Diaphragm valve PRV-1A

hydraulically-operatedfor controlpipe

The TYCO Model PRV-1A Pressure Reducing Valves, 2 in. to 8 in. (DN50 to DN200), are factory-assembled and fully trimmed valve arrangements for pressure control. They are used on water filled pipes, where it is necessary to reduce a higher inlet pressure to a lower delivery pressure under static and/or residual flowing conditions. The Model PRV-1A Valve is intended to automatically maintain the outlet "set pressure" (static and residual) within a close range, regardless of fluctuations in the higher pressure inlet line or varying flow rates. The Model PRV-1A Valve is provided with a factory outlet “set pressure” of approximately 125 psi (8,6 bar); however, it may be field set to a nominal outlet “set pressure” of 90 to 175 psi (6,2 to 12,1 bar). Typical applications • Within the main header, as shown in Figure 1, supplying wet pipe, dry pipe, deluge, or preaction system risers, and/or a standpipe system supplying hose connections • As part of a sectional floor control assembly, as shown in Figure 2, supplying sprinkler systems, and/or hose stations Features • Eliminates any required bleeding of trapped air from the diaphragm chamber during installation • Accurate pressure control • Epoxy coated internal and external • One piece, one moving par t diaphragm • In-line service • One pilot valve sub-assembly provides for any outlet “set pressure”, that is, 90 to 175 psi (6,2 to 12,1 bar)