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A gas pressure reducing valve typically consists of several key components the valve body, diaphragm, spring, and adjustment screw. The valve body is where the high-pressure gas enters and the reduced pressure gas exits. The diaphragm acts as a responsive mechanism that reacts to changes in pressure. It expands or contracts to maintain consistent output pressure by regulating the valve's opening. The spring applies a force that keeps the diaphragm in position, while the adjustment screw allows for fine-tuning of the desired outlet pressure. Together, these components work seamlessly to ensure that gas is delivered at a safe and usable pressure.