Who does industry turn to for high pressure gate valves and strainers for 6000psig? Connection size would be 1-in NPS. I seek 1-1/2 in NPS, as well, but I could neck down to accept 1-in NPS.
Also, how about an adjustable relief valve (RV) between 10,000-15,000psig? If that sounds too rare, how about a fixed set point of 15,000psig? It must be 1/2 NPT connections, minimum. (This is all liquid service, flow is <10gpm)
Also, the vendor(s) you suggest must be in the USA.
(FYI: I did find one adjustable RV in the correct range, but the connection size is 1/4 NPT - which is sub-standard per ASME Code B31.1 (or B31.3?))
Any suggestions? I’ve mined this to death, and it’s do or die.
Parker sells valves and filters rated at 6000psi or above. Relief valves are a little harder to find, particularly in high pressures. Not something Grainger would stock, sad to say. We use some made by Hawe, but it looks like they’re not as high pressure as you’re looking for. A little poking around led me to Bieri Hydraulics; their adjustable pressure relief valve DV2 can be purchased in pressure up to 1000 bar, which looks like what you want.
Try Tescom, an Emerson company. They make mostly pressure regulators for both high and low pressure systems, and if they don’t have a product for what you’re looking for, they might know of where you can get it. They’re based in Elk River, Minnesota.
They’ve had contracts with NASA and various other U.S. governmental agencies, too, so they’ll know about those type of personnel constraints.
The “Sno-Trick” line, sold by the Crawford Fitting company, would work. “Swagelok” is one of their brands. Since the old man died, they have been getting closer to selling tubing - maybe they do now - so you’d have single source convenience.
There is a company in Erie, PA called Autoclave Engineers that makes and sells all sorts of high pressure equipment. I was impressed that they had small tanks rated for 150,000 psi as stock items in their catalog. I bought a supercritical CO2 extraction system for them with a custom pressure vessel that was 18" in diameter and 24" long inside, and one end could be completely opened. They machined it from a much larger chunk of solid stainless steel, including the castellated nut on the top that held the lid on. The lid pushed outward with a force of five million pounds during operation.
They showed me around their plant, and I asked about a big patch on the plant ceiling. They said somebody used the wrong grade of bolts when assembling a vessel for testing, and the lid, which was about a foot in diameter and three inches thick, solid steel, just blew off and went out the roof. They patched the exterior to stop rain but left the interior jagged and scary, as a reminder to be thoughtful about fastener grades. The lid itself was never recovered, after extensive searching.
I was coming in here to mention that Hydraulic hose fittings are routinely spec’d to 2 or 3000 psi…but I see you’re looking at quite a bit more than that.
WTF for?!?
(I used 37 degree flared fittings and 3000 psi hydraulic hose when the transmission cooler lines in the racecar popped off, dumping 14 qts of fluid…rapidly. All over. Looked like they armoralled the engine bay. Took out a brand new tranny, too. Tranny pressure doesn’t crest 350 psi, so I figure I had an adequate S.F. figured in. )
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