Title: Scuba Diving Regulators (First and Second Stages)
Headings: How a Scuba Regulator Works
How a Scuba Regulator Works
What a Scuba Diving Regulator Does
The purpose of a scuba diving regulator is to reduce the high pressure air in a scuba tank to a breatheable pressure on demand.
Regulator Terminology
How Regulators Work
The Regulator First Stage:
The Regulator Second Stage:

Content: The first stage of a scuba diving regulator is the part of the regulator that attaches to the tank valve. Second Stage: The second stage of a scuba diving regulator is the part that the diver puts into his mouth. Tank Pressure: The pressure of the air in a scuba tank. Air inside a tank is compressed to a very high pressure in order to carry an adequate supply of breathing gas for a scuba dive. For a frame of reference, pneumatic tools such as those used by mechanics commonly operate at 90 - 140 psi. A full scuba tank is often pressurized to 3000 psi. Intermediate Pressure: The pressure of the air output from the first stage and sent to the second stage.