The Type E Main valve is available in Cast Iron and Cast Steel materials, in sizes ranging from 3/8" through 12". Used for pressure regulating for steam distribution, regulating for process control (temperature or pressure), maintaining back pressure or differential pressure. Can be used with self-contained, pneumatic or electronic pilots and has single point as well as multiple use applications. The Type E Main is single seat, normally closed, packless construction, and has multiple trimes for precise sizing.