Top entry low temperature ball valve

Abstract

The invention discloses a low temperature ball valve, in particular to a top entry low temperature ball valve. The top entry low temperature ball valve comprises a valve body, a sphere, a valve rod and an actuator, wherein the valve body is provided with an inlet and an outlet, a cavity is formed inside the valve body, the sphere is arranged in the cavity of the valve body, the upper portion of the valve body is fixedly connected with a valve deck through a bolt, one end of the valve rod is connected with the sphere, the other end of the valve rod is connected with the actuator, the actuator drives the sphere to rotate through the valve rod so that the ball valve can be opened or closed, an inlet valve seat is arranged between the inlet of the valve body and the sphere, a single-lip-type seal ring is arranged on the left side of the inlet valve seat, an outlet valve seat is arranged between the outlet of the valve body and the sphere, and a double-lip-type seal ring is arranged on the right side of the outlet valve seat. According to the top entry low temperature ball valve, the unique design of the inlet valve seat and the outlet valve seat is adopted, and the properties of the lip-type seal rings are utilized so that the sealing performance of the top entry low temperature ball valve can be extremely improved; meanwhile, the service life of the valve can also be prolonged.

Description

technical field [0001] The invention relates to a cryogenic ball valve, in particular to a top entry cryogenic ball valve. Background technique [0002] Top-entry ball valves have been widely recognized by customers because they can be maintained online in pipeline valves. In the low-temperature field, top-entry ball valves have also been recognized by customers. The sealing reliability with the disc is greatly reduced, which is prone to safety hazards. Contents of the invention [0003] The invention overcomes the deficiencies in the prior art, and the technical problem to be solved is to provide a top entry cryogenic ball valve with reasonable design, simple structure and good sealing performance. [0004] In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: a top-loading low-temperature ball valve, including a valve body, a ball, a valve stem and an actuator, the valve body has an inlet and an outlet, and...

AI Technical Summary

Problems solved by technology

[0002] Top-entry ball valves have been widely recognized by customers because they can be maintained online in pipeline valves. The sealing reliability with the disc is greatly reduced, which is prone to safety hazards

Images