The Crosby Valve & Gage Co 961101FA 300PSIG UVNB Ammonia Relief Valve JMBL61CA is a high-quality valve designed for industrial use. With a maximum pressure rating of 300 PSIG, this valve is suitable for regulating the flow of water in various hydraulics and plumbing systems. Manufactured by Crosby Valve, a trusted brand in the industry, this relief valve ensures reliable and efficient performance for your application needs.