3/4" diaphragm valve

[jackssmirkingrevenge]

Found this little blighter at work which seems to correspond to the Gemü model 610, well made bit of kit. The preload on the springs is tremendous, I doubt I'll actually find a use for it but just thought I'd share.

[elitesniper]

are those unions on the side?

[jackssmirkingrevenge]

Yeah, found them with the valve.

[rna_duelers]

Nice find,wonder why there is two strong springs for such a small valve.Not sure how one would go about moding it.

[Acdcmonkey1991]

maybe get a less strong spring and use a 1/8 in ball valve
edit: sorry to get off topic but I just noticed that we have "welcomed" almost 3000 new members in the past 3 months at the most.

[sniperjosh]

That valve could be modded quite nicely imo :O. Have a play around with it, would be great for a compact small bore.

[King_TaTer]

Ya pretty sweet, is there any indication of a preassure rating?

[MrCrowley]

If my eyes read that blury label correctly, it's only a 15mm valve?

[King_TaTer]

15 millimeter = 0.5905511811 inch

hmm who knows, but seeing as JSR has it, he's probably right. but cheers for trying to read it, i didnt even try...

[MrCrowley]

I wasn't replying to your post King_tater, just stating that's it's a small valve.

I think I see DN15 PN5 PVC

Which simply means... Diameter 15mm, Pressure rating 5BAR made from PVC.

5 BAR is about 72.5PSI

So there's your answer King_Tater, 72.5psi it's rated to... I think.

[jackssmirkingrevenge]

DN15 PN6 PVC - not very useful at only 6 bar eh?

[MrCrowley]

Ah it's a 6, damn my eye sight

I thought it was between 5 and 8, looked closer to 5. Now when looking at it, it's clearly a 6.

I don't think anything rated under 18BAR is much use to you JSR

[jackssmirkingrevenge]

I don't think anything rated under 18BAR is much use to you JSR

Besides, off the shelf components?! pffft! what would the neighbours think? hehe

[Ragnarok]

15 millimeter = 0.5905511811 inch

Why quote it to that accuracy?

Firstly, it's probably only nominally 15mm - the seat diameter could be a mm or more either way.
Secondly, it wasn't made to that accuracy in the first place, nothing can be.
Thirdly, you can't measure to that accuracy, because it won't be a perfect circle of a single diameter.
Finally , the heat expansion or contraction from a change in temperature of just a few degrees ^oC will make the last 5 or 6 dp completely pointless.

0.6 would have been fine, 0.59 would have been better, 0.591 would have been overkill, but acceptable - what you did was both too much.

Not to get at you, but as a general rule, you should never quote to more significant figures than your original data - one more is acceptable though.

This post was brought to you by the association of pedantic engineers who've not slept properly and have eaten too much sugary stuff.