RF mminchA RTJ mminchBmminchB1mminchCmminchEMminchWEIGHTkgW/HANDWHEEL poundWEIGHTkgW/OPERATOR pound512512.002168.502329.1045018----2501013052760----763763.0028311.1029811.7061024----30012180755121----10241024.0030512.0032112.6070028780313001221486614611024315261526.0040315.9041916.508953597538350143001214030918039720382038.0041916.5043517.1011304412104835014388151813992204852541025410.0045718.0047318.601290511370544001647519308679350772

SOLID WEDGE VALVES (SLAB GATE)‣ FULL BORE CLASS 300CASTING CARBON STEELPURGING DEVICE: 6” AND LARGERHANDWHEELFIGURE END3912 RF3913 RTJGEAR OPERATORFIGUREEND3922 RF3923 RTJDimensions and WeightsSIZEVALVEmminchDmminchA RF mminchA RTJ mminchBmminchB1mminchCmminchEMminchWEIGHTkgW/HANDWHEEL poundWEIGHTkgW/OPERATOR pound3051230512.0050219.8051820.40148058156061450185472240789745099235614336.513.2576230.0077830.601660651720684501862525577127262013674061638715.2483833.0085433.601850731930765002071228698153974016314571843817.2491436.0093036.60208082216085500207853111112449116025575082048919.2599139.00101039.80230091238094600248803514083104145031976102459023.23114345.00116545.9026801062760109800311045412123468021704784

SOLID WEDGE VALVES (SLAB GATE)‣ FULL BORE CLASS 600CASTING CARBON STEELPURGING DEVICE: 6” AND LARGERHANDWHEELFIGURE END6912 RF6913 RTJGEAR OPERATORFIGUREEND6922 RF6923 RTJDimensions and WeightsSIZEVALVEmminchDmminchA RF mminchA RTJ mminchBmminchB1mminchCmminchEMminchWEIGHTkgW/HANDWHEEL poundWEIGHTkgW/OPERATOR pound512512.0029211.5029511.6045818.03550222501015866013297214763763.0035614.0035914.1061524.21695273001222599320513028710241024.0043217.0043517.1071027.9579031350142551010823815033115261526.0055922.0056222.1090035.4398039350143301322549626558420382038.0066026.0066426.10113544.6912154835014410163858494259372541025410.0078731.0079131.10140155.16148058400164901953911885801279

SOLID WEDGE VALVES (SLAB GATE)‣ FULL BORE CLASS 600CASTING CARBON STEELPURGING DEVICE: 6” AND LARGERHANDWHEELFIGURE END6912 RF6913 RTJGEAR OPERATORFIGUREEND6922 RF6923 RTJDimensions and WeightsSIZEVALVEmminchDmminchA RF mminchA RTJ mminchBmminchB1mminchCmminchEMminchWEIGHTkgW/HANDWHEEL poundWEIGHTkgW/OPERATOR pound3051230512.0083833.0084133.10158062.2016406545018570228361843880.0194035614336.513.2588935.0089235.10194576.57203080450186502612602778130028664061638715.2499139.0099439.10213584.06222087500207352917753913181540014571843817.24109243.00109543.10238593.90246597----81032----214047185082048919.25119447.00120047.202660104.722740108----90536----259057106102459023.23139755.00140755.403010118.503090122----107042----41589167

SOLID WEDGE VALVES (SLAB GATE)‣ FULL BORE CLASS 900CASTING CARBON STEELPURGING DEVICE: 6” AND LARGERHANDWHEELFIGURE END9912 RF9913 RTJGEAR OPERATORFIGUREEND9922 RF9923 RTJDimensions and WeightsSIZEVALVEmminchDmminchA RF mminchA RTJ mminchBmminchB1mminchCmminchEMminchWEIGHT kgW/HANDWHEEL poundWEIGHT kgW/OPERATOR pound512512.0036814.537114.652520.67----30012158681179120265763763.0038115.038415.163525.00----35014225915534219543010241024.0045718.046018.180031.508803535014230920044124052915261526.0061024.061324.199539.1710754240016330136001323640141120382038.0073729.074029.1125049.211330525002039516780172082018082541025410.0083833.084133.1142056150059500205002010602337112024693051230512.096538.096838.116006316806660024600241280880136029983561432212.68102940.5103840.9166065174069----68027----175038584061637314.69113044.5114044.9189074197078----75030----25905710

