| 摘要 |
A diaphragm valve is disclosed that is adapted to reduce debris in the flow paths, reduce the water hammer effect, reduce the energy lost during flow, and/or improve bleed operation. The diaphragm valve includes at least two seals that are configured to permit multi-stage sealing of an opening in a diaphragm valve seat. The initial sealing stage blocks some but not all fluid flow through the opening, and the final sealing stage blocks fluid flow through