Emerson introduced the Anderson Greenwood Type 84 Pressure Relief Valve (PRV), specially designed to protect tanks and vessels used in hydrogen and other high-pressure gas applications. With Arlon® 3000XT* thermoplastic seating and ASME SA-479 Type S21800 stainless steel spindle material, the Type 84 PRV delivers exceptional leak-tight performance, resistance to embrittlement, optimum seat tightness, high reliability and long service life.
PRVs are frequently used in traditional applications, but they are not designed to handle extremely small molecules at very high pressures. Therefore, they are not ideal for hydrogen gas, which can diffuse into metals and cause embrittlement of PRV internals, increasing the risk of leaks, failures and safety problems.
Courtesy of Emerson.