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Regulators 1st stage


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What is the difference between 1st stage and 2nd stage regulators?

The first stage and second stage regulators are components of a scuba diving regulator system. Here´s an explanation of their differences:

First Stage Regulator: The first stage regulator is the part of the regulator system that connects directly to the scuba tank or cylinder valve. Its main function is to reduce the high pressure air from the tank to an intermediate pressure and deliver it to the second stage regulator. Key characteristics of the first stage regulator include:

Pressure Reduction: The first stage regulator reduces the high pressure air from the tank, typically around 3,000 psi pounds per square inch, to an intermediate pressure, usually between 125 psi and 145 psi. This intermediate pressure is suitable for breathing.
Multiple Ports: First stage regulators have multiple ports to allow for the attachment of various hoses and devices. These ports may include high pressure ports for gauges and low pressure ports for the second stage regulator, inflator hoses for buoyancy compensator devices BCDs, drysuit inflation hoses, and other accessories.
Environmental Protection: First stage regulators are designed to withstand exposure to water, pressure changes, and harsh underwater conditions. They incorporate features like environmental seals to prevent water entry and mechanisms to balance the internal pressure.
You can buy these 1st stage regulators from these brands: SEAC, Mares, Apeks, Aqualung and Scubapro. In summary, the first stage regulator reduces high pressure air from the scuba tank to an intermediate pressure and delivers it to the second stage regulator, which the diver breathes from. The first stage connects to the tank, while the second stage is the part the diver places in their mouth to receive air.