FULLY LINED VALVES FOR SULFURIC ACID   PDFs/CHEMVALVE FULLY FULLY LINED VALVES FOR SULFURIC ACID SERVICES Applicaon Descripon : The use of concentrated sulfuric acid for pH page 1

FULLY LINED VALVES FOR SULFURIC ACID PDFs/CHEMVALVE FULLY FULLY LINED VALVES FOR SULFURIC ACID SERVICES Applicaon Descripon : The use of concentrated sulfuric acid for pH

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  • FULLYLINEDVALVESFORSULFURICACIDSERVICES

    Applica5onDescrip5on:TheuseofconcentratedsulfuricacidforpHcontrolinwaterandwastewatertreatment,agriculture,bioenergyandchemicalprocessesiso:enthebestchoiceduetothereadyavailability,lowcostandeffec=venessofthisacid.Forexample,inthepulpandpaperindustry,thesulfuricacidisusedtoadjustthepHofthechlorinedioxidebeinggeneratedforthebleachtowers.Handlingandinjec=onoftheacidrequiressomespecialconsidera=onsforallvalvescurrentlybeingusedintheconcentratedsulfuricacidinjec=onsystems.

    IssueswithApplica5on: Lackof=ghtshutofffromthecheck

    valves.Sulfuricacidhasagreataffinityforwater.Itwilldrawthroughthecheckvalvethewater(orprocessfluid)fromthemixingteesideifthereisnotenoughseatloadtoassure=ghtshutoffofthecheckvalve.

    Controlvalvesbeingusedarenotprovidingthebestrangeofcontrolforthisdifficultapplica=on.

    ChemValveSolu5ons: ChemValverecommendsourmodel880SHCfullylinedballcheckvalve

    withahighratespringthatrequires10psiofdifferen=alpressureacrossthecheckvalve,inthenormalflowdirec=on,tocracktheballofftheseat.Thisinsuresthatwhenthecheckvalveintheclosedposi=on,itwillhaveadequateseatloadtopreventthemigra=onofwaterbackintothesulfuricacid.ChemValvealsorecommendsourPFAlinermaterialfortheconcentratedsulfuricacidvalvesduetothepossibleheatbuildupfromthisapplica=on.

    Inchlorinedioxideservice,ChemValverecommendsthatthespringforthecheckvalvesbemadeof=tanium.HastelloyChascannotstandupover=meinthechlorinedioxideservice.ChemValvealsorecommendsthePVDF(Kynar)linermaterialforthedilutesulfuricacidserviceiftheprocessfluidischlorinedioxidetoleachingthroughtheliner.

    Controlvalvesusedintheseapplica=onswillnormallyrequirealargerangeabilityvalve.ChemValvecanhandlethiswithourModel790EB150withourVPortseatdesign.

    MODEL880SHC MODEL790EBVPORTSEAT