CHEMICAL COMPOSITION AND MECHANICAL PROPERTIESELEMENTANDPROPERTIESCARBON STEELASTM A515ASTM A216ASTM A350ASTM A352Gr.70 Gr. WCB Gr. WCC LF2 LCB LCCASTM A182F316STAINLESS STEELASTM A351Gr. CF8ASTM A351Gr. CF8MCARBON 0.35 MAX 0.30 0.25 0.30 0.30 0.25 0.08 MAX 0.08 0.08MANGANESE 0.60-1.05 1.00 1.20 0.60-1.35 1.00 1.20 2.00 MAX 1.50 1.50PHOSPHORUS 0.035 MAX 0.04 0.04 0.04 0.04 0.04 0.045 0.04 0.04SULPHUR 0.040 MAX 0.05 0.05 0.04 0.05 0.05 0.03 0.04 0.04SILICON 0.10-0.35 0.60 0.60 0.15-0.30 0.60 0.60 1.00 MAX 2.00 1.50NICKEL 0.40 MAX 0.50 0.50 0.40 MAX 0.50 0.50 10.00-14.00 8.00-11.00 9.00-12.00CHROME 0.30 MAX 0.50 0.50 0.30 MAX 0.50 0.50 16.00-18.00 18.00-21.00 18.00-21.00MOLYBDENUM 0.12 MAX 0.20 0.20 0.12 MAX 0.20 0.20 2.00-3.00 0.50 2.00-3.00COPPER 0.40 MAX 0.30 0.30 0.40 MAX 0.30 0.30 -- -- --COLUMBIUM 0.02 MAX -- -- 0.02 MAX -- -- -- -- --VANADIUM 0.08 MAX 0.03 0.03 0.05 MAX 0.03 0.03 -- -- --TENSILESTRENGTHPSI MINYIELDSTRENGTHPSI MINELONGATIONIN 2% MIN.REDUCTIONIN AREA %MIN.HARDNESS(HB) MAX.70 00070 00095 00070 00070 00095 00070 000 70 000 75 000 70 000 70 00036 000 36 000 40 000 36 000 35 000 40 000 30 000 30 000 30 00022 22 22 22 24 22 30 35 3030 35 35 30 35 35 -- -- --187 185 185 -- 190 200 -- -- --* The indicated percentage (%) of the elements corresponds to the maximum value, except when rangesare specified.

PRESSURE-TEMPERATURE RATINGSBody, Bonnet MaterialsSteel ASTM A216 WCBTEMPERATUREWORKING PRESSURE PER CLASS, PSIGo Fo C 150 300 600 900 1500-20 TO 100 -29 TO 38 285 740 1480 2220 3705200 93 260 675 1350 2025 3375300 149 230 655 1315 1970 3280400 204 200 635 1270 1900 3170500 260 170 600 1200 1795 2995600 316 140 550 1095 1640 2735650 343 125 535 1075 1610 2685700 371 110 535 1065 1600 2665750 399 95 505 1010 1510 2520800 427 80 410 825 1235 2060850 454 65 270 535 805 1340900 482 50 170 345 515 860950 510 35 105 205 310 5151000 538 20 50 105 155 260For prolonged usage at temperatures above 427 o C (800 o F), consideration should be given to thepossibility of graphite formation in carbon steel.Seat, Wedge MaterialsSteel ASTM A515 Gr.70TEMPERATUREWORKING PRESSURE PER CLASS, PSIGo Fo C 150 300 600 900 1500-20 TO 100 -29 TO 38 285 740 1480 2220 3705200 93 260 675 1350 2025 3375300 149 230 655 1315 1970 3280400 204 200 635 1270 1900 3170500 260 170 600 1200 1795 2995600 316 140 550 1095 1640 2735650 343 125 535 1075 1610 2685700 371 110 535 1065 1600 2665750 399 95 505 1010 1510 2520800 427 80 410 825 1235 2060850 454 65 270 535 805 1340900 482 50 170 345 515 860950 510 35 105 205 310 5151000 538 20 50 105 155 260For prolonged usage at temperatures above 427 o C (800 o F), consideration should be given to thepossibility of graphite formation in carbon steel.Body, Bonnet MaterialsSteel ASTM A352 LCBTEMPERATUREWORKING PRESSURE PER CLASS, PSIGo Fo C 150 300 600 900 1500-20 TO 100 -29 TO 38 285 740 1480 2220 3705200 93 260 675 1350 2025 3375300 149 230 655 1315 1970 3280400 204 200 635 1270 1900 3170500 260 170 600 1200 1795 2995600 316 140 550 1095 1640 2735650 343 125 535 1075 1610 2685700 371 110 535 1065 1600 2665750 399 95 505 1010 1510 2520800 427 80 410 825 1235 2060850 454 65 270 535 805 1340900 482 50 170 345 515 860950 510 35 105 205 310 5151000 538 20 50 105 155 260

SEAT MATERIALSPROPERTIESTEMPERATURE RANGE o FPRESSURE RATINGNYLON-70 - 200900 - 1500PTFEREFORCED-100 - 425-150 - 1500PEEK-25 - 500150 - 1500DELRIN-50 - 180150 - 1500MECHANICALPROPERTYPHYSICALPROPERTYHARDNESS D75 D60 D85 R-120TENSILESTRENGTH(PSI)ELONGATION%SPECIFICGRAVITYWATERABSORPTION%8 000 MIN 4640 MIN 11 000 MIN6600 - 7500MIN250 - 290 240 - 250 650 190 - 2301.04 2.22 - 2.30 1.30 - 1.34 1.40 - 1.420.2 < 0.01 0.18 0.15COLOUR NATURAL WHITE GREY BLACK WHITESEAT MATERIALS (ELASTOMER “O” RING)PROPERTIES VITON BUNA N EPDM AFLASTEMPERATURE RANGE o F -20 TO 400 -15 TO 250 -60 TO 500 +32 TO 500SPECIFIC GRAVITY 1.85 1.31 -- --HARDNESS D75 D90 D90 D79TENSILE STRENGTH -- -- 1960 2680 MIN

