| 摘要 |
<p>The invention pertains to a fitting for tubes (30) wherein a flat face fitting having a sealing face perpendicular to the fitting axis may be sealed to a metallic tube (30) without modification to the tube (30). An annular ferrule (34) mounted upon the tube (30) includes a head (38) having a flat radial surface (40) for engaging the fitting seal face, and the ferrule (34) includes an annular deformable sleeve portion (44) having internal serrations (52) deformed into a metal-to-metal sealing relationship with the tube (30) by a compression nut (36) threaded upon the fitting body (10). The ferrule (34) and nut (36) include abutment surfaces (56, 58) which engage to limit nut (36) tightening preventing over-stressing of the ferrule (34) and fitting components.</p> |
