Normally closed. Direct acting. No minimum differential pressure to operate. Body: bronze, stainless steel, etc.BSP or NPT threaded connections.Stainless steel type closure (s).PTFE seat closure (t).Class H coil coated with glass fibre and isolating impregnation. Output cables for splicing (s version).Internal use housing with an outlet for electric connector (s version).Encapsulated coil. Shape A DIN 43650 connection (t version).Core tube: 304 s.s. Core spring: 302 s.s. Core: 430 F s.s.Shading coil: copper (brass body) silver (s.s body).