Seawater Pressure Reducing Valve Model 90G-42, UL Listed, Globe Pattern, Proven reliable design, Accurate pressure control, In line service. This valve automatically reduces a higher inlet pressure to a steady lower outlet pressure regardless of changing flow rate and/or varying inlet pressure. The valve pilot control system is very sensitive to slight downstream pressure fluctuations, and will automatically open or close to maintain the desired pressure setting. The downstream pressure can be set over wide range by turning the adjustment screw on the CRD pilot control. The adjustment screw is protected by a screw-on cover, which can be sealed to discourage tampering. These valves are indispensable in any fire protection system. The diaphragm actuated design is proven highly reliable and easy to maintain. They are supplied with internal and external epoxy coating of the main valve wetted surfaces. STANDARD MATERIALS: Body & cover: Ductile iron ASTM A-536, Trim: Bronze seat ASTM B61-Monel trim, Pilot control valve: Cast Bronze with monel trim and SS-316 tubing & fittings END DETAILS: Cast steel ANSI B16.5, PRESSURE RATINGS: 150 class 250 psi max. OR 300 class 400 psi max., ADJUSTMENT RANGES: 15-75 psi OR 30-300 psi, TEMPERATURE RANGE: Water to 180 deg F max.