Honeywell SCBA Demand Valve Assembly is a component of a Self-Contained Breathing Apparatus (SCBA) that regulates the flow of compressed air from the cylinder to the user's mask, delivering it only when the user inhales. This assembly includes a second-stage regulator, often referred to as a Lung Demand Valve (LDV), which reduces the compressed air to a breathable pressure and maintains a positive pressure within the mask to prevent outside air ingress.
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