Sherwood SCUBA rep.
Contributor
1. The dry air bleed system is what allows the first stage to sense the ambient pressure. So the answer is yes, it is the mechanism that tells the first stage how deep it is. As you descend ambient pressure increases and more air flows into the chamber until it starts bleeding air. This will increase the IP in the first stage. If the Dry Air Bleed is not functioning on your first stage, take it to your LDS. The service on it is pretty easy.
2. The belleville washers (there is only one spring in the first stage) are what make the orifice a moving orifice. As pressure is reduced in the tank the moving orifice pulls away from the piston allowing the IP to remain the same throughout the dive.
Hope this helped.
2. The belleville washers (there is only one spring in the first stage) are what make the orifice a moving orifice. As pressure is reduced in the tank the moving orifice pulls away from the piston allowing the IP to remain the same throughout the dive.
Hope this helped.