Globe valve

The globe valve's S-shaped flow path with a curved inner surface and flow straightening partition addresses fluid flow bias and capacity coefficient decrease, enhancing flow rate and reliability by guiding fluid towards the inlet and preventing cavitation.

JP7863993B2Active Publication Date: 2026-05-22AZBIL CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
AZBIL CORP
Filing Date
2022-03-18
Publication Date
2026-05-22

AI Technical Summary

Technical Problem

Existing globe valves suffer from fluid flow bias towards the outlet side and a decrease in capacity coefficient due to the use of plate materials to partition separate flow paths.

Method used

The globe valve features an S-shaped flow path with a seat ring and valve element that includes an intermediate passage, a primary passage, and a secondary passage, where the inner surface of the first end of the intermediate passage is curved to guide fluid flow away from the outlet, and a flow straightening partition is provided to direct fluid towards the inlet.

Benefits of technology

This design reduces fluid flow bias towards the outlet, maintains a higher flow rate, and minimizes the decrease in capacity coefficient, while preventing cavitation and interference, all achieved through modifications to the valve body shape.

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Patent Text Reader

Abstract

To reduce both of deviation of a main flow of a fluid and a decrease in a capacity coefficient.SOLUTION: A globe valve 10 is equipped with a valve body 11, a seat ring 15 that is installed in the middle of an S-shaped channel R inside the valve body 11, and a valve element 12 that abuts on the seat ring 15 to open / close the S-shaped channel R. The channel R is equipped with an intermediate channel R10, a primary channel R20 that reaches from an inflow port E1 to a lower end portion R11 on a valve bottom 11F side of the valve body 11 of the intermediate channel R10, and a secondary channel R30 that reaches from an upper end portion R12 of the intermediate channel R10 to an outflow port E2 and stores the valve element 12. At least a part on the inflow port E1 side on an inner surface of the lower end portion R11 of the intermediate channel R10 curves so as to gradually separate from a center axis C of the intermediate channel R10 from an upper end portion E1 side toward the valve bottom 11F side and so as to bulge to the center axis C side and the valve bottom 11 F side of the intermediate channel R10.SELECTED DRAWING: Figure 1
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