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Hi All, I posted this in the Pressure Vessel group then realized this might be the better forum. I'm working on a project that involves the use of a 45g CO2 cartridge like you would use for a paintball gun or inflatable life preserver. We are going to sell the system which uses the cylinder...

Hi All, I'm working on a project that involves the use of a 45g CO2 cartridge like you would use for a paintball gun or inflatable life preserver. We are going to sell the system which uses the cylinder as a source of pressurized gas. My question is what EU Directive applies to such a...

Hello All, Pardon the intrusion from an ME here, but my company is currently working on a specialized solenoid valve controller that will packaged in a plastic case with aluminum front and rear panels. The front panel will be covered by a polyester membrane keypad. The product is powered by...

I have a chart where I would like to control the range of values to be plotted by changing the range value in a cell. That is, one time I may want to plot all 100 points of a series, next I might want only to plot 50 of them. Right now I manually adjust the series range by going into the...

Hello All, I'm building a kit plane that is taking longer than anticipated to complete. I have some AN470AD an AN426AD rivets that are over 4 years old. I have heard, but have been unsuccessful in confirming, that aluminum alloy 2117-T4 will age harden. My question is, if true, what is a...

I am working on a valve for a pharmaceutical process application and I'm trying to find a design standard for a aseptic fitting seal. The ASME BPE describes a European Hygienic Fitting that looks ideal (Fig SD-2(a)). However, they do not reference a standard. It is basically an o-ring face...

A quick and hopefully easy question: Is a Declaration of Conformity required for a pressure vessel classified as SEP under the PED? Thanks, Mike

Are there any industry specifications/certifications for valves used in the food and pharmaceutical industries? We are looking at redesigning a couple of our valves for this industry and I've just started to review the industry's requirements. The FDA seems to provide no other guidelines other...

Are there any industry specifications/certifications for valves used in the food and pharmaceutical industries? We are looking at redesigning a couple of our valves for this industry and I've just started to review the industry's requirements. The FDA seems to provide no other guidelines other...

I have noticed a common warning on certain types of equipment cautioning against using halogenated hydrocarbons with aluminum components, especially pressure equipment. What is the specific reaction that takes place between aluminum and halogentated hydrocarbons? The only thing I can imagine...

I have a C36000 brass threaded plug that I would like to use in a 303SS component. My galvanic table suggests this shouldn't be a problem. Anyone out there with practical experience with this combo? Should pipe tape be used here? Thanks, -Mike

I'm trying to write a macro that on a button click, opens another file then opens the "Save As" window so that the user can enter a new file name and location of their choosing. I have no problem opening the file, but the ActiveWorkbook.Save As command wants to actually perform the...

I'm looking to add a diametrical datum call-out on a shaft. I want it to be the square call-out with the filled triangle in line with diameter dimension per the ASME Y14.5M-1994 standard. The dimension is on the profile view of the shaft. I cannot for the life of me find a clean way to do...

My company manufactures two small (1L and 5L) cast aluminum tanks that we are looking to sell in Europe. One tank is SEP while the other is a Category 1. First, is there anybody out there that can hand-hold us through the process of certifying these tanks? (I know the SEP tank cannot bear the...

We manufacture a couple of small cast aluminum pressure tanks that we are looking to sell in Europe. Both tanks fall under the Sound Engineering Practice article of the PED. The tanks are so old that we have no design or qual test documentation, only drawings and QA inspection test results...

I'm looking for any good references that deal with transient fluid mechanics (pneumatics in particular). Any texts will do, but I am particularly interested in more practical, industry related texts. I'm dealing with several fluids problems with short time scales (< 1 sec) and small volumes...

I'm looking for a fairly flexible hydraulic hose that has an outside diameter of no more than .25&quot; (6.4mm) and can withstand up to 1000psig (includes FOS). The hose would be subjected to cyclic loading of essentially 0psig to its operating pressure every second or so. I might be able to...

Is anyone aware of any peculiar properties of uncured RTV silicone that would make it particularly difficult to seal against? I have a spool valve that works great with every fluid except RTV silicone. With RTV, the double lip seal that seals between the reciprocating shaft and the atmosphere...

I'm having an issue with a small spool valve that dispenses everything great EXCEPT RTV Silicone. The silicone eventually works its way past the upper double lip shaft seal and causes binding of the valve. I've spoken with Dow and they recommend purging all RTV dispensing equipment immediately...

I'm having an issue with a small spool valve that dispenses everything great EXCEPT RTV Silicone. The silicone eventually works its way past the upper double lip shaft seal and causes binding of the valve. I've spoken with Dow and they recommend purging all RTV dispensing equipment immediately...