Pressure Seal Gate Valves Class 1500 are specifically designed for high-pressure and high-temperature services where superior sealing performance and operational reliability are essential. The pressure seal bonnet design utilizes the internal line pressure to enhance the sealing force between the bonnet and gasket, providing a more effective and secure seal as pressure increases. Featuring a full-port construction, flexible wedge gate, and OS&Y (Outside Screw & Yoke) design, these valves deliver low pressure drop, bi-directional sealing, and long service life. They are widely used in power plants, steam systems, refineries, petrochemical facilities, and other critical industrial applications