{"id":10593,"date":"2026-07-06T05:15:11","date_gmt":"2026-07-06T05:15:11","guid":{"rendered":"https:\/\/ntgdvalve.com\/?p=10593"},"modified":"2026-07-06T05:56:47","modified_gmt":"2026-07-06T05:56:47","slug":"check-valve-pressure-drop-cv","status":"publish","type":"post","link":"https:\/\/ntgdvalve.com\/ru\/check-valve-pressure-drop-cv\/","title":{"rendered":"\u041f\u0435\u0440\u0435\u043f\u0430\u0434 \u0434\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0432 \u043e\u0431\u0440\u0430\u0442\u043d\u043e\u043c \u043a\u043b\u0430\u043f\u0430\u043d\u0435 \u0438 \u043a\u043e\u044d\u0444\u0444\u0438\u0446\u0438\u0435\u043d\u0442 Cv: \u043a\u0430\u043a \u0441\u043e\u043f\u0440\u043e\u0442\u0438\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u043e\u0442\u043e\u043a\u0443 \u0432\u043b\u0438\u044f\u0435\u0442 \u043d\u0430 \u0432\u044b\u0431\u043e\u0440"},"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> July 5, 2026<\/p>\n

Check valve pressure drop is the pressure difference or energy loss created when fluid passes through a check valve. It is not determined by line size alone. It depends on flow rate, valve design, internal flow path, disc or plate position, medium properties, Cv value, and whether the valve is fully open under real operating conditions.<\/p>\n

For industrial piping systems, pressure drop is not only a calculation item. It affects pump head, energy use, stable valve opening, water hammer risk, and final check valve selection. A valve with low catalog pressure drop can still perform poorly in service if the operating flow is too low to hold the valve open, if the cracking pressure is not suitable, or if the valve is installed in disturbed flow.<\/p>\n

The practical selection point is simple: pressure drop should be low enough for the system, but the valve must also open stably, close reliably, and match the real operating condition. Final sizing should be checked against the manufacturer\u2019s pressure drop curve, Cv table, head loss chart, or project-specific datasheet.<\/p>\n

The article below explains how to separate pressure drop, Cv, head loss, cracking pressure, and type-specific check valve behavior before sending an RFQ or approving a valve for service.<\/p>\n

\"Check
Check valve pressure drop should be reviewed with Cv, head loss, valve type, and stable opening.<\/figcaption><\/figure>\n
\n
\n

Table of Contents<\/p>\nToggle<\/span><\/path><\/svg><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n