The McDonnell & Miller 250-3 ASME relief valve is a 3/4" NPT pressure-relief device with a 30 psi set pressure, designed to provide ASME-compliant overpressure protection for pressure vessels. It features a standard 3/4" NPT connection for straightforward installation in compatible piping. As the 250-3 model, it offers reliable relief performance at a 30 psi setting for boilers and related equipment that require precise, code-approved safety relief.
