/community-hubs/valves-actuators-regulators/b/vcp-weblog/posts/an-alternative-to-balanced-bellows-in-pressure-relief-valvesPressure relief valves (PRVs) protect pipes, manifolds, and vessels by relieving overpressure conditions. For applications that do not vent directly to atmosphere, PRV designs with metal bellows can eliminate the effects of backpressure, but these devicesen-USTelligent Community 13