| 摘要 |
A control valve with balanced plug for fluid flow control having a cylindrical guide barrel provided with discharge ports, and a coaxial plug which slides in the plug. The plug is balanced through bores which cause the pressure to be the same on opposing faces of the plug and upstream and downstream of the plug. The plug is rigidly connected by a control lever to an operating stem of the valve, in such a manner that the plug and the stem move rigidly in the same direction along non-coinciding parallel axes. The lever is resilient to compensate for errors of parallelism between the operating stem and the barrel caused by constructional defects or severe operating conditions. Preferably the lever is of the gooseneck type to limit weight and overall size, and the neck of the valve body is of elliptical cross-section. The valve is of the universal type, and operates independently of the direction in which the fluid flows.
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