b'ASG SERIESA S G S E R I E SLAPPED BODY/DISC SEATS (METAL TO METAL) RESILIENT SEAT DESIGNAPI598metalseatallowsaleakageof3cc/inchofbore/minute. IncreasedseatlifeisensuredbyeliminatingtheproblemoftheheelTheSupercheckdisc&seatfacesaremachinedtoobtain ofplatesdraggingontheseatduringopening.Thesoftseatisheat50~66%lowerleakagethanAPI598allows. bondedandmouldedintoarecessedbodygroove.SuperchecksoftHEAT BONDED RESILIENT SEAT seatedvalvesareleaktightshutoff.Thediscfloatsontheseatlipandalsomakesmetaltometalseatcontact,providingametalseatbackup.Open ClosedEND TYPESRaised Face (serrated) Ring Joint Plain FaceWAFER CHECK VALVE STANDARD APV ALLOWABLE LEAKAGE RATES FOR CLOSURE (SEAT) TESTS API 598VALVE SIZE METAL SEATED WAFER CHECK VALVES SOFT SEATED WAFER CHECK VALVESLIQUID TEST (cc/min) GAS TEST (bubbles/min) LIQUID TEST (cc/min) GAS TEST a (bubbles/min)NB NPSAPV API 598 API 598 APV API 598 APV a API 59850 2 3 6 NotrequiredperAPI598d 0c Notspecifiedc 2b NotrequiredperAPI598d65 2.5 3.75 7.5 NotrequiredperAPI598d 0c Notspecifiedc 2b NotrequiredperAPI598d80 3 4.0 9 NotrequiredperAPI598d 0c Notspecifiedc 2b NotrequiredperAPI598d100 4 6.0 12 NotrequiredperAPI598d 0c Notspecifiedc 2b NotrequiredperAPI598d125 5 7.5 15 NotrequiredperAPI598d 0c Notspecifiedc 2b NotrequiredperAPI598d150 6 9.0 18 NotrequiredperAPI598d 0c Notspecifiedc 2b NotrequiredperAPI598d200 8 12.0 24 NotrequiredperAPI598d 0c Notspecifiedc 2b NotrequiredperAPI598d250 10 15.0 30 NotrequiredperAPI598d 0c Notspecifiedc 3b NotrequiredperAPI598d300 12 18.0 36 NotrequiredperAPI598d 0c Notspecifiedc 3b NotrequiredperAPI598d350 14 21.0 42 NotrequiredperAPI598d 0c Notspecifiedc 4b NotrequiredperAPI598d400 16 24.0 48 NotrequiredperAPI598d 0c Notspecifiedc 4b NotrequiredperAPI598d450 18 27.0 54 NotrequiredperAPI598d 0c Notspecifiedc 5b NotrequiredperAPI598d500 20 30.0 60 NotrequiredperAPI598d 0c Notspecifiedc 6b NotrequiredperAPI598d600 24 36.0 72 NotrequiredperAPI598d 0c Notspecifiedc 7b NotrequiredperAPI598da GastestnotperformedasstandardoncastironbodyvalvesandisnotrequiredasperAPI598.API598doesnotrequiregastestonsteelvalvesbutAPVperformsitb 5.5barminimumtestpressure.(Highertestpressuremayberequiredtoenergiseresilientseatinhighpressureclasses/largersizes).c SinceAPI598doesnotspecifyaleakagerateforresilientseatedcheckvalves,manymanufacturersusethemetalseatedcheckvalveleakagerate.However,APVdemandsasclose aspossibletotightshutoffasperAPI598resilientseated(ISO5208-A)Noteinhigherclassesinsmallersizesandallclassesinlargersizes,3upto10waterdripsaminuteisaccepted.d Forcheckvalves,gastestisnotrequiredasperAPI598,butAPVdoesperformit.1cc = 16 drops, 1ml = 16 drops8 SUPERCHECK - Check Valves - Wafer Style'