NACE SERVICE VALVESThe National Association of Corrosion Engineers (NACE) establishes standards for materials resistant toSulfide Stress Cracking (SSC) to be used in Hydrogen Sulfide (H 2 S) bearing hydrocarbon service.NACE Standard MR-07-75 defines a sulfide stress cracking region based on the relationship of (H 2 S)present to the total operating pressure.This must be considered when specifying valves for service where (H 2 S) is present as proper selection ofmaterials is a customer responsibility.Sulfide stress cracking in materials not suitable for H 2 S service can result in a sudden failure with damageto equipment and harm to personnel.‣ Important considerations when specifying NACE service1. Hydrogen ion concentration (Ph)2. Concentration and total pressure of the hydrogen sulfide (H 2 S)3. Concentration of water, carbon dioxide (CO 2 ) and chlorides4. Service temperatureThe customer can select valves made of alloy/carbon steel material with controlled hardness and/or astainless steel material depending on the severity of the fluid. Valves having a body with a controlledhardness of Rc 22 and studs B7M, nut 2HM, can be combined with a customer selection trim andmanufactured to meet NACE MR-01-75 requirements.

MATERIAL SELECTIONSELECTION CODEA=EXCELLENT B=IT MAY BE USEDC=USE WITH CAUTION D=NO, DONOT USEIRONFOUNDRYALUMINIUM356MATERIALSCARBONSTEELSTAINLESSSTEEL 303STAINLESSSTEEL 316BUNANSEAT ELASTOMERNEOPRENE VITON PTFEACETALDEHYDE C B C A A D D C AACETATE SOLVENTS B A A A A D D D AACETIC ACID (AERATED) D B D A A C C D AACETIC ACID (AIR FREE) D B D A A C C D AACETIC ACID (CRUDE) C B C A A D C D AACETIC ACID (PURE) C B C A A D D D AACETIC ACID (10%) C B C A A D D D AACETIC ACID (80%) C B D B B D D D AACETIC ANHYDRIDE D B A A A C C D AACETONE A A A A A D D D AACETYLENE (DRY ONLY) A A A A A A A A AACRYLONITRILE C B A A A D D C AAIR A A A A A A A A AALCOHOLS METHYL ETHYL B A B A A A A A AALCOHOLS AMYL B A B A A A A A AALCOHOLS BUTYL B A B A A A A A AALUMINIUM CHLORIDE (DRY) B B B A A B B A AALUMINIUM SULFATE (ALUMS) C B C A A A A A AALUMS C B C A A A A A AAMINES A A A A A D D A AAMMONIA ANHYDROUS B B A A A B B C AAMMONIA (ARQUEOUS) A B A A A B B A AAMMONIA SOLUTIONS B D B A A B B A AAMMONIUM BICARBONATE B B C B B B A A AAMMONIUM CARBONATE B B B B B B A B AAMMONIUM CHLORIDE D C D C C B A A AAMMONIUM HYDROXIDE (28%) C C C B B B A A AAMMONIUM HYDROXIDE (CONC.) C C C B C A A A AAMMONIUM MONOPHOSPHATE D B D B B A A A AAMMONIUM NITRATE D B D A A A A A AAMONIUM PHOSPHATE (DIBASIC) D B D B A A A A AAMMONIUM PHOSPHATE (TRIBASIC) D B D B A A A A AAMMONIUM SULFATE C B C B A A A A AAMYL ACETATE C B C B B D D D AANILINE C C C B B C A C AANILINE DYES C C C A C A A B AANTIMONY TRICHLORIDE D D D D D D C A AAPPLE JUICE D B D D B A A A AARSENIC ACID D D D B B A A A AASPHALT EMULSION A C A A A B A A AASPHALT LIQUID A C A A A C A A ABARIUM CARBONATE B B B B B A A A ABARIUM CHLORIDE C D C C C A A A ABARIUM SULFATE B D C B B A A A ABARIUM SULFIDE C D C B B A A A ABEER (ALCOHOL INDUSTRY) C D C B B A A A ABEER (BEVERAGE INDUSTRY) C A C A A A A A ABEET SUGAR LIQUORS B A B A A A ABENZENE (BENZOL) B A B A A A A A ABENEZALDEHYDE B A A A A D D A ABENZOIC ACID D B D A A D A D ABORAX LIQUORS C C C B B A A A ABORIC ACID D B D B B A A A ABRINES C B C B B A A A ABUTADIENE B A D A A C C A ABUTANE B A B A A A B A ACALCIUM BISULFITE D C D C B A A A ACALCIUM CARBONATE D C D B B A A A ACALCIUM CHLORIDE C C C C B A A A A

