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Gear Pan
The lil Gold Spinner
The lil Gold Spinner
The Pocket Sluice

Author Topic: Hand Dredge Check Valve Size and Orientation  (Read 1717 times)

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Online DharmaSoldat

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Re: Hand Dredge Check Valve Size and Orientation
« Reply #20 on: September 06, 2018, 09:27:58 PM »
Been a long time since I rapped at ya...

Gym sock makes an ideal seal around the test plug assembly. The custom valves work great with hard foam seals keeping them in place.

Tests today show it performs great with the 8" nozzle - it would probably perform even better with a shorter nozzle and a better rock guard that wasn't embedded in the centre of the tube - all in good time.

Invested in a 2" MIPT -> hose barb adapter and it works great - going to invest in a relatively cheap shop vac hose to hook it up to a bucket and see how it does with some mid-stream boulders - some of which had collections of old axe heads and such around them.

Cheers




Online DharmaSoldat

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Re: Hand Dredge Check Valve Size and Orientation
« Reply #21 on: October 06, 2018, 05:16:41 PM »
This is my last update.

Bought a 2.5" x 8' shopvac hose from Lee Valley tools and two hose adapters.

Works like a charm and the diameter of the hose and adapters means the lid no longer pops off the 5 gal. pail anymore.

Huzzah!

Online DharmaSoldat

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Re: Hand Dredge Check Valve Size and Orientation
« Reply #22 on: October 26, 2018, 07:42:28 AM »
I lied. Sorry guys.

I am back in the lab working on a new valve design using ABS union fittings that should keep the same flow rate within a more compact and cost effective package.

We'll see how this goes.


[edit: the megasucker works fine - I just lied that the previous post would be my last...]

Online DharmaSoldat

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Re: Hand Dredge Check Valve Size and Orientation
« Reply #23 on: November 04, 2018, 06:21:10 PM »
Finished the glue work and such for the version 2.0.

Tested it out with some makeshift valves in place - worked decent but has to be primed to work properly. This might not be a problem if I get the valve design right.

Looking forward to testing this out with gravel.

Some pics with inch ruler for scale:

IMG_1784.jpgIMG_1785.jpg

Offline mcbain

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Re: Hand Dredge Check Valve Size and Orientation
« Reply #24 on: November 04, 2018, 07:19:14 PM »
Hi.You may have figured this out already but shop vac hose is pleated and acts like a sluice.any gold you find will be in thehose.i had the Royal gas powered vac and did not get gold until I flushed the intake hose.All your hoses should be smooth lined.Luck Mcbain.
I started out with nothing Istill have most of it.

Online DharmaSoldat

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Re: Hand Dredge Check Valve Size and Orientation
« Reply #25 on: November 04, 2018, 07:57:55 PM »
Hi.You may have figured this out already but shop vac hose is pleated and acts like a sluice.any gold you find will be in thehose.i had the Royal gas powered vac and did not get gold until I flushed the intake hose.All your hoses should be smooth lined.Luck Mcbain.

Yeah... I have a source for smooth lined segmented hose, but I make sure to flush the lines thoroughly every time I use it...

 


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