0828330 (Watts) | 4 In Cast Iron Process Steam Pressure Regulator | Adjustable | Flanged Connections | Model 208This 4 Inch Process Steam Pressure Regulator, Model 208, is a Single Seated, Direct Acting, Diaphragm Type Regulator. It is Ideal For Institutional, Industrial, And Commercial Applications to Regulate Steam Pressure in The Mainline And High Capacity Process Service Heating Applications. It Features a Cast Iron Body, Flanged End Connections, Stainless Steel Diaphragm, Seat And Disc Internals to Extend The Service Life. The Springs And Diaphragm Chamber