Pressure Relief Valve
The 447 series is a spring-loaded pressure relief valve developed to protect highly corrosive processes and installations. Features include: sizes from 1 in. to 4 in., orifice F through P; carbon steel body, all wetted parts are PTFE or PTFE lined (inlet and outlet); PTFE bellows protects bonnet area; ASME Sec. VIII – National Board certified capacities.