... for installation and maintenance of pipes. 2.Main composition of AY-Type: No.NameQtyMaterial1Gland2Q235A,QT400~152Sleeve1Q235A,20#3Seal ring2NBR,CR,EPDM4BoltnQ235A ... ,35#5NutnQ235A,20# 3.Basic size of AY-Type: 4.about us: We have received great reputation either ... a couple of years.As shown clearly in the picture,AY Loose Compensation Joint can link with the flange on one ...