The Model 5600 pressure regulator pressure relief valve is spring- loaded, self-operated and available in 1″and 2″ sizes. It provides economical control of air, natural gas and a variety of other gases and is built to withstand the most difficult processes and environments. It is offered in both low pressure and high-pressure constructions and designed for inlet pressures up to 1500 psig and outlet pressures from 3 to 500 psig. Model 5600 is well suited for high pressure, high-capacity applications.