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After reading the responses here, from my experience, you will or can find out the maximum operating pressure as well as the burst pressure of valves. Perhaps not all vendors will initially supply the information, but any well-respected company will have test data on their valves performance...

Some additional reading material would be: "Hydraulic Component Design and Selection" Dr. Fitch and Dr. Hong "Hydraulic System Assurance" Dr. Fitch and Dr. Hong "Fluid Contamination Control" Dr. Fitch But if you want the original text regarding hydraulics, which originated from MIT, check out...

Well that is a question of your dynamic hydraulic system conditions. A 750 lbf load could create such issues in a system due to dynamic fluid changes. One such change is a water hammer effect. You must also consider any vibratorial issues that may occur due to natural frequencies. These issues...

Real quick to clarify. I know I'm stepping in half way through the conversation, but a clarification on what hydtools is trying to say in regards to tubing and piping needs to be expressed. Piping should typically never be used for your type of application with low flow, low pressure and small...

It is true, many are ignorant of contamination control, but it always does come down to money... Well I still consider negative thermal effects on a hydraulic system to be a merit for discussion of Contamination Control. From what I've seen out in the field, thermal shock usually creates issues...

I agree on bud on the design of the circuit to control a double acting cylinder and it is a bit vague in description. I'm assuming that the "Volume Counter w/ Indicator" is a flow meter with electrical output signal from best I can tell.

I forgot to add something regarding Peter's comment on auto-tuning. One of our current and most used fighter jets in today's warfare utilizes simulation software to determine leakage and system failure of their hydraulic system. It's named Model Reference Leak Detection Method, whereby a working...

I apologize for my lack of presentation on the equation side, but the reformat of what you presented is correct. The name for the constant equation used for the flow restrictor model is named: K_r = restrictor flow coefficient which is dependent upon flow and fluid characteristics...

You're right ISZ. There is still a long road for a complete understanding of contamination control within the Fluid Power industry. It is hard press to get an industry that has few trained and knowledgeable engineers to even start thinking about designing a system for reliability. Additionally...

I have been thumbing through the forum posts lately and figure that now is a as good of time as any to begin discussing different modeling equations necessary to calculate various fluid conditions of a system. I suppose coming from a mathematical background and my shear lack of faith in much of...

Yes that's very true. I suppose that there is a mischevious outlining force of keeping the capital to the few people that do know the knowledge. I'm not sure if anyone or group of people will have the tenacity to establish an institute to develop such training... I'm not sure how much more...

Good. Bud i'm glad you came in and provided some direction. I was rather waiting on it, but haven't had an opportunity to review your publications so I did not know the specific location to point him towards. Thinks for the additional insight.

Very true. My wife is looking at law schools right now and most likely Boston or DC, more DC then Boston, and I've been looking around to see what hydraulic engineering jobs are available at places like Monster and its hard press to find a job with the title "Hydraulics Engineer."

I suppose it would depend on the sizing requirements of the pump to determine cost efficiency. For some applications, fixed displacement pumps can be 200-300 dollars compared to a pressure compensated pump at 2000 dollars, but a VFD can run up to $4k. You also have to consider the use of a...

I think you're both right, but the question is where do you begin? I haven't been able to view the circuit due to the lack of software available at my office, but if he's missing such things as relief valves and design parameters, where would someone like to begin? The most direct approach is...

You are right, its so difficult to get a good moving concept of what should be done in hydraulics, but I suppose thats the ever lasting battle we deal with. To be honest, I'm not surprised to see it happen because for the most part people that do have the "knowledge" of hydraulics understands...

I agree with Bud here on this one. Your question is of obvious merit and concern for various working applications. One that comes to mind is the inherentely growing need to have precision robotic control in unique processes. The problem, as Bud stated, is that the manufacturers aren't required...

Bud, You are absolutely correct. For the most part, many "hydraulic" engineers only know the very fundamentals of how to design a system, yet alone being able to design for reliability. Numerous times have I gone to a company during a consultation visit and was astonished at their reliability...

Quick follow up. I was looking up your posts and threads and I appreciate your willingness to educate people and try to spread the knowledge of the fluid power industry. You may be one of the few out there that will help the industry stay alive and knowledgable.

Bud, Your post make me laugh for multiple reasons and I'll explain as best I can. You are absolutely right regarding the fluid power education. As you probably know, the original hydraulics study began at MIT and then migrated to OSU as the FPRC. This began after WW2 and great advances were...