| 摘要 |
<p>An outer threaded type ball valve having no bonnet for controlling high-pressure fluid and formed of carbon steel, 3 1/2 nickel steel or stainless stell. A yoke (19) is threaded directly to a body (1), and a packing chamber (7) is provided at the body (1). A reverse seat (18) formed at a column with a collar is threaded to the lower portion of the chamber (7), and a valve body (16) and a valve body guide hole (9) sliding in contact with the body (16) are provided at the lower portion of the seat (18). The diameters of a valve seat (10), an inlet guide hole (12) and an outlet guide hole (13) are made smaller than that of a connection tube, each of holes (12) and (13) having intermediate throttles (14), (15). This ball valve is adapted for a petrochemical equipment for controlling high-pressure fluid.</p> |
