A screw with a knob is then tightened to hold the two items together. In a yoke setup, the opening of the regulator is positioned aligned with the one on the cylinder. The term yoke comes from a less used definition of the word that means to hold two objects together so they move as one, much like a vise or clamp. An “O” ring on the regulator will provide some protection for a metal on metal connection and seal any leaks. The thread of the connection helps secure the two pieces together. When applied to a first stage scuba dive regulator, the regulator will have a portion that screws into the high-pressure tanks valve. It refers to the standard that was created for high-pressure tanks. The term DIN comes from the initials of Deutsches Institut für Normung, the German standardization institute and member of ISO. These words represent two different types of valves on a scuba tank. DIN Vs Yoke image by Thomei08 DIN Vs Yoke They represent design features that you may or may not need. When you are searching for the perfect regulator package you will come across some terms, you might not fully understand. So you will have a hose available for this function. An air integrated will even do away with the need for the pressure gauge.Ī BCD requires a connection to a low-pressure port on the first stage so that you can auto-inflate the air bladders of your BCD. You can now purchase a console with a dive computer and a pressure gauge. The availability of dive computers has offered some options. If there was a third instrument it was normally a compass. A high-pressure hose from the first stage connected to the pressure gauge in the console. Traditionally a depth gauge and pressure gauge were the main components of a console. Divers who dive in harsh conditions often use a regulator similar to their primary as sharing a regulator become less of a priority.ĭivers normally buy a console as part of their regulator package. Normally the octopus is a very basic secondary with a bright color case to be more easily seen. It can also be used in the rare case of a second stage regulator failure. Primarily to be used in an out of air situation with your buddy being the one out of air. The octopus is a back up second stage regulator. The second stage releases the gas on demand at the pressure of your surroundings, in this example at 2 bar/ 29 psi. If you are at 10 meters/33 feet, the pressure around you is at 2 bars/2 ATM/ 29 psi. The hose from the first stage will be pressurized at that 8 to 10 bars (120 to 150 psi) intermediate pressure. The purpose of the second stage is to further reduce the pressure of the gas you are going to breathe to equal the surrounding pressure. The second stage regulator is the device that you breathe from. It will also, reduce the pressure of the gas to about 8 to 10 bars (120 to 150 psi) port it by way of a low-pressure port to your second stage regulator. When you slowly open the valve, the first stage will allow that pressurized gas to pass out of the high-pressure port by a hose to your pressure gauge. You connect your regulator assembly to a full scuba cylinder with 200 bar about 3,000 psi of pressure. The function of the first stage is to reduce the pressure of the gas within the scuba cylinder to an intermediate pressure. There is one and possibly two high-pressure ports and three or more low-pressure ports. The first stage will have multiple ports. The first stage regulator is the part of the regulator assembly that attaches to the cylinder. The Makeup of a Regulator Package A Scuba Diving Regulator First Stage What we do purchase is a first stage regulator, a second stage regulator, an octopus, a gauge/ computer package and required hoses including a low-pressure hose for the BCD. However, when we set out to buy a regulator, we will likely be buying more than just the second stage. We have grown accustomed to calling the second stage regulator as just a regulator. Few divers will ever use the full potential of the higher price one, and many divers will outgrow the least expensive. It is not likely that you will understand the differences between the $200 regulator set and the $1,500 one. As a new scuba diver, buying your first regulator is most likely the most challenging of your new gear purchases.
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