The Apollo Conbraco Industries 1-1/2" Relief Valve is designed for pressure regulation in fluid systems, with a maximum pressure rating of 145 PSI. This valve features a cast iron body and flange connections for easy installation. Its unique design allows for reliable operation in various applications, including HVAC and industrial processes. The valve is compliant with ANSI standards, ensuring safety and performance. With its durable construction and efficient design, this relief valve is an essential component for maintaining system integrity and preventing overpressure situations.