As-r7n, to replace burgmann m7n seal. Wave spring design. Multiple spring design is also available! Pump screw design could be made for spring retainer. Operating limits: Temperature:-20¡ª¡ª180 Speed: 15m/s. Pressure: 12bar. Standard size: 14-100mm 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 burgmann bt-fn, m3n, m37/m37g, hj92n, h7n, m74-d, h74-d, eagle 1527, ea560(a), mg1/12/13/s20.