... Control flow, pressure, temperature, etcTwo types: modulating/control type, shut off/on-off typeMediums: Water, Steam, Oil, Acid, etcWide sizes: ... TEM, middle TEM, low TEM, bellows sealing type, jacket insulation type, shut-off control typeWorkshop pictures: That are pneumatic ... type, we also can provide you electric type if you need it.More technical ...