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Did you know: Armstrong Humid-A-ware Software includes humidifier load calculations, psychrometric calculations and comparisons, and ASHRAE de
Direct-Acting Pressure-Reducing Valves
The simplest of pressure-reducing valves (PRVs), the direct-acting type operates with either a flat diaphragm or convoluted bellows. Since it is self-contained, it does not need an external sensing line downstream to operate. It is the smallest and most economical of the three types of PRVs and is designed for low to moderate flows. Accuracy of direct-acting PRVs is typically +/- 10%.