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Thank ione, this chart shows that JP-8 & JP-10 is ok with PTFE. This is perfect. Now I need to find which metals are OK with JP-8/JP-10. Stainless is OK for sure but my main concern is Bronze.

Thus far with my researching, I've seen that the only Elastomer that is compatible with JP-10 is Viton. In terms of plastics, it is very hard to find information regarding PTFE (Teflon). Does anyone know if PTFE is compatible with JP-10? In terms of metals, I honestly have not found any...

If anyone has a link to an online chart that has any compatibility information of any material with JP-10, please post it.

Hello, Does anyone know of a book that would cover corrosion resistance of JP-10 with various elastomers / metals? From what I've seen, there only seems to be Viton that is OK with JP-10. Nitrile (Buna-N) is not OK and I'm not sure about PTFE Teflon? Does anyone know of some charts that include...

Yes that's what we will most likely be doing... Keeping it simple with a relief valve that sends the over pressure back to the fuel tank. That way there won't be any risk of missing fuel to the engine. I will keep note of this thread as there are some very interesting points that were brought up...

zdas04, yes we want to maintain a pressure of 30-40 psig approximately, while the consumption increases/decreases. my logic, is that as the consumption increases, the pressure will decrease, so in turn the VFD will make the pump turn faster and give more flow to bring the pressure back up. i am...

Hi, I am looking into installing a VFD (variable freq. drive) on an existing rotary pump (PD pump). This pump supplies several engines with fuel (3 branches). I want to figure a way to adjust the RPM of pump motor to vary the flow out of the pump all depending on what the engine really needs...

But do they exist as standard parts? Or are there gauges that come with this feature? An orifice-type gauge for instance?

But if you just slightly crack open a needle valve, wouldn't it work just the same? Are there any standard parts that could be used? It is 1/4" NPT gauges that will be installed. The liquid is jet fuel.

Hello, I read the FM Global Code 7-32, and there is a rule regarding pressure gauges to reduce leakage to a minimum: "Use restricted orifices in piping connecting the gauges to the equipment." Would this juste be a needle valve? Or is it referring to some other device? Thanks Gabriel

I do agree with ione, and from experience, you can't go wrong with Viton. The only situation that I had a problem with Viton was when I had low temperatures. Other than that, it's compatible with almost everything!!

Hi, I would like to know if Reinforced PTFE is compatible with JP-8 and JP-10 jet fuel as well as Diesel Fuel? I am trying to find a fire safe ball valve in a 1" pipe size and the seats only seem to be in R-PTFE which does not seem to be compatible with JP-8. Any suggestions? Thanks Gabriel

EDIT : The parker catalogue would NOT cancel out the units because T2-T1 in Kelvin will not equal the same value in degF. For example a delta temp of 8.33K would be 15 degF delta Temp.

Hi, I am just trying to confirm the units ... The pressures P1, P2, P3 have to be in psia? Temperature in degF? Alpha & Beta has unit of degF^-1? Is this correct? This will give me an accumulator volume with the same units as the fluid volume? What's confusing me is that in the parker...

I just found in the Parker catalogue # HY10-1630/US a method for calculating the accumulator volume required for thermal expansion. All that ends up happening is that the accumulator is oversized slightly such that the pressure doesn't increase past the max allowable. It all makes sense now!

Hi, Does anyone know of any software that can be used to size an accumulator for thermal expansion? As a side question, when the trapped liquid pressure increases, the nitrogen side of the accumulator will increase in pressure. Does the liquid side pressure increase? For example, let's say the...

Hello, Does anyone know of any SAE Standards or California codes in regards to jet fuel distribution piping? It's for pipes sizes of 1-1/2". Thanks!!

Hello, I am currently working on a design that is a fuel distribution system that supplies fuel to several test cells (1" Pipe Size). Would anyone know of an engineering firm that could assist in drawing approval in California? We are located in Canada and we want to be able to get the drawings...

Biginch, I didn't want to use a Block & Bleed valve as I didn't see how it would solve the problem of thermal expansion in a closed circuit. Do you see how it can be useful? The only option I really see if a properly sized accumulator with a pre-charge just above max operating pressure. I need...

On a similar topic... The use of a single block & bleed valve only provides a way of isolating the system and incorporates a port to vent trapped pressure? Since this is jet fuel, it would have to be sent back upstream where an open circuit is present and the pressure can be relieved. I guess it...