| 摘要 |
An adjustable pressure regulator for controlling the delivery of a gas from a high pressure source to a lower pressure device at a predetermined pressure is provided. A piston, spring and insert work with pressurized gas to open and close the pressure regulator, allowing or interdicting the flow of gas. In an open state, the spring forces the piston away from the insert allowing pressurized gas to flow into the system. Downstream back pressure, against the piston, overcomes the force of the spring and forces the regulator to close at a predetermined gas pressure. Regulator closing pressure is determined by the biasing force of the spring and distance between the piston and insert. The position of the insert, relative to the piston, is adjustable such that the distance is increased or decreased resulting in the concomitant increase or decrease of pressure to the downstream device.
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