This post illustrates a technique for fabricating a custom DIN manifold with relatively minimal machining costs. It is intended for divers who want a manifold system that is not commercially available. The concepts are not limited to doubles and can be used for any combination of Scuba cylinders of the same operating pressure.
This particular example is for an unusual doubles manifold. I used Captain’s technique for band construction, a Scubaboard Member. In this case, I didn’t need a connection for a second DIN regulator. The rebreather valve functions to isolate the secondary cylinder for reserve gas.
In order to use DIN connections on the manifold, I chose a post valve from the OMS V900 Series Low Profile isolation manifold and a standard rebreather valve. The spool was fabricated by drilling two stainless steel DIN plugs and welding in an off-the-shelf flat-faced O-ring sealed Mark VIII O-Seal Tube Fitting made by CPV Manufacturing. You can build a vast variety of manifolds using combinations of these fittings and a little imagination. Just make sure you use a welder certified for high pressure piping.
I chose these fittings because I preferred TIG welding. You could braze this assembly or build it up from a brass or stainless DIN plug, stainless tubing, and a DIN to Yoke Tank Filler Adapter. The DIN adapter would be modified by cutting off the Yoke end and drilling for the tubing.
Attached are images of a doubles manifold I built for Faber LP-45s. The objective was to support progressive equalization in a compact package. Faber LP-45 cylinders are 5.61" OD and there is ½" clearance between the cylinders for an overall width of 11.62". The valves and spool had not been Oxygen cleaned when the photos were taken.
This particular example is for an unusual doubles manifold. I used Captain’s technique for band construction, a Scubaboard Member. In this case, I didn’t need a connection for a second DIN regulator. The rebreather valve functions to isolate the secondary cylinder for reserve gas.
In order to use DIN connections on the manifold, I chose a post valve from the OMS V900 Series Low Profile isolation manifold and a standard rebreather valve. The spool was fabricated by drilling two stainless steel DIN plugs and welding in an off-the-shelf flat-faced O-ring sealed Mark VIII O-Seal Tube Fitting made by CPV Manufacturing. You can build a vast variety of manifolds using combinations of these fittings and a little imagination. Just make sure you use a welder certified for high pressure piping.
I chose these fittings because I preferred TIG welding. You could braze this assembly or build it up from a brass or stainless DIN plug, stainless tubing, and a DIN to Yoke Tank Filler Adapter. The DIN adapter would be modified by cutting off the Yoke end and drilling for the tubing.
Attached are images of a doubles manifold I built for Faber LP-45s. The objective was to support progressive equalization in a compact package. Faber LP-45 cylinders are 5.61" OD and there is ½" clearance between the cylinders for an overall width of 11.62". The valves and spool had not been Oxygen cleaned when the photos were taken.
If you are not experienced with high pressure piping systems consult a craftsman or engineer who is. Any commercial gas supplier or hydraulic systems fabricator can direct you.
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