Structure Description:Equivalent to AES M01,John crane Type 9 sealMultiple spring , Unbalanced sealOperating Limits:Temperature:-40---250℃ Speed: 15m/sPressure: 25barStandard size: 0.5"--4"Materials: Seal ring: Car,Sic,Ssic,TC,CeramicSecondary seal: NBR,EPDM,Viton, etc.Spring and metal parts:304,316,HAST.C