MATERIAL SELECTIONSELECTION CODEA=EXCELLENT B=IT MAY BE USEDC=USE WITH CAUTION D=NO, DONOT USEIRONFOUNDRYALUMINIUM356MATERIALSCARBONSTEELSTAINLESSSTEEL 303STAINLESSSTEEL 316BUNANSEAT ELASTOMERNEOPRENE VITON PTFECARBINIC ACID D A D B B D D B ACARBON TETRACHLORIDE B B B A A D D B ACASTOR OIL B A B A A A B A ACHLOROFORM (DRY) B D B A D D D B ACHROME ALUM B C B A A A B B ACOCONUT OIL C B C B B A B A ACOPPER ACETATE D C D A A ACOPPER CHLORIDE D C D C C A A A ACOPPER NITRATE D C D B B A A A ACRUDE OIL SWEET B A B A A A B A ACRUDE OIL SOUR C A B A A A B A ACYCLOHEXANE A A A A A C D A ADIACETONE ALCOHOL A A A A A D C ADIESEL FUEL A A A A A A C A ADRILLING MUD B B B A A A A A ADRYING OIL B B B A A C C A AEPSOM SALT C A C B B A A A AETHANE A A A A A A B A AETHER B A A A A C C CEHTYL ACETATE C A B B B D D D AETHYL CHLORIDE B B B A A C C AETHYLENE GLYCOL B A B B B A A A AETHYLENE OXIDE C A B B B D D D AFERRIC NITRATE D D D C C A A A AFERRIC SULFATE D D D B B A A A AFERROUS CHLORIDE D D D D D A A A AFERROUS SULFATE D D D B B A A A AFISH OILS B B B A A A B A AFLUORINE D D D D D CFOOD FLUID AND PASTES C A C A A B B AFORMALDEHYDE (COLD) B A A A A B B AFORMALDEHYDE (HOT) D B D C C B B AFORMIC ACID (COLD) D D D C B D A AFORMIC ACID (HOT) D D D C B D AFREON B B B A A C C C AFUEL OIL B A B A A A B A AGALLIC ACID D A D B B A A AGAS NATURAL B B B A A A A A AGAS ODDORIZERS B A B B B B B A AGASOLINE (LEADED) B A A A A C D A AGASOLINE (UNLEADED) B A A A A C D A AGASOLINE (AVIATION) B A A A A C D A AGASOLINE (MOTOR) B A A A A C D A AGASOLINE (SOUR) B A B A A C D A AGELATIN D A D A A A A A AGLUCOSE B A B A A A A A AGLUE A A A A A A A A AGLYCOLS B A B B B A A AGREASE A A A A A A B A AHEPTANE B A B A A A B A AHEXANE B A B B B A C A AHEXANOL TERTIARY A A A A A AHYDRAULIC OIL PETROLEUM BASE B A A A A A B A AHYDROBROMIC ACID D D D D D C C AHIDRICYANIC ACID D D D D D B C AHYDROFLUORIC ACID C A C A A B AHYDROGEN GAS (COLD) B A B A A B AHYDRIGEN PEROXIDE D A D B B A A A A

MATERIAL SELECTIONSELECTION CODEA=EXCELLENT B=IT MAY BE USEDC=USE WITH CAUTION D=NO, DONOT USEIRONFOUNDRYALUMINIUM356MATERIALSCARBONSTEELSTAINLESSSTEEL 303STAINLESSSTEEL 316BUNANSEAT ELASTOMERNEOPRENE VITON PTFEHYDROGEN SULFIDE B B B B A C A A AHYDROFLUOSILICIC ACID D D D C C A A AHYPO (SODIUM THIOSULFATE) C B D A A A A A AHYPOCHOLORITES SODIUM D C D C C C D A AILUMINATING GAS A A A A A A B A AINK D B D B A A A A AIODINE D D D D D B B A ALODOFORM C C B A A A AISO OCTANE B A A A A A C A AISOPROPYL ALCOHOL B B B B B C C A AISOPROPYL ETHER B A A A A C C AJP-4 FUEL A A A A A A C A AJP-5 FUEL A A A A A A C A AJP-6 FUEL A A A A A A C A AKEROSENE B A B A A A C A AKETCHUP D D D A A A A A AKETONES A A A A A D D D ALACQUERS (AND SOLVENTS) C A C A A D D D ALACTIC ACID (DILUTE COLD) D A D A A B A ALACTIC ACID (DILUTE HOT) D B D B A C C ALARD OIL C A C A A A B A ALEAD ACETATE D D D B B A A A ALINOLEIC ACID B A B A A A B A ALINSEED OIL A A A A A A B A ALIQUEFIED PET GAS (LPG) B A B B B A B A ALUBRICANT OIL A A A A A A B A AMAGNESIUM BISULFATE B B B A A AMAGNESIUM CHLORIDE D D C B B A A A AMAGNESIUM HYDROXIDE B D B A A A A A AMAGNESIUM HYDROXIDE (HOT) B D B A A B A A AMAGNESIUM SULFATE B B B B B A A A AMALEIC ACID D B B B B A A A AMALIC ACID D B B B B A A A AMAYONNAISE D D D A A A A A AMERCURIC CHLORIDE D D D D C A AMERCURIC CYANIDE D D D A A AMERCURY A C A A A A A A AMETHANE B A B B B A B A AMETHYL ACETATE B A B A A D D D AMETHYL ACETONE A A A A A D D D AMETHYLAMINE B A B A A AMETHYL CELLOSOLVE B A B A A AMETHYL CHLORIDE B D B B A C C AMETHYL ETHYL KETONE A A A A A D D D AMETHYL FORMATE C C C B B D B AMETHYLENE CHLORIDE B A B A A D D C AMILK D A D A A A A A AMINE WATERS (ACID) D D D B B A A A AMINERAL OIL B A B A A A B A AMIXED ACIDS (COLD) C C C B A AMOLASSES EDIBLE A A A A A A A A AMOLASSES CRUDE A A A A A A A A AMURIATIC ACID D D D D D B B A AMUSTARD B B B A A A A A ANAPHTHA B A B B B A C A ANAPHTALENE B B A B B S D A ANICKEL AMMONIUM SULFATE D D D A A A ANICKEL CHLORIDE D D D B B A A A A

