I tend to agree the seat cannot be flipped over - there may be rubber on the other side, but it is very thin and won't provide a seal.
scuba pro d350 repair guide
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R
redacted
Guest
I tried flipping one (against very competent advise) and it did not work worth a damn. I could see very shallow mold marks on the reverse side but gave it a try anyway. Bottom line was I did get it to seal but it took quite a bit of spring pressure and it was not as breathable as a poorly tuned $59.95 octo.
halocline
Contributor
If you inspect that seat with a magnifying glass you'll find that one side has a backing; it's like they were cut out of neoprene or nitrile sheets that had a stiffener material bonded to one side. At least all the D series seats I've seen were like that.
I've never seen a fully plastic poppet like that other one, and I kind of hope I don't again.
In your photo the dive/predive spring is oriented like my D300s (or at least the one I just looked at) so my guess is that you're looking for the earlier lever. If you have all sorts of time on your hands and are a true glutton for DIY punishment you could try to make one.
I've never seen a fully plastic poppet like that other one, and I kind of hope I don't again.
In your photo the dive/predive spring is oriented like my D300s (or at least the one I just looked at) so my guess is that you're looking for the earlier lever. If you have all sorts of time on your hands and are a true glutton for DIY punishment you could try to make one.
R
redacted
Guest
I'm pretty sure the dive/pre-dive spring is the same on all.
Packhorse
Contributor
This seat ( out of metal poppet) is solid rubber. There is no plastic backing. The front and back are indistinguishable from each other except one has a groove cut into it from the hard seat.
Even upon close inspection with a magnifing glass I cant see any difference.
I suspect this is an out of the ordinary seat?
So how many different levers are there, 3?
D300?
Late D350?
D400 mounted the other way to other D series?
Edit : Found schematics and yes there are 3 different levers. 300, 350 and 400.
Even upon close inspection with a magnifing glass I cant see any difference.
I suspect this is an out of the ordinary seat?
So how many different levers are there, 3?
D300?
Late D350?
D400 mounted the other way to other D series?
Edit : Found schematics and yes there are 3 different levers. 300, 350 and 400.
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There are 4 levers, the D300 lever, the D350 lever and two styles of D400 lever.
halocline
Contributor
halocline
Contributor
It's different than the ones I've seen. If it works, great. Let us know!
Packhorse
Contributor
What caused the demise of the D series regs?
I talked to a service tech today and he commented that it was because they couldnt pass the Euoprean ( CE?) standards in terms of WOB. Which seemed strange to me
I talked to a service tech today and he commented that it was because they couldnt pass the Euoprean ( CE?) standards in terms of WOB. Which seemed strange to me
Texfrazer
Guest
I've never seen a plastic poppet on any of mine (and I agree with mattboy that I don't want to see another one!). I've also never seen a seat that could be flipped, but maybe Packhorse has got something special. Of course, those seats don't have to be changed too often, but if we could find a supplier for flippable seats..... 
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