The most common service pressures seen in modern SCUBA tanks are 2640 psi, 3000 psi, 3300 psi, 3442 psi, and 3500 psi. The 2640 psi low-pressure steel tanks are preferred by Nitrox and technical divers who expect to be blending their gases using the partial-pressure method. Most aluminum SCUBA ...
The internal structure of the fixed port design allows for a very direct gas flow through the first stage, providing optimal performance. The fixed port design is also typically the most compact as well as being lower cost when compared to a similar swivel turret design. The most common ...
A typical sport diving breathing gas setup consists of a pressurized gas cylinder (aka 'tank') and valve with either a 'Yoke' or 'DIN' outlet. The yoke valve outlet is by far more common in the US and Caribbean but much of the rest of the world uses the DIN valve outlet. Experienced divers ...
The makers of dive reels and finger spools find themselves "between a rock and a hard place" as they say in cave country. Manufacturers know that for their devices to work properly, the line should only fill about 80% of the spool. Like a cup of liquid filled to the very brim, invariably an ...
The skills required to deploy a finger spool are different than those required to use a typical reel. At first glance the simple spool looks easier, but compared to reels the finger spool requires different specific techniques for successful use. If this is your first finger spool then seek ...
The use of an isolator valve on the manifold cross bar of doubles is a relatively recent introduction in the sport, but their use is now nearly universal in technical diving performed in North America. The idea is that the effect of catastrophic containment failure in the gas path on one ...
In general purpose applications, the lubrication of joining threads will reduce galvanic action between dissimilar metals and when joining tapered threads is useful to reduce galling. This is especially true when the very tight join alone is responsible for providing a seal. Aluminum metal is ...
232 bar:
18L(141 ft3) and 15L(117 ft3) = 8-inch (large);
12L(95 ft3) and 10L(78 ft3) = 7-inch (standard);
7L(54 ft3) and 5L(39 ft3) = 5-inch (small).
In many parts of the world, the most popular SCUBA tank is the steel "12 liter"; the US equivalent is the "HP100". However, in ...
If you are an open circuit diver, it is becoming increasingly common to find yourself on a boat with a rebreather diver; or perhaps you may even get assigned a
rebreather diver as a buddy. Like you, the rebreather diver has been trained to do a few minutes of setup and ...
Dive light batteries have shifted over the years as a result of advances in technology: Ni-Cad, NiMH, and now Li-ion chemistry has replaced previous technology in most rechargeable canister and handheld lights. Lithium-ion is a rechargeable battery technology that offers the advantage of ...
