{"id":9878,"date":"2026-05-28T06:31:14","date_gmt":"2026-05-28T06:31:14","guid":{"rendered":"https:\/\/ntgdvalve.com\/?p=9878"},"modified":"2026-05-28T06:31:47","modified_gmt":"2026-05-28T06:31:47","slug":"globe-valve-pressure-drop-cv","status":"publish","type":"post","link":"https:\/\/ntgdvalve.com\/pt\/globe-valve-pressure-drop-cv\/","title":{"rendered":"Queda de press\u00e3o e Cv. da v\u00e1lvula globo Por que a resist\u00eancia ao fluxo \u00e9 importante na sele\u00e7\u00e3o de v\u00e1lvulas"},"content":{"rendered":"

Author Name:<\/strong> Bruce Zheng<\/p>\n

Author Role:<\/strong> Co-Founder and Valve Engineer at NTGD Valve<\/p>\n

Author Bio:<\/strong> Bruce Zheng is Co-Founder and Valve Engineer at NTGD Valve, focusing on industrial valve selection, application, and technical content for global B2B buyers.<\/p>\n

Last Updated:<\/strong> May 27, 2026<\/p>\n

Globe valve pressure drop is one of the most important selection factors when a valve is used for throttling, flow regulation, or any service where system pressure loss matters. A globe valve does not provide a straight-through flow path like many gate or full-bore ball valves. Its internal body geometry, disc-seat restriction, and flow direction changes create resistance, and that resistance appears in the piping system as pressure drop or pressure loss.<\/p>\n

Cv, or flow coefficient, is closely connected to this topic. In simple terms, Cv describes how much flow a valve can pass under a defined pressure drop condition. A higher Cv generally means the valve can pass more flow under comparable conditions, while a lower Cv usually indicates greater restriction. For globe valves, Cv is especially important because the same nominal valve size can have different flow capacity depending on body pattern, trim design, port opening, seat geometry, and manufacturer design.<\/p>\n

For early selection, formulas and Cv tables can help engineers understand the relationship between flow rate, pressure drop, and fluid properties. But they should not replace manufacturer-confirmed datasheet values. In real projects, globe valve pressure drop should be reviewed together with flow rate, fluid properties, inlet and outlet pressure, allowable pressure loss, body pattern, trim design, and required shutoff performance. If pressure drop and Cv are not matched to the actual service, the result may be insufficient pump head, unstable throttling control, unexpected downstream flow loss, or an RFQ that cannot be checked accurately.<\/p>\n

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