Valve Sizing and Calculation Resources
Use Tangovalve's Cv calculator for liquid, gas and steam to prepare sizing data before sending your valve inquiry.
Control Valve Rangeability: Formula, Installed Limits and Turndown
Control valve rangeability is the ratio of the maximum controllable flow to the minimum controllable flow under stated test conditions. Both endp...
Control Valve Authority: Formula, Calculation and Sizing Meaning
Control valve authority is the share of the pressure drop in a defined circuit that falls across the fully open control valve at a stated flow co...
07 Jul
Pneumatic Actuator Sizing Guide for Valves
A pneumatic actuator is sized from the valve load first: break torque for a quarter-turn valve, stem thrust for a linear valve, and the lowest ai...
07 Jul
Control Valve Installed Characteristic Explained
A control valve can follow its catalogue flow characteristic on a test bench and still control too sharply, or too weakly, after it is installed...
07 Jul
Control Valve Sizing Guide: Cv, Pressure Drop and Common Mistakes
A control valve selected from pipe size or one maximum-flow point can be oversized at normal load. Control valve sizing starts with the operating...
06 Jul
Control Valve Outlet Velocity: Limits, Calculation and Risks
A control valve can meet the required Cv and still leave the outlet velocity too high for the body, trim, or downstream pipe. This risk appears m...
03 Jul
Choked Flow in Control Valves: Liquid, Gas, Sizing and Trim Selection
When a control valve reaches choked flow, lowering the downstream pressure no longer increases the flow rate if the inlet pressure and flow area...
18 Jun
Critical Pressure and Critical Temperature in Valve Sizing
A control valve can be sized incorrectly when the fluid data stops at operating pressure and temperature but leaves out critical pressure, critic...
25 May
Metric and Imperial Conversion Table
Metric and imperial conversion table provides a quick reference for comparing common metric and imperial units used in valve, flange, pipe, and i...
29 Oct
How to Convert NPS (Nominal Pipe Size) to DN: Conversion Table
Understanding global pipe size standards like Nominal Pipe Size (NPS) and Diameter Nominal (DN) is essential for engineers, buyers, and valve man...
28 Oct
Vapor Pressure Explained: A Guide for Industrial Applications
In industrial settings, even a small miscalculation in fluid behavior can result in reduced system efficiency, unexpected downtime, or damage to...
15 Oct
DN and PN Meaning in Valves
DN identifies the nominal valve size, while PN identifies the nominal pressure-rating system. The two markings describe different properties of a...
03 Dec
Understanding the Butterfly Valve Bolt Chart
Butterfly valves are a staple in industries like water treatment, oil and gas, HVAC, and chemical processing. These valves regulate flow in pipel...
29 Nov
Butterfly Valve Dimensions: A Complete Guide
Butterfly valves are commonly used in a wide range of industrial applications due to their simplicity, reliability, and cost-effectiveness. Wheth...
27 Nov
How to Measure Ball Valve Size: A Step-by-Step Guide
Accurate sizing of ball valves is crucial for ensuring system efficiency, reliability, and safety. Whether you’re working in oil & gas...
27 Nov
How to Calculate Ball Valve Weight
Calculating the weight of a ball valve is a crucial aspect of various engineering applications, especially in manufacturing, procurement, and ins...
25 Nov
Flange Pressure Ratings: Guide for Valve and Piping Systems
When it comes to valves, piping systems, and industrial infrastructure, flange pressure ratings play a vital role in ensuring safety, reliability...
Understanding Ball Valve Dimensions
Ball valves play an essential role in controlling fluid flow in numerous industries, including plumbing, oil & gas, and manufacturing. But wh...
22 Nov
What Is Valve Flow Coefficient (Cv)? Formula, Meaning and Sizing Use
Valve flow coefficient (Cv) tells you how much flow a valve can pass at a given pressure drop. It helps engineers see whether a valve is only the...