MATERIAL SELECTIONSELECTION CODEA=EXCELLENT B=IT MAY BE USEDC=USE WITH CAUTION D=NO, DONOT USEIRONFOUNDRYALUMINIUM356MATERIALSCARBONSTEELSTAINLESSSTEEL 303STAINLESSSTEEL 316BUNANSEAT ELASTOMERNEOPRENE VITON PTFENICKEL NITRATE D C D B B A A A ANICKEL SULFATE D D B B B A A A ANOCTINIC ACID B A B A A ANITRIC ACID (10%) D D D A A C B A ANITRIC ACID (30%) D D D A A C C A ANITRIC ACID (80%) D B D A A D D B ANITRIC ACID (100%) A B A A A D D B ANITRIC ACID ANHYDROUS A B A A A D ANITROBENZENE B C B B B D D C ANITROGEN A A A A A A A A ANITROUS ACID (10%) D D D B B C A A ANITROUS GASES C B B A A ANITROUS OXIDE C C B B B B B AOIL ANIMAL A A A A A A B AOIL COTTONSEED C B C B B A B AOIL FISH B B B A A A B AOIL FUEL B A B A A A B A AOIL LUBE A A A A A A B A AOIL MINERAL B A B A A A B A AOIL PETROLEUM (REFINED) B A A A A A B A AOIL PETROLEUM (SOUR) C A B A A A B A AOIL WATER MIXTURES B A B A A A B A AOLEIC ACID B A B A A A C A AOLEUM D B B B B C C C AOLIVE OIL B A A A A A B A AOXALIC ACID D C D B B C A A AOXYGEN B A B A A C C B AOZONE C B C A A APALMITIC ACID C B C B B B B A APALM OIL C A C B B B B A APARAFFIN B A B A A A B A APARAFORMALDEHYDE B B B B B B B A APENTANE B A B A A A B A APERCHLORETHYLENE B A B A A D D A APETROLATUM C B C B B A B A APHENOL B A B A A D D B APHOSPHORIC ACID (10%) COLD D D D B B B A A APHOSPHORIC ACID (10%) HOT D D D D D B A A APHOSPHORIC ACID (50%) COLD D D D B B B B A APHOSPHORIC ACID (50%) HOT D D D D D B B A APHOSPHORIC ACID (80%) COLD B D B A A C B APHOSPHORIC ACID (80%) HOT C D C A A C B APHTHALIC ACID C B C B B C C A APHTHALIC ANHUDRIDE C B C B B C C APIRIC ACID C B C B B C C A APINE OIL B A B A A A C A APINEAPPLE JUICE C A C A A A A A APOTASSIUM BISULFITE D C D B B A A A APOTASSIUM BROMIDE D C D A A A A A APOTASSIUM CARBONATE B C B B B A A A APOTASSIUM CHLORATE B C B B B A A A APOTASSIUM CHLORIDE B B C C C A A A APOTASSIUM CYANIDE B D B B B A A A A

MATERIAL SELECTIONSELECTION CODEA=EXCELLENT B=IT MAY BE USEDC=USE WITH CAUTION D=NO, DONOT USEIRONFOUNDRYALUMINIUM356MATERIALSCARBONSTEELSTAINLESSSTEEL 303STAINLESSSTEEL 316BUNANSEAT ELASTOMERNEOPRENE VITON PTFEPOTASSIUM DICHROMATE B A B A A A A A APOTASSIUM FERRICYANIDE B B B A A A A A APOTASSIUM FERROCYANIDE B A B A A A A A APOTASSIUM HYDROXIDE A D A A A A A APOTASSIUM IODIDE C C C A A A A A APOTASSIUM NITRATE B A B A A A A A APOTASSIUM PERMANGANATE B A B A A A A A APOTASSIUM SUFATE C A B A A A A A APOTASSIUM SULFITE B B B A A A APRODUCER GAS B B B B B A B A APROPANE B A B B B A B A APROPYLENE GLYCOL B A B B B A A A APYROGALIC ACID B B B B B A A A AQUENCH OIL B A B A A A B A ARESSING AND ROSINS C A C A A C C AROAD TAR A A A A A B C A AROOF PITCH A A A A A B C A ARP-1 FUEL A A A A A C A ARUBBER LATEX EMULSIONS B A B A A A ARUBBER SOLVENT A A A A A D C D ASALAD OIL C B C B B A A A ASALIELYLIC ACID D C D A A A A A ASALT C B C B B A A A ASEA WATER D C D A A A A A ASHEALLAC (ORANGE) B A A A A A A ASILVER NITRTE D D D A A C C A ASEAP SOLUTIONS (STEARATES) A C A A A A A A ASOSIUM ACETATE B A B A A B B A ASODIUM ALUMINATE C C C B B A A A ASODIUM BICARBONATE C B C B B A A A ASODIUM BISULFATE (10%) D D D A A A A A ASODIUM BISULFITE (10%) D D D A A A A A ASODIUM BORATE C B C B B A A A ASODIUM BROMIDE (10%) D B C B B A A A ASODIUM CARBONATE A D A A A A A A ASODIUM CHLORATE C B C A A A A A ASODIUM CHLORIDE C B C B B A A A ASODIUM CHOROMATE B D B A A A A A ASODIUM CYANIDE A D A A A A A A ASODIUM FLUORIDE D C D B B A A A ASODIUM HYDROXIDE (COLD) 20% A D A A A A A B ASODIUM HYDROXIDE (HOT) 20% B D B A A B B C ASODIUM HYDROXIDE (COLD) 50% A D A A A A A C ASODIUM HYDROXIDE (HOT) 50% B D B A A B B C ASODIUM HYDROXIDE (COLD) 70% A D A A A C ASODIUM HYDROXIDE (HOT) 70% B D B A A C ASODIUM HYPOCHLORIDE D D D D D D ASODIUM METAPHOSPHATE B A B A A A A ASODIUM METASILICATE (COLD) C B C A A A ASODIUM METASILICATE (HOT) D B D A A ASODIUM NITRATE B A B B B C A A ASODIUM PERBORATE B B B B B C A A ASODIUM PEROXIDE C C C B B C A A A

