| 摘要 |
<p>A measurement coupling with two end connections and a check valve which opens and closes a through bore of the measurement coupling in a controlled manner. The measurement coupling being constructed in two portions both of metal. The two portions be detachably connected to one another in such a way that they contact one another in a metal-to-metal relationship. A seal member being disposed between the two portions. The metal-to-metal seal prevents overloading of the seal member.</p> |
