|
Post by nemrod on Dec 17, 2004 16:53:17 GMT -8
OK, I have been casting about for a double manifold and have come to think that what I want never existed and is simply a figment of my imagination. What might this be you asK?--Ok, well, I am certain that there were once upon a time double manifolds that had one outlet (the main one) centered on the cross bar and a second outlet on the RH side. These as I remember came with and without a J valve. These were late 60s to early 70s and were intended for 2500 service with 3/4 threads. Does anyone recall seeing these are am I making it up? Why am I interested in one--well--for one thing they will work with the small yoke on the Mistral (on the center valve) and secondly they allow a second regulator--a single hose to be rigged on the RH valve for purposes of redundancy. The modern twin manifolds are to thick for many older regs and the valve outlets are on each side--no center outlet. It seems I have dived with buddies with exactly that rig. It seems I also remember that this type manifold was used to allow a 1st stage from a Calypso to power the auto inflator on a BC and provide the SPG HP port and run a second stage for octapus. The single hose 1st stage was often used without a second stage at all since this was pre common use of octapus systems--it simply provided BC/dry suit auto inflate air and the SPG source.
Another question, when did USD intro aluminum tanks and weren't the first aluminum tanks for 2500 PSI service and not 3000?
And last---does anyone know of a high pressure quick disconnect that could be used to install a short whip hose on the high pressure outlet on the tank valve and then QD a SPG while the tank is under pressure. Again, I swear I remember short hoses with QD on the tanks and an SPG fitted with a hose and QD to allow it to be moved tank to tank and not have to be stored under pressure. This of course was used on tanks intended for use with double hose regs without a HP port or with modern equipment to use a console/computer system on more than one regulator without requiring tools.
Does anyone else but me think the equipment made today is basically stupid--not all of it but a lot of it. Nemrod
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Dec 17, 2004 18:21:14 GMT -8
Nemrod To answer your question about todays equip. I can only quip a older fellows comments that related to another field of equip. "Ingenious solutions to non existing problems" Texas
|
|
|
Post by Mistral on Dec 17, 2004 20:01:37 GMT -8
You are thinking of the Sherwood Selpac manifold. I had a couple of these over the years but recently traded my last one to Frogfoot who intends to use it exactly as you describe - double hose reg on the center post and a vintage single hose reg on the right hand post.
They do show up on e-bay periodically and normally go for about $80 to $100 in good condition.
|
|
|
Post by nemrod on Dec 17, 2004 22:42:23 GMT -8
Yes Mistral, Sherwood would have been my guess, thanks. Why don't they still make this stuff, people don't dive any more or something? I had two Y valves that I traded off, would these work with a double hose on a single tank with a single hose reg?--Just curious. I, being older and wiser now, realize more clearly my limitations and thus feel the need to build in redundancy but down to 60 feet or so I would feel OK with a J-valve and nothing else--beyond that I want more redundancy. Nemrod
|
|
|
Post by SeaRat on Dec 17, 2004 22:55:27 GMT -8
The double manifold you describe is a Sherwood Model SVB 4000JD with reserve, or Model SVB 4000 KD with no reserve. The reserve is set at 500 psi.
How do I know this? Well, I have one set up on my twin 42s in the garage right now. I bought it in about 1980 or so, and I'm looking at the Sherwood catelog with them in it. This valve serves exactly what you envision it, and I have taken it one step further. I mounted it backwards, so that the reserve is on my right side, and the second post is on the left, pointing backwards. This way, the left post does not interfere with the double hose regulator on the center post, and the reserve lever cannot be knocked down.
It is a very nice regulator setup for diving double hose regs. I dive my double hose regulators, and still having the redundancy of a second regulator. I also have the LP and HP outlets for an SPG, and my BC inflation system.
The first commercial aluminum tanks from US Divers were 2475 psi, and were rated at 71.2 cubic feet at that pressure. The 1970 USD catelog did not carry any tanks other than steel. Here is what the USD catelog for 1971 said about them:
Well, they were a bit too long, and about six pounds bouyant when full. I had two of them, and weighted them with 12 pounds in fresh water (I don't think I ever dove them as doubles in salt water).
