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Butterfly Valve

In a production plant, we need a very good process control equipment and system. We learned the theory in a Chemical Engineering subject called Process Control and Instrumentation. It was hard for me to imagine what process control and instrumentation is all about when I studied the subjects few years back.

When I start working in a plant, then everything becomes clear. One of the most important equipment is valve. There are various types of valve. We have butterfly valve, ball valve, gate valve, globe valve, check valve etc. Each type of valve have their own pros and cons as well as functional area. There are a lot of things to talked about valve. However, in this post, I'm going to cover just a little bit about butterfly valve.

The following photos illustrate a typical butterfly valve. It is a 3" Belgium Ventiel (BV) butterfly valve. This valve have created a very serious contamination and lost earlier because it leaks.

A typical butterfly valve. This is a gear type. The gear is used to open or close the disc. The disc is made of stainless steel.

A closer look to the butterfly valve when it is fully open, allowing liquid to flow passing through it. It is now fully open.

The red arrow shows the seat / liner is damaged and worn out. This is one of the reason leakage can occur from a valve. There are various type of seat / liner to choose for different type liquid and process conditions. The disc is half open.

Another angle of the butterfly valve. Extra photo for you to have better comprehension of this piece of equipment.

Later, in coming post, I shall elaborate more about valve. Don't have much time now. Need to go to work.

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posted by Kipas Repair JB @ 10:53 AM,


At Saturday, February 24, 2007, Blogger zura said...

Thanks for capturing the real picture of the butterfly valve. I can't imagine how it looks like before. Tq.

At Sunday, February 25, 2007, Anonymous Anonymous said...

well, that is just a 3" butterfly valve, just imagine a 90cm butterfly valve. It's so heavy..and the seat is very expansive....

At Friday, September 12, 2008, Anonymous Anonymous said...

Thanks for sharing the impotance of butterfly valve.

At Wednesday, February 18, 2009, Blogger Unknown said...

Good article.

At Friday, May 29, 2009, Anonymous gate valves said...

this valve looks very tough and i think it would last for a lifetime.

At Wednesday, September 02, 2009, Anonymous valve actuators said...

Complex control systems using valves requires an automatic control based input of an actuator. The actuator strokes the valve allowing the valve to be positioned accurately and allowing control over a variety of requirements.


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The Author


I’m Zaki. I used to be a project, process and chemical engineer. Few years ago I successfully became a Chartered Engineer (IChemE) and Professional Engineer (BEM). I'm now employed as a chemical engineering educator/researcher/consultant. Hope you like reading my blog. I welcome any feedback from you. My email: zaki.yz[alias]gmail.com. TQ!

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