MATERIAL SELECTIONSELECTION CODEA=EXCELLENT B=IT MAY BE USEDC=USE WITH CAUTION D=NO, DONOT USEIRONFOUNDRYALUMINIUM356MATERIALSCARBONSTEELSTAINLESSSTEEL 303STAINLESSSTEEL 316BUNANSEAT ELASTOMERNEOPRENE VITON PTFESODIUM PHOSPHATE (DIBASIC) B D B A A A A A ASODIUM PHOSPHATE (TRIBASIC) B D B A A B B A ASODIUM SILICATE A B A A A A A A ASODIUM SILICATE (HOT) B C B B B ASODIUM SULFATE B A B A A A A A ASODIUM SULFIDE B C B B B A A A ASODIUM SULFIDE (HOT) C D C B B ASODIUM THIOSULFATE B B B A A A A A ASOYBEAN OIL C B C A A A B A ASTANNIE CHLORIDE D D D D D A A A ASTARCH A A A A A A A A ASTEAM (212 o F) A A A A A C D B ASTEARIC ACID C A C A A A C A ASTODDARD SOLVENT B A B B B A C A ASTYRENE B A A A A D D ASUGAR LIQUIDS A B A A A A A A ASULFATE BLACK LIQUOR C B C B B C C A ASULFATE GREEN LIQUOR C B C B B C C A ASULFATE WHITE LIQUOR C B C B B C C A ASULPHUR C A C B B D ASULPHUR DIOXIDE B A B A A C C A ASULPHUR TRIOXIDE B A B A A C D ASULFURIC ACID (0-7%) D B D C B B A A ASULFURIC ACID (20%) D D D D D C B A ASULFURIC ACID (50%) D D D D D C C A ASULFURIC ACID (100%) B D B A A D D B ASULFUROUS ACID D C D B B C C A ASYNTHESIS GAS B B B B B A B A ATALL OIL B B B B B A B A ATANNIC ACID C C C B B A B A ATAR AND TAR OIL A A A A A B C A ATARTARIC ACID D B D B B C A A ATETRAETHYL LEAD C B C B B ATOLUENE OR TOLUOL A A A A A D D B ATOMATO JUICE C A C A A A A A ATRANSFORMER OIL B A A A A A B A ATRIBUTYL PHOSPHATE A A A A A C C ATRICHLORETHYLENE C A B B B D D B ATUNG OIL B B B A A A B A ATURPENTINE B A B A A B D A AUREA C B C B B AVARNISH A C A A A C A AVEGETABLE OIL EDIBLE B A B A A A B A AVEGETABLE OIL NON EDIBLE B A B A A A B A AVINEAR D C D A A D D D AWATER DISTILLED (AERRATED) D A D A A A A A AWATER FRESH C A C A A A A A AWATER SEA D B D A A A A A AWAX EMULSIONS B A A A A A B A AWAXES A A A A A A B A AWHISKEY AND WINE D D D A A A A A AXYLENE A A A A A D D A AZINC CHLORIDE C D D D D B A A AZINC HYDROSULFITE B D A A A A A A AZINC SULFATE D D D B B A A A A

ACCESSORIESThe Walworth standard cast steel product line includes many different valves designed to meet mostapplications.Special adaptations can be made to meet specific customer requirements. Valves can be supplied withmanual handwheel/gear operation, chain wheel, as well as electric, pneumatic and hydraulic actuators.This makes it possible for Walworth to furnish valves adapted to the customers special needs such ascontrolled opening/closing and remote installation.Valves can also be supplied with a bypass, drain or vent connection, stem extension, position indicators,floor stand mounting as well as a lever and weight system for swing check valves.Gear OperatorsA manual gear operator is designed with a bevel gear and pinion ratio sized to transmit the requiredopening/closing torque with normal operator effort on the hand wheel. They can be supplied aswaterproof units and/or for underground installation with a square operating nut.ActuatorsValves can be furnished with either electric, pneumatic or hydraulic actuators. The actuators can befurnished as either waterproof and/or explosion proof. The customer must specify such things as openclosespeed, maximum differential pressure, service temperature, type of voltage-phase-frequency, air orgar pressure for pneumatic actuators and flow characteristics for hydraulic actuators to be assured ofcorrect performance.

