Fluid Experiment - Valve Design?

Shafikdotnet,

My suggestion is simple: do what an engineer would do when faced with a similar challenge he hasn't worked with before. Examine the designs of existing valves that control similar fluids in the manner you seek. This information is readily available on the web and in the literature of valve manufacturers. If creativity is the goal of the exercise, you will know from where to leap for your own concept, otherwise don't waste time "re-inventing the wheel".

Good Luck!

Regards, Greg

thanks man this is what i am doing but i was asking to have just new ideas for a different design

Shafikdornet,

"thanks man this is what i am doing but i was asking to have just new ideas for a different design"

New ideas for what application?

Different from what?

If you are going into engineering, then you should learn to be much more precise in your question: There are too many types of valves to spend time here giving you ideas to such a vague question. All you offered was pipe size, flow and temperature.

You have given no information about the desired operation of the valve! Not a clue as to pressure, fluid, manual or power actuated, just open/close, or control/metering etc.

Instead of doing some work as I suggested, you thank me, and come back again for "ideas" without defining the purpose of the valve.

Perhaps you are pursuing the wrong career; engineers need an analytical mindset for problem solving and design. I gave you good advice and deliberately referred to "your application" because you offered no details. You are asking people here to spend their time trying to guess what kind of valve you want while you are too lazy to tell us.

Properly defining a problem is the first step in its solution.

Regards, Greg

As a Fluid Power Engineer for over 20 years I can say that the chances of anyone discovering a new type of fluid control valve is virtually non existent.

You have: Poppet, spool, disk, cone, ball, gate, butterfly, wedge and various elastomer orifice valves that have been manufactured for decades.

You control fluid by controlling the flow and there just so many ways to do that.

Take Greg G's advice; stop trying to "re-invent the wheel".

Intelligent design is taking the best existing products for a particular application and applying them to design an effective and trouble free system/machine. People do not like being testers for unproven designs. They want something that will do the job reliably and at a fair price.

There have been temperature compensated flow control valves around for over 40 years.

Remember, as an engineer, your job is to come up with a working solution in the minimum amount of time and cost.

The patent literature is another place to look for useful information. Go in and have a look at various valves by classification. Sorry, don't ask me how. That's all discoverable at www.uspto.gov if you want to learn.

Waste of time

Hi Shafik.net

Whereas I respect Greg G a lot, and agree somewhat with prbarry and Greg, I'll pose another way to think. I am alway accused of thinking outside the box to which I reply "Is there a box ?" Get inside the head of the professor. What is he/she trying to teach you? Valve design, or methodology and research skills for any design? "prbarry" might be right, but, I suppose grass cutting machine designers thought they had invented all types of machines to cut grass 30 years ago until a dance instructor in Texas put fishing line on a coffee can and invented the string cutter.

I suppose every type of bearing had been invented for the last 200 years . . . . until someone thought up magnetic bearings, or air bearings, or ultra high pressure bearings. Can you put a 10 mega watt pump and electric motor mounted on a pipe stuck in the sea floor in 3,000 meters of cold water and eliminate the need of an offshore platform . . . . I'm doing that right now.

The professor may not be impressed with your final design (a needle valve), but might give you high marks for your methodology. Develop a matrix of what this valve must do, ideas to make it do it, risks, failure mechanisms possible, technology possible, research required for technology, etc. So, for example the entries for "Must resist flow without the fluid reaching its vapor pressure" can have branches for normal concepts of accomplishing this mechanically, and the risk branches would include Cost, Cavitation, Noise, Vibration, etc . . . . but what means are out there to solve the real problem of pressure drop through the valve, controllability, cost (I use 'unobtanium' a lot for valves where as Greg G. prefers 'costalloy'), safety, manufacturing . . . all of this without pulling gasses out of the fluid. What causes resistance to fluid movement? Mechanical means ? Chemical? Electrical (including magnetism)? Electronic ? Sound? Hydraulic? Can you use the energy of the fluid itself to resist it's own flow ? Can you make a tortuous path through your valve with multiple pressure drops (if it is ultra high pressure) and have the fluid re merge in an acoustic chamber and utilise pressure pulses to control flow . . . bla bla bla. Think way outside this "box" that others will try to put you in. If the problem is cavitation, most will think of mechanical means around that . . .. but can you condition the fluid by magnetic means ?? Chemical means ??? to be less sensitive to cavitation. I don't know any answers, but putting silly ideas on the table begins a thinking process that leads to clever ideas. Then when you are done with this 2 months of matrix . . . use a needle valve and that's it ! (Ahemmm).

George

hi i sandeep

my suggestion is simple as Garg , first just carry out the experiment on avilable valves , then note down down the problems faced with that , then try to eliminate these using some feasible concepts

Which <...fluid...>? The wetting agent is important for the longevity of the <...valve...> and its internals!

There are so many options available commercially that it is unnecessary to <...design...> a new one.