John
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Dec 19, 2004 8:12:40 GMT -8
I bought one of these manifolds from Mistral and got another on ebay. Be careful when mounting a double hose reg as the Hookah fitting tries to hit the cross bar, so the can needs to be cocked a little, at least it does on mine. Another means of gaining a redundant air supply is to use a pony tank. I made up some from old USD Survivair tanks I got off ebay. I put a vintage single hose on it and I got "vintage redundancy" if I am not using the Selpac manifold. John
|
|
|
Post by jamiep3 on Dec 21, 2004 4:21:35 GMT -8
I've got a couple of the Selpac's I'm going to ebay after Christmas, both Non Reserve, if anybodies interested I'd sell outright, leave me a message and I'll get back to you. May be a couple of days getting back due to season.
Happy Holidays,
Jamie
|
|
|
Post by bigdave on Dec 21, 2004 5:03:35 GMT -8
I've got a couple of the Selpac's I'm going to ebay after Christmas, both Non Reserve, if anybodies interested I'd sell outright, leave me a message and I'll get back to you. May be a couple of days getting back due to season. I'd be interested - david.hale@rocketmail.com BD
|
|
|
Post by nemrod on Dec 21, 2004 10:40:00 GMT -8
I've got a couple of the Selpac's I'm going to ebay after Christmas, both Non Reserve, if anybodies interested I'd sell outright, leave me a message and I'll get back to you. May be a couple of days getting back due to season. Happy Holidays, Jamie Well, I would be interested in the other one if it is the dual outlet type. My email is JRWillJr@aol.com. Thanks. Nemrod
|
|
|
Post by jamiep3 on Dec 21, 2004 10:54:27 GMT -8
email on way.
|
|
|
Post by nemrod on Dec 29, 2004 10:15:13 GMT -8
I got the manifold, thanks, it is exactly what I wanted. Of course now I must begin a search for back pack and tanks worthy of it. I think the spacing on this manifold is 8.25 which is larger than what was traditionaly used on steel tanks? but then I really don't remember. In any case I will have to make something work as this is THE valve!!
Not vintage but classic, does anyone know of a parts source for Tekna regulators. That company just simply vanished with no trace it seems. I have three of the darn things, two purchased new by me and a third rescued from ebay, two of them work but the third has a rotted seal on the pilot tilt valve. I have used these at over 200 feet and I could be wrong but I don't think there is a regulator out there that can equal them for sheer performance but they are quirky, jumpy, and behave oddly at times and also shudder at depths less than 20ish feet. The shudder disappears mostly when I use the seconds on my Mares MR12 first stage. They were equipped originally with a Scubapro clone piston 1st and that is how I still use them most of the time.
Maybe there is needed a "classic" board as well. I am just barely able to remember double hoses and stuff as they were well on the out by the time I came of age but I certainly remember the "disco" age of diving!!!lol. Maybe some leisure suit inpired dive skins are in order. Nemrod
|
|
|
Post by John A on Dec 29, 2004 11:43:47 GMT -8
Know how you feel about the Tekna, had the same issues (pro and con) with my Poseidon Odin, super performer but like you say "quirky". Got rid of it and used a MK20-G250 scubapro for bit, did not like it, got a Apeks TX50 and behold, it performs as well as my old odin without the "problems"! Try one.
|
|
|
Post by nemrod on Dec 29, 2004 15:39:40 GMT -8
Yes, I know the Apeks are good regs, just they are kinda big and clunky and well--they--er ---are not old enough for me to interested in them. I think I would issues with using anything designed and made post circa 1985. There is something about going out on a cattle boat with all the DIRs and whatnnots and assorted newbies and my having an eclectic assortment of odds and ends that most of them have never seen much less heard off and then despite their dire warning of certain death dive with the old junk and survive!
|
|
|
Post by John A on Dec 30, 2004 10:46:56 GMT -8
Know the feeling, that is why, with all my new gear, my wing is still my old Watergill retractable bladder (cir 1978) with a seatec power inflator.
|
|
|
Post by bigdave on Dec 31, 2004 17:23:37 GMT -8
I've got a couple of the Selpac's I'm going to ebay after Christmas, both Non Reserve, if anybodies interested I'd sell outright, leave me a message and I'll get back to you. May be a couple of days getting back due to season. Hey Jamie, thanks for sending me the manifold! Now I just need to scare up a couple of 72s.......! BD
|
|