Engineering glossary of industrial valve terminology including pressure classes, Cv values, sealing standards, face-to-face dimensions, torque, flow coefficients, and performance classifications.
What Is Pressure Drop Across a Valve? Direct Answer Pressure drop across a valve is the difference in fluid pressure measured between the upstream and downstream sides of the valve during flow. It …
Read ArticleWhat Is Valve Torque? Direct Answer Valve torque is the rotational force required to open, close, or modulate a valve under specified operating conditions. It is typically expressed in Newton-meter…
Read ArticleWhat Is a Valve Actuator? Direct Answer A valve actuator is a mechanical device that converts energy — such as pneumatic, electric, or hydraulic power — into motion to open, close, or modulate a va…
Read ArticleWhat Is Control Valve Rangeability? Direct Answer Control valve rangeability is the ratio between the maximum controllable flow and the minimum controllable flow a valve can regulate while maintain…
Read ArticleWhat Is Flow Coefficient in Valve Engineering? Direct Answer Flow coefficient is a quantitative parameter that expresses the flow capacity of a valve or flow-restricting device under specified cond…
Read ArticleWhat Is Cv Value in Valve Engineering? Direct Answer Cv value (flow coefficient) is a numerical parameter that quantifies a valve’s flow capacity. It is defined as the number of U.S. gallons …
Read ArticleWhat Is Double Block and Bleed (DBB) in Valve Systems? Direct Answer Double block and bleed (DBB) is a valve arrangement or valve design that provides two independent sealing surfaces (blocks) in s…
Read ArticleWhat Is a Trunnion Mounted Ball Valve? Direct Answer A trunnion mounted ball valve is a quarter-turn valve in which the ball is mechanically anchored by upper and lower trunnions, allowing it to ro…
Read ArticleWhat Is the Difference Between Full Port and Reduced Port Valves? Direct Answer Full port valves have an internal bore diameter equal to the nominal pipe size, allowing unrestricted flow through th…
Read ArticleWhat Is the Difference Between NPT and BSP Threads? Direct Answer NPT (National Pipe Taper) and BSP (British Standard Pipe) are two distinct pipe thread standards used for threaded pipe and valve c…
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