DAAM HP seats

[treasureman]

HI Guys. I have been working on finding a replacement material for the HP seats for DAAMs.

I think I may have found just the ticket. problem is this. All the DAAM seats I have are nearly mint with one NOS. I need a a DAAM HPO seat that us beyond use. I will burn it out to see what the underneath configuration is. I have procured two rods which one is a very tough nylon which feels like the HP seat, the other is a teflon rod. Also feels like the HP Seat.

In any event, I will have to turn them down slighly to get a good fit I think.

If any of you have some worn out cant be used HP seats for Daama, please let me know.

I have tested a special aircraft grade epoxy cement which holds just about everything. Darn near need a hammer and chisel to get the nylon off a metal bar I glued it to.

[captain]

I have never burned out a DAAM seat but I have burned out a Mistral seat. The cavity in the Mistral is just a flat bottomed hole. The metal pin in the middle is just a short pin that is concave on one end that is pressed into a hole in the center of the seat. I imagine the DAAM seat is made the same.

[treasureman]

I would imaginbe it would have been easier to machine a flat bottomed hole than a tapered one, so you are probably right captain.

[JES]

I would imaginbe it would have been easier to machine a flat bottomed hole than a tapered one, so you are probably right captain.

Tom is an incredible source of double-hose information. That's why he's the Captain.

[1969ivan1]

He is the CAPTAIN 'cause of that awsome boat he rebuilt! I can't wait to dive off of it! PERMISSION TO BOARD CAPT?

[pescador775]

For a hard seat like that in the Aqua Master, good old teflon, PTFE, is the way to go. Teflon has the added benefit of being oxygen safe.

[Bryan]

How many people actually dive a double hose when using an oxygen mixture above 36% ?

Let us know what you find out in your research on the seat material for the DA I have been working with a specialty manufacturing company on this subject for a couple of months now....I don't have the final details worked out yet or I'd say more about it.

[treasureman]

Will do. I am,picking up about a foot of rod Nylon and teflon, it will have to turned down to the right diameter. I have a small unimat lathe that will do this nicely. The I anticipate cutting a one inch section and drill a hole down the middle the same size or slightly under the size where the HP pin pushes against the seat, and glue the whole chamoodle down with the aircraft grade epoxy. 24 hour later it should be dry, USe Bryans method of resurfacing the seat to take off any excess and make sure it is flat, then try it out.

figure sometime within the next couple of weeks I will finish this off.

[pescador775]

How many people actually dive a double hose when using an oxygen mixture above 36% ?

Let us know what you find out in your research on the seat material for the DA I have been working with a specialty manufacturing company on this subject for a couple of months now....I don't have the final details worked out yet or I'd say more about it.

If it is oxygen safe you know it is nitrox safe. Nylon seats don't age well, they swell, crack, extrude, you name it. I rap on the stuff because I've had trouble with it in my compressor systems and in scuba valves. It is not as bad as the US divers phenolic seats but not much better either. There are several different compounds of nylon so it may be that one is better than others. Teflon will resist any common solvent, most chemicals in fact. Because of its lubricity it is super easy to form a tight seal. Some of the reasons I like the stuff.

[Bryan]

[captain]

Will do. I am,picking up about a foot of rod Nylon and teflon, it will have to turned down to the right diameter. I have a small unimat lathe that will do this nicely. The I anticipate cutting a one inch section and drill a hole down the middle the same size or slightly under the size where the HP pin pushes against the seat, and glue the whole chamoodle down with the aircraft grade epoxy. 24 hour later it should be dry, USe Bryans method of resurfacing the seat to take off any excess and make sure it is flat, then try it out.

figure sometime within the next couple of weeks I will finish this off.

Once the seat material is in I would face it with the unimat. I have refaced several DAAM seat on my lathe and it is not near as precise as a unimat.

[treasureman]

Had not thought on using the unimat to face it. Will take some experimenting on some scraps fiorst though dont want to deatroy some old brass HP housings