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Author Topic: Hand Dredge Check Valve Size and Orientation  (Read 3433 times)

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Offline suburbanator

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Re: Hand Dredge Check Valve Size and Orientation
« Reply #10 on: July 22, 2018, 07:58:31 AM »
Well,  if your not to far from me (Langley) your welcome to come check this one out.

Or come up and try it in the field.

Might give you some ideas.

Offline DharmaSoldat

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Re: Hand Dredge Check Valve Size and Orientation
« Reply #11 on: July 22, 2018, 05:28:48 PM »
So I went down to the creek, found a nice big boulder and tried out the new valves. They work awesome.

I managed to capture half a 5-gallon pail's worth of gravel in a few strokes.

Still have to work out some glitches on the upstroke as it gets pretty tight after a while. I think I just have to find a more optimal 'sock' material to build out the seal (probably one of my old wool socks, to be honest) as the rubber plug by itself has too much friction as finding that sweet spot is a lot of fiddling.

Still does not perform as well as the suction body just by itself. Different purpose - different tool I suppose.

Offline mcbain

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Re: Hand Dredge Check Valve Size and Orientation
« Reply #12 on: July 22, 2018, 07:37:39 PM »
Ouch.Luck Mcbain.
I started out with nothing Istill have most of it.

Offline DharmaSoldat

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Re: Hand Dredge Check Valve Size and Orientation
« Reply #13 on: July 22, 2018, 07:43:13 PM »
What can I say, man... it's a process :D

Offline CLHaddon

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Re: Hand Dredge Check Valve Size and Orientation
« Reply #14 on: July 22, 2018, 11:20:12 PM »
Dharma I  built my own crevice sucker using similar materials and also found that the rubber on the plunger got really sticky and difficult to use. I had some cheap felt laying around so i just cut a square of that and put it over the whole thing and it works way better. I threw a couple extra squares in my kit because I expect it to wear out. Nice work on the design, way better than mine!

Offline beav

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Re: Hand Dredge Check Valve Size and Orientation
« Reply #15 on: July 23, 2018, 03:00:16 AM »
Hey DharmaSoldat!
Thanks for U/L'ing the pics. Now I can see things make more sense now.
That's a cool idea using those backwater valves, instead of the normally flow-restricted sump pump check valves.
I think you did a great job on this. At least now you have a basis of something you can perfect and iron the 'kinks' out of.
Kudos!  {cool^sign}
Beav

Offline suburbanator

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Re: Hand Dredge Check Valve Size and Orientation
« Reply #16 on: July 23, 2018, 11:28:51 AM »
The plunger used on the unit I have is a leather product of some sort.  It requires soaking for a while prior to use.
Your welcome to PM me and come have a look or I can try and send some photos.



Offline beav

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Re: Hand Dredge Check Valve Size and Orientation
« Reply #17 on: July 23, 2018, 04:44:27 PM »
Does it look like this?
seal.jpg

Offline mcbain

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Re: Hand Dredge Check Valve Size and Orientation
« Reply #18 on: July 23, 2018, 08:19:17 PM »
Hi.guys.Rubber is outFelt or leather works the best.Remember the blue felt insoles you can buy for your boots? real cheap about 7.00 bucks for 2.You can make a lot of seals whith those.Just saying Mcbain.
I started out with nothing Istill have most of it.

Offline DharmaSoldat

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Re: Hand Dredge Check Valve Size and Orientation
« Reply #19 on: July 23, 2018, 10:23:36 PM »
McBain, that's what I found in my research and testing.

Currently I fit the rubber stopper with a shopping bag that is a fabric material akin to a 'rough silk' or polyester. Works great but I suspect that because of the volume of material it is causing stroke issues and also makes it difficult to get the end cap off.

I figure using one of my old wool socks should do just fine between forming a good seal and reducing friction enough to make it easier to handle and not stick as much.

Jokes aside, I look forward to trying this out @ the creek.

 


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