SP R109 seat condition bad?
- Thread starter ericpitar
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pescador775
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It looks kinda knarly. Use a diaphragm depressor with the next seat.
R
redacted
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That's the grand canyon I was talking about. But it is quite possible you could still get it to seat but cracking pressure might be higher than you would want. That seat is the same seat used in an R190, Just in a different poppet. Those seats can be removed from the poppet (there may be a little rubber cement holding it in place) and turned over for a fresh seating surface.
I store all my SP metal regs with the purge button slightly depressed to delay that level of engraving.
I store all my SP metal regs with the purge button slightly depressed to delay that level of engraving.
You can probably flip the seat over and use the other side. Keep the poppet, SP has started sending only the new seat in the annual service kit, not the whoel poppet.
A quarter works great as a purge depressor in the R109 - just slip it in between the metal and rubber purge covers.
A quarter works great as a purge depressor in the R109 - just slip it in between the metal and rubber purge covers.
Thanks all. Would keeping the purge cover depressed during storage negatively affect the reg (maybe the spring specifically) in some way?
If using a quarter, this implies the cover won't be depressed evenly, correct? Would this "warp" the rubber cover and/or diaphragm? I'm thinking of cutting a piece of cardboard to slip in two opposite sides of the purge cover....or maybe use 2 quarters....
If using a quarter, this implies the cover won't be depressed evenly, correct? Would this "warp" the rubber cover and/or diaphragm? I'm thinking of cutting a piece of cardboard to slip in two opposite sides of the purge cover....or maybe use 2 quarters....
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No, it just keeps the seat off the orifice. The spring is only slightly loaded and is not negatively affected.
Packhorse
Contributor
Any idea what the seat is made of?
Could you just punch one out of some EPDM or Neoprene? ( I have a sheet of each 1.5mm thick)
Could you just punch one out of some EPDM or Neoprene? ( I have a sheet of each 1.5mm thick)
Depressing the purge for extended periods of time will not affect the spring, but I am not so sure about the diaphragm cover.
I have seen diaphragm covers that have been left depressed for long periods of time (years) with the paddle that Scubapro used to provide for this purpose and the rubber cover has taken a set.
Replacements for those diaphragm rubber covers are sometimes still available, but I believe they will become much harder to obtain in the future. On the other hand, replacements for the seats should be available long into the future since they are shared by other Scubapro regulators that are still in production.
Therefore, IMHO I prefer to sacrifice the seat than the diaphragm cover. I have also changed most of my 109 (and I am in the process of converting the rest) to balance adjustable since the lighter springs tends to wear less on the seat.
I have seen diaphragm covers that have been left depressed for long periods of time (years) with the paddle that Scubapro used to provide for this purpose and the rubber cover has taken a set.
Replacements for those diaphragm rubber covers are sometimes still available, but I believe they will become much harder to obtain in the future. On the other hand, replacements for the seats should be available long into the future since they are shared by other Scubapro regulators that are still in production.
Therefore, IMHO I prefer to sacrifice the seat than the diaphragm cover. I have also changed most of my 109 (and I am in the process of converting the rest) to balance adjustable since the lighter springs tends to wear less on the seat.
pescador775
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Again, use a diaphragm depressor. It presses against the diaphragm of the 109, not the cover; it is anchored by the cover and has no effect except to spare the seat. The depressor can be left in place for 20 years and not hurt anything. Stop making this hard. Try what AWAP and Aquamaster recommend or go cheap, DIY, whatever and make a seat using a hollow punch.
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