Gear - Regulators
In an unbalanced first stage, the spring pressure is a constant pushing in one direction, and the gas coming from the cylinder is a variable pushing in the other direction. For example, when the cylinder is at 3000psi, the intermediate pressure might be 135psi, but when it drops to 500psi the IP might be 110psi. On the other hand, in a balanced first stage the gas from the cylinder pushes against (in a piston reg) the piston, but gas also flows through the piston so that it comes around and pushes against the piston in the opposite direction, thus "balancing" it. The spring then determines the intermediate pressure, solely. In this example, IP might be 135 at 3000psi, and 135 at 500psi.
Sludge 2003-04-24 23:42
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