... ,machanical oil seal .Oil seals have been in much use as a sealing device for every kind of machinery of equipmentconcernwd ... , HNBR, XNBR, POLYCRYLIC, SILICON, VITON, EPDM. . . etc 2. Specification: Meet AS-568, JIS-B-2401P & G, DIN, BS1806/4518, SMS1588 and none ...