A diving regulator is generally a device that reduces the pressure of breathing gases for divers. It most commonly reduces pressurized breathing gas to ambient pressure and delivers it to the diver. An alternative way to regulate gas pressures is to use a dive regulator. More information is available below. Below are some examples:
First stage
Attached directly to the air tank of a diver, this is the first part of a dive regulator. It regulates air pressure prior to it entering the diver's breathing hose. The second stage, which contains a mouthpiece and purge valve, delivers air directly to the diver's mouth and removes waste gases when necessary. These two stages work together to ensure a safe and comfortable dive. What are the differences between them? Read on to learn more.
The first stage is composed of two parts and the second of a plastic material. Both stages have a mechanical control system and a valve to regulate the amount of gas released. The first stage supplies the air for the initial stage while the second stage is for secondary use. The first stage is connected to the rebreather by means of a connector. This connector allows the diver, who is able to share air with his rebreather underwater, to be able to comfortably inhale.
Mouthpiece
A mouthpiece, which is used to control your diving regulator, is an integral part of the diving apparatus. It is a flattened oval tube with a curved flange that fits between your teeth and lips. While you breath, the mouthpiece seals against your inner ear. You can bite the tabs on either end of the mouthpiece to hold it in place. Mouthpieces come in a variety of prices and can be replaced easily. It is important to find the one that best suits your unique mouth and personality.
For long-term storage and frequent usage, the mouthpiece of your scuba regulator should be made of high quality materials. Your mouthpiece's quality will save you time and money. Here's a guide to mouthpieces and regulators. Learn more about maintaining your dive regulator, and how to take care of it. Also, be sure to read our article Do you pick up rubbish while diving to learn more about maintaining the mouthpiece for your regulator.
Exhaust valve
By manually depressing a lever or dial, the diver controls air flow through the regulator. Exhaled air exits the regulator through the exhaust valve, which is one-way. This valve remains closed when the diver is not exhaling, keeping water from entering the regulator. The regulator's second stage is an additional air source. This can be a BCD inflation/deflation tube.
One embodiment shows the regulator and diver's mouthpiece in fluid communication. The diver inhales via mouthpiece 26 a and breathes through the re-located exhaust tube 24 d.
First stage, Diaphragm type
The diaphragm, or first stage, of a dive controller is made up of two parts. A lever sits within the chamber and a diaphragm. This diaphragm pushes in when there is more water pressure. This creates a balance between the pressure of water and the air inside. This regulator prevents water vapor from entering its internal mechanism and is used often by scuba divers.
The two main operational designs of diving regulators are the diaphragm and piston types. Both types of regulators sense water at ambient pressure and deliver air at a pressure similar to the surrounding body. Piston-type regulators are easier to use and more reliable, but have their limitations. Piston-type regulators are more susceptible to freezing conditions, as well as dirty water. Clear water is the best environment for recreational diving.