The manufacturer has always offered bypass valves with optional 2-inch NPT or 2-inch Weld flanges, but they are now available with optional 1.25-inch NPT or Weld, 1.5-inch NPT or Weld and 2-inch Weld Elbow bolt-on flanges. The incorporation of these additional flange styles will increase the versatility and ease the installation of the bypass valves unit. The bypass valves provide exceptionally reliable close pressure control even under widely varying bypass flow conditions. Each valve is designed to open precisely at a preset spring pressure and close smoothly and quietly. The introduction of the new bolt-on flange sizes will give the customers a wider range of configurations to choose from, making the manufacturers bypass valves applicable for more installations.