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The market has many types of control valve bodies. Depending on your application, one body type may offer you better performance than another.

Let’s review the elements. You have the main parts, the body and the actuator. Then you have small parts, such as bonnets, valve plugs, seat rings, and gaskets.

control valve parts
Courtesy of Thepinsta

Control valve body types

The body part of the control valve stays in contact with the product. To handle the temperature, pressure, and chemistry of your product, you need to scale out the right material and CV (coefficient of the valve). If you want to learn more about CV, then read this article here.

When we talk about valve types, we mean control valve body types. We can divide them into two groups, linear and rotating. A linear control valve uses the straight-line motion of a sliding stem to reduce or increase flow. And a rotating control valve has an element that turns within the stream to reduce or increase it.

Linear control valve bodies

  • Diaphragm
  • Globe – angle, three-way, standard straight (double- or single-seated)
  • Pinch

Rotating control valve bodies :

  • Ball – full, segmented, V-notch
  • Butterfly – lined, unlined, eccentric
  • Eccentric plug – flow to close (FTC) and flow to open (FTO)

If you have further questions, we also advise you!

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More resources on control valves

#WishIknew – What’s a control valve positioner?
#WishIknew – How do I calibrate a control valve?
#WishIknew – How does a pneumatic control valve positioner work?

Still curious about control valve body types? Ask our experts.

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