OPERATORS AND ACTUATORSThe Solid Wedge Valves (Slab Gate) are normally supplied with hand wheel and gear operator, but theycan also be equipped with a pneumatic, hydraulic or electric actuator.Whenever the client requires a Solid Wedge Valve (Slab Gate) equipped with an actuator, the followinginformation should be submitted.1. Valve size and rating (ANSI).a. If the actuator is required to perform a field exchange, describe the type of actuatorinstalled on the valve.2. Type of actuator:a. Hydraulicb. Pneumaticc. Electric3. Maximum differential pressure during operation4. Operation speed (minutes and seconds)a. To openb. To close5. Operating frequency6. For an electric actuator specify:a. Voltage AC or DCb. One phase or three phasesc. Type of motor6.1 Explosion safe6.2 Weather protection (waterproof)6.3 Other7. For a hydraulic or pneumatic actuator specify:a. Minimum and maximum available pressureb. Operating media-Gas-Air-Fluid (specify type)c. Accessories-Filter-Pump-Control valve-Electric operation-Manual operation-Pilot operation8. Position indicator (the valve is supplied with a visual position indicator)-Remote control type.

API Standards – American Petroleum InstituteAPPLICABLE STANDARDS AND CODESAPI 598API-6DAPI-6FAAPI-607Valve inspection and testingPipeline valves (gate, plug, ball and check valves)Specification for fire test for valvesFire test for soft seated quarter turn valvesASME – ASME International (American Society of Mechanical Engineers)ANSI B1.20.1ANSI B16.5ANSI B16.10ANSI B16.25ANSI B16.34Pipe threads general purpose.Pipeline flanges and flanged fittings.Valve dimension, face to face and end to end.Butt welding endsValves-flanged, threaded and welding endMSS Standards – Manufacturers StandardizationMSS SP-6MSS SP-9MSS SP-25MSS SP-44MSS SP-55MSS SP-61Standard finishes for contact faces of pipe flanges and connecting-end flanges of valvesand fittings.Spot facing for bronze, iron and steel flanges.Standard marking system for valves, fittings, flanges and unions.Steel pipe line flangesQuality standard for steel castings for valves, flanges and fittings and other pipingcomponents – Visual method for the evaluation of surface irregularities.Pressure testing of steel valves.ASTM Standards – American Society for Testing and MaterialsASTM A-105ASTM A-182ASTM A-193ASTM A-194ASTM A-216ASTM A-276ASTM A-320ASTM A-350ASTM A-351ASTM A-352ASTM A-515Standard specification for carbon steel forgings for piping applications.Standard specification for forged or rolled alloy steel pipe flanges, forged fittings andvalves and parts for high temperature service.Standard specification for alloy-steel and stainless steel bolting materials for hightemperature service.Standard specification for carbon and alloy steel nuts for bolts for high-pressure andhigh-temperature service.Standard specification for steel castings, carbon, suitable for fusion welding, for hightemperatureservice.Standard specification for stainless and heat-resisting steel bars and shapes.Standard specification for alloy steel bolting materials for low temperature service.Standard specification for carbon and low alloy steel forgings, requiring notchtoughness testing for piping components.Standard specification for castings, austenitic, austenitic-ferritic (duplex), for pressurecontainingparts.Standard specification for steel castings, ferritic and martensitic, for pressure-containingparts, suitable for low temperature service.Standard specification for pressure vessel plates, carbon steel, for intermediate-andhigher-temperatureservice.NACE Standards – NACE (National Association of Corrosion Engineers)NACE MR0175 Standard material requirements sulfide stress cracking resistant metallic materials foroilfield equipment.ANSI/ASME B31.1ANSI/ASME B31.2ASME/ANSI B31.3Power pipingFuel gas pipingProcess pipingBoiler and Pressure Vessel Code:SECTION II Part A – Ferrous material specifications.SECTION II Part B – Non ferrous material specifications.SECTION II Part C – Specifications for welding rods, electrodes and filler metals specifications.SECTION V Non-destructive examination.SECTION VIII Rules for construction of pressure vessels, divisions 1 and 2.SECTION IX Welding and brazing qualifications.

TERMS AND CONDITIONSAcceptance: All quotations for acceptance within 45 days from date of quotation unless extended inwriting. In the event a purchase order is placed after this period of time, The Walworth Company reservesthe right to requote base prices of all valves offered. All orders and contracts are subject to credit approvaland acceptance by The Walworth Company.Freight: When prices are F.B.O. point of shipment- no freight allowance, Walworth will attempt to routeshipments in the method which will result in the lowest cost unless otherwise instructed. All shipmentswill be freight charges collect except when stipulated on the purchase order in which case the buyer willbe invoiced for all transportation charges.Delivery of material to a common carrier shall be considered to be delivery to Buyer andshall be at Buyer's risk thereafter.The Buyer shall file claims of loss of or damage to material in transit directly with the carrier.Prices: There will be added to all prices quoted, any sales, use, occupation, excise or similar tax whichSeller may be required to pay or collect in connection with the sale. Seller reserves the right to cancel anyorder in the event that selling price(s) shall be established by Federal, State or other governmentregulation with respect to the product(s) covered by the order which shall be lower than the price(s)specified in the order.Escalation Terms: Price shown in the price schedule reflects the cost in effect at the time of publication.These prices will remain firm on all products with a quoted delivery of twentysix (26) weeks or less.On products which have a schedule delivery of more than twenty-six (26) weeks the goods will beinvoiced.Based on the applicable price sheet in effect at the time of shipment. In no event will the invoiced price beless than the price originally quoted.Purchased Components: (i.e. motors, gearing, etc.) Prices are quoted on supplier price in effect at timeof quotation. Actual invoice price may be adjusted in accordance with the supplier's escalation policy.Deferred Shipments: If for any reason the customer desires to delay shipments more than 30 days aftermanufacturing complete or to place a hold or stop to the order during the manufacturing cycle. TheWalworth Company reserves the right to consider the order cancelled and to invoke cancellation chargesper the schedule below.Cancellation: After order acceptance by Walworth, items or complete orders may be cancelled and buyerwill be charged for work performed, based on the following schedule:Five (5%) percent of price of stock items.Ten (10%) percent of price of stock items ordered in quantities which exceed normal inventory levels.Five (5%) percent of price prior to drawing submittal on made to order items.Fifteen (15%) percent drawing approval, but prior to the start of castings.Thirty (30%) to Fifty (50%) percent during casting cycle, depending on the state of completion.Fifty-five (55%) to Seventy-five (75%) during machining and assembly operations, depending on thestate of completion.One hundred (100%) percent after final assembly and test.Remittances: Remittances must be made to the address indicated on the invoice.Credit Terms: As quote. Invoices on balances overdue will be subject to a service charge of One and ahalf (11/2 %) percent per month on such indebtedness.Deliveries: Shipments and deliveries shall at all times be subject to the approval of Seller's CreditDepartment. If the Buyer shall fall to make any payments according to the terms of the contract, Sellermay in addition to and not in limitation of its other rights and remedies, at its option, cancel all or any partof Buyer's incomplete contracts with Seller or may defer shipments or deliveries under Buyer's contractswith Seller except upon receipt of satisfactory security or for cash before shipment.All schedules of shipment are estimated as closely as possible and Seller will use its best efforts to shipwithin the time scheduled, but does not guarantee to do so. Schedules commence with the date Sellerreceives authorization to proceed with the order, subject to the provisions of the next sentence. The orderwill not be released for manufacture until complete specifications and approved drawings (if drawingsapproval is required) are received at the plant of manufacture and the estimated schedule of shipment willcommence with the date of such receipt.

Seller shall not be liable for any direct, indirect or consequential damage or loss caused by any delay indelivery, regardless of the cause of delay. Without limiting the generality of the foregoing, Seller assumesno responsibility for delays in delivery resulting from fire, flood, accidents riots, strikes, transportationdelays, labor or material shortages, existing or future laws, acts of any governmental authority, or anyother cause beyond Seller's control. Items offered from stock are subject to prior sale.Inspection: Final inspection and acceptance of products must be made at the plant facility, unlessotherwise provided in the order and/or in agreed upon specifications. Prices do not include charges forspecial tests or inspections performed at the request of the Buyer, unless called for in the order and/or inagree upon specifications.Returns: Permission in writing and return tagging instructions must be obtained from Seller before anygoods returned for credit or adjustment will be accepted. Where returned goods are accepted, a minimumcharge of Twenty five percent (25%) of the invoice price will be made, plus freight from both directionsand costs of reconditioning the material for resale as new.Warranty: Seller will replace without charge or refund the purchase price of products manufactured bySeller which prove to be defective in material or workmanship, provided in each case that the product isproperly installed and is used in the service for which the Seller recommends it and that written claim,specifying the alleged defect, is presented to Seller within one year from date of shipment. Seller shall inno event be responsible for (a) claims for labor, expenses or other damages occasioned by defectiveproducts or (b) for consequential or secondary damages. THE WARRANTY STATED IN THISPARAGRAPH IS IN LIEU OF ALL OTHER WARRANTIES EITHER EXPRESSED ORIMPLIED. WITH RESPECT TO WARRANTIES THIS PARAGRAPH STATES BUYER'SEXCLUSIVE REMEDY AND SELLER'S EXCLUSIVE LIABILITY.Design, etc.: Seller reserves the right to change design, materials or specifications without notice. Therewill be a charge for modifying an order after it has been entered when such change or modification resultsin additional engineering or clerical work for either The Walworth Company or our suppliers.Minimum Charge: Orders totaling less that $100.00 (one hundred 00/100 U.S. CY) net will be billed ata minimum charge of $50.00 (fifty 00/100 U.S. CY)Note: We reserve the right to correct obvious clerical errors in quotations, invoices and other contracts.