Globe vs. V Port Ball Valves for Flow Control Applications

Posted on November 30, 2018 by Brian Booth

In most process applications there are two different types of valves used: on/off and control. On/off valves allow full flow or stopping flow completely. Control valves, in contrast have the ability to control the AMOUNT of flow, also known as throttling.

V-Port Ball Valves

V-Ball Control Valve

V Series V-Port Ball Valve

V-Port ball valves are a specialized ball valve that offer:

  • Suitability for coarse control applications
  • Reliable shutoff
  • Many different V-Port balls options available to accommodate different flow ranges with the same valve body, most common being 60˚, 30˚, and 15˚


Globe Valves 

GVI Series Globe Valve

Globe valves use linear actuation and offer:

  • More precise control due to a more linear flow curve (See Figure 3 below)
  • Do not suffer uneven wear in the mid positions
  • Typically have higher pressure drops than V-Port valves

However, they do not typically provide a bubble tight shutoff. They also require greater force or a larger actuator to seat the valve.

 

V Port Ball Valve and Globe Valve Comparison

 

V Port Valve Globe Valve
Function 2-way flow control 2-way flow control,
3-way mixing,
3-way diverting
Positive Shutoff YES Not leak free
Control Capability Coarse Fine
High Duty Cycle NO YES (constant)
Flow Capacity Higher Lower
Cavitation Prevention —
High Temperature — Preferred
Ease of Maintenance — Preferred
Cost More economical —

V-Port Ball Valve (rotary) vs. Globe Valve (linear) Flow Curve

Download full article as seen in Valve World Americas

V-Port Ball Valve (rotary) vs. Globe Valve (linear)

About Brian Booth

Brian Booth is Vice President of Sales at Assured Automation, a leading provider of Automated Valves, Flow Components, and Fire Safety Products for industrial process control applications for over 30 years. Assured Automation provides state of the art automation ranging from small equipment manufacturers to the Fortune 500 Manufacturing, Chemical and Pharmaceutical Companies. The Assured Automation product line consists of a complete offering of standardized automated valve assemblies with a variety of commonly used accessory items. In addition, we offer complete valve automation services where we supply special automated valve assemblies designed around your specified products or your particular applications. Full design capabilities are offered including AutoCAD, Solidworks or other commonly used design and drawing programs. In addition to standard products, Assured Automation develops customized solutions for specific customer requirements.
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