Regulators – Pressure Regulator – GP & L Series Regulator The GP Series are for are used for steam, air or gas service. They have a 95% accuracy of regulation. Since the GP series has few moving parts, which require minimal maintenance, the GP Series regulates pressures up to 600 PSIG at 600°F. The L Series are also used for steam, air or gas service. They have a 99% accuracy of regulation. One valve adjusts to all ranges and the L Series regulates pressures up to 600 PSIG at 750°F. If you would like additional information, please click on any literature link below or Contact Us directly so that we may provide you with detailed specifications. Solutions Balance of Plant Boiler System Condensate Systems District Heating Main Steam System Process Control Process Heating Brands Leslie Controls Literature Regulator Handbook PDF Size: 1.1MB