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HOW IS THIS PART MADE

HOW IS THIS PART MADE

(OP)
So I am designing a check valve for a triclamp, and was looking at designing something pretty much just like the pic except without the o-ring as the triclamp has a gasket. My question is how they make the swing plate? Is it two pieces, a pin and a plate welded, or is this one stamped part and the pin part is rounded after? How I have it currently is using a 2mm pin stainless with a plate thats welded together and ground smooth, but I have not actually made it yet...best approach?

RE: HOW IS THIS PART MADE

The pin will usually be a close-fit smooth finish into the two end bearings, and a different fit and finish across the middle part of the hinge. Probably a different metal as well (round stock rather than cast or forged metal as the rest of the wafer and valve body). Correction: Cast with the flapper, then machined round. Could be welded, but it doesn't look like that. If I had to do it, I'd a round tool like a die for screw threads, but to cut it smooth all around the outside.


Assembly is by threading the two bearings onto the pins.. Then those three parts (maybe four if there is a bushing in the flapper) are screwed into the valve body.

RE: HOW IS THIS PART MADE

(OP)
Thanks guys

RE: HOW IS THIS PART MADE

What is the pressure range?
How perfect Does the check valve sealing need to be?

RE: HOW IS THIS PART MADE

If the pin is 2mm in dia, why do you need a lifting eye, and where do you get one that small?

Mike Halloran
Pembroke Pines, FL, USA

RE: HOW IS THIS PART MADE

I think the swing plate is made by casting plus polishing and cnc machining.
the picture is a little small and not so clear.

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