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V Port ball valves explained
Thu 18 Jan 2018

V Port ball valves explained

In this instructional article, we take an in-depth look at the inner workings, and relevant applications, of V-Port Ball Valves. In order to do that however, let’s take a step back and refresh our understanding of ball valves in general.


What is a ball valve?


A ball valve has a spherical closure unit that provides on/off control of flow. This sphere has a port, or bore, through its centre. When the bore is aligned in the same direction as the pipeline, it is in the open position and allows fluid to flow through it. Rotated 90 degrees, the bore is perpendicular to the flow path, therefore closing the valve and preventing fluid to pass through.


Ball valves are a member of the quarter-turn valve family. They offer reliable sealing and are ideal for gas applications requiring tight shutoff. On the other hand, the potential for constant wearing on the seats makes them less ideal for throttling applications. Ball valve bodies are typically constructed of steel, but more durable nickel plated versions are also available. 


Common ball valve types


The most common ball valves are two-way, allowing linear flow from inlet to exit. Three-way and four-way ball valves additionally allow for flow to travel in multiple directions – including 90-degree angles. The four main body styles include: fully welded, three-piece body (side or end-entry), split-body, and top-entry. The valve operation is essentially the same in each type. Three basic types of bores exist for ball valves. These are full port, reduced port (standard port), and v-port.


What is a V-Port Ball Valve?

A V-Port Ball Valve has either a ‘v’ shaped ball or a ‘v’ shaped seat, which allows the orifice to be opened and closed in a more controlled manner with a closer to linear flow characteristic. This type of valve is also known as a control valve, whereby the flow velocities need to be controlled as required per the application.


How does a V Port Ball Valve work?

When the valve is in the closed position and opening is commenced the small end of the ‘v’ is opened first, allowing stable flow control during this stage. This type of design requires a generally more robust construction due to higher velocities of the fluids, which might damage a standard valve. Despite being a control valve, they are not considered to be as accurate as a balancing valve, needle valve, globe valve, or pressure regulating valve.


What applications require V Port Ball Valves?

In general terms, ball valves are used in a variety of applications and markets, such as transmission and storage, gas processing, industrial, and many more. V-Port Ball valves are commonly used in acid transfer, agriculture, bleach chemicals, water treatment, leaching acid, pharmaceuticals, waste processing and food processing.


Speak to one of BME’s knowledgeable advisers about our full range of V Port Ball Valves today by calling 0141 762 0657 or email sales@bmengineering.co.uk. For more information please visit www.bmengineering.co.uk.test.

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