Triple 44's?

[pescador775]

You can't put a restrictor inside the hose, the pressure is too low. The device is made from a thin stainless steel disc, pierced with a small drill and inserted in the regulator HP orifice. If flat, a thin teflon ring must be inserted between the disc and filter. The intermediate pressure may have to be adjusted.

The Nemrod valve arm has to be turned down on a lathe. It is possible to do on either end. However, if the outboard arms are shortened if is necessary to fabricate a replacement end stop and braze it to the arm.

All unbalanced diaphragm reducing valves breath easier at low tank pressures. This is a "tell" that pressure is getting low. However, when breathing finally becomes difficult there is enough gas left in the tank to support breathing on the way up. This is not always so with modern, high performance regs with certain tank valves such as the Sherwood 5000.

 

[John C. Ratliff]

...All unbalanced diaphragm reducing valves breath easier at low tank pressures. This is a "tell" that pressure is getting low. However, when breathing finally becomes difficult there is enough gas left in the tank to support breathing on the way up. This is not always so with modern, high performance regs with certain tank valves such as the Sherwood 5000.

The UDS-1 is definately this kind of a valve. It probably has wider openings than any valve ever manufactured. Since the second stage is inside the valve, it would be possible to insert a restrictor orifice in this area (behind or before the sintered filter, which is also interior to the valve). However, I like the way it is set up, and simply keep the J-Reserve in the functioning position.

The Healthways regulators used to have a restrictor orifice in them, and you could order them that way (for use without a J-Reserve valve). It definately gives notice when you suck air, and the diaphragm simply goes all the way in as some small amount of air comes out unless you ascend.

SeaRat

 

[pescador775]

John, remember the old Divair with aluminum maincasting? In 1955, due to corrosion problems, they changed the part to plastic. Now, what, 50 years later, there is a French Frog guy on the "general equipment" board who has an aluminum MK 25 which is corroding away. Deja vu all over again (Yogi Berra).