| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve body separation type butterfly valve facilitating insertion or separation to/from an outer valve box of an inner valve box.SOLUTION: A valve body separation type butterfly valve includes an inner valve box 1 and an outer valve box 2. The outer valve box 2 includes an outer valve box body 20 provided with an inner valve box storage part 21, and a secondary side ring member 3 movable along a valve box inner flow passage F. The secondary side ring member 3 is pressed against the inner valve box 1 stored in the inner valve box storage part 21, and thereby seal surfaces 15, 16, 28, 30 between the inner valve box 1 and the outer valve box 2 are sealed.SELECTED DRAWING: Figure 1 |
