Multiple spring design. Unbalanced seal. Operating Limits: Temperature:-20——180 Speed: 15m/s. Pressure: 12bar. Standard size: 0.5”-4.0” The Common Materials: Seal ring: Car, Sic, Ssic, TC Secondary seal: NBR,，EPDM,Viton etc. Spring and metal parts: 304,316.,HAST.C Asinoseal also offer mechanical seals’ stocks for John Crane 8-1, 8B1, 8B1T, 58B, 58U, 1(US) 1A,1B, 2(US), 2100, 502, 10R&10T, WB2, 9, 9B, 9T, 9BT, 59B, 59U.