Manufacture of a check non return valve for hand pump.
Necessary material:
- Tube Pvc size desired for the case this is the 80mm in diameter
- A 3mm thick expanded pvc plate
- Glue gel PVC
- The truck air Chamber (recovered in tire center)
- Neoprene contact adhesive
- 4 Small screws 3mm in diameter by valve.
For tools:
- A good cutter
- A pencil
- A drill
- Fine grain (80) to very fine sanding disc (120)
- A brush sanding with Emery cloth.
- Forest of 2.5 mm for the front screw holes
- A 3 mm for the screw hole drill
- A 3mm tap for the screw pitch
- A hacksaw
And it's gone...
Firstly the valves will be integrated to the pump and the pump body (T PVC) suction and delivery.
Valves do not have the same size as to be effective and to avoid that valves block by the vacuumed materials, it is necessary that suction valve "spits directly in the outlet duct."
here is a PDF of how to built those valve, they work very well
http://yann.georgeais.free.fr/Manufacture_non_return_valve_for_hand_pump.pdf
you can see this one way hand pump in opération on this video
https://www.youtube.com/watch?v=7cPrU5sOqfg
Yann
Comments
Thanks for posting this Yann. I going to try this valve on the next hand dredge I put together. :)