Model 3590 is a single-stage, stainless steel diaphragm, stainless steel bar stock body regulator. This model also has 2 in. stainless steel gauge, a one-piece encapsulated seat design with internal filter and PTFE Teflon® seat. Designed specifically for applications demanding extremely high gas flows at low incoming pressures. The Model 3590 features eight functional body ports: two 1/2 in. NPT and six 1/4 in. NPT allowing for a wide variety of inlet/outlet and gauge location configuration. This model is rear-panel mountable. For use with atmospheric or mildly corrosive gases.