| 摘要 |
PURPOSE: To provide reliable sealing in normally allowable ranges of operating temperatures and pressures by enameling a housing, a shaft, and a head, providing the head with a polished seat face, and providing an actuation device for opening and closing a valve. CONSTITUTION: A corrosion resistant enameled valve is provided at the nozzle 19 of a reaction vessel and effects sufficient sealing for a long time in a fire. A housing 1 is enameled along its interior wall part and is enameled also on its outer surface and provided with a valve shaft 3 having an enameled valve head. A valve head 4 has a polished seat face 4a, which is formed in an annular shape below the valve head 4. A guide groove is provided below a stuffing box and along a valve shaft 3. A handwheel 16 is provided as an actuation device and connected to a screw spindle 24. |
