fully lined valves for sulfuric acid serviceschemvalve.com/images/replacement pdfs/chemvalve...
TRANSCRIPT
![Page 1: FULLY LINED VALVES FOR SULFURIC ACID SERVICESchemvalve.com/images/Replacement PDFs/CHEMVALVE FULLY... · 2014. 6. 13. · ACID SERVICES Applicaon Descripon : The use of concentrated](https://reader035.vdocuments.net/reader035/viewer/2022071405/60fafd7069d2bb419b5923a4/html5/thumbnails/1.jpg)
FULLYLINEDVALVESFORSULFURICACIDSERVICES
Applica5onDescrip5on:TheuseofconcentratedsulfuricacidforpHcontrolinwaterandwastewatertreatment,agriculture,bio‐energyandchemicalprocessesiso:enthebestchoiceduetothereadyavailability,lowcostandeffec=venessofthisacid.Forexample,inthepulpandpaperindustry,thesulfuricacidisusedtoadjustthepHofthechlorinedioxidebeinggeneratedforthebleachtowers.Handlingandinjec=onoftheacidrequiressomespecialconsidera=onsforallvalvescurrentlybeingusedintheconcentratedsulfuricacidinjec=onsystems.
IssueswithApplica5on:• Lackof=ghtshutofffromthecheck
valves.Sulfuricacidhasagreataffinityforwater.Itwill“drawthrough”thecheckvalvethewater(orprocessfluid)fromthemixingteesideifthereisnotenough“seatload”toassure=ghtshutoffofthecheckvalve.
• Controlvalvesbeingusedarenotprovidingthebestrangeofcontrolforthisdifficultapplica=on.
ChemValveSolu5ons:• ChemValverecommendsourmodel880SHCfullylinedballcheckvalve
withahighratespringthatrequires10psiofdifferen=alpressureacrossthecheckvalve,inthenormal“flow”direc=on,tocracktheballofftheseat.Thisinsuresthatwhenthecheckvalveintheclosedposi=on,itwillhaveadequate“seatload”topreventthemigra=onofwaterbackintothesulfuricacid.ChemValvealsorecommendsourPFAlinermaterialfortheconcentratedsulfuricacidvalvesduetothepossibleheatbuildupfromthisapplica=on.
• Inchlorinedioxideservice,ChemValverecommendsthatthespringforthecheckvalvesbemadeof=tanium.HastelloyChascannotstandupover=meinthechlorinedioxideservice.ChemValvealsorecommendsthePVDF(Kynar)linermaterialforthedilutesulfuricacidserviceiftheprocessfluidischlorinedioxidetoleachingthroughtheliner.
• Controlvalvesusedintheseapplica=onswillnormallyrequirealargerangeabilityvalve.ChemValvecanhandlethiswithourModel790EB‐150withourV‐Portseatdesign.
MODEL880SHC MODEL790EBV‐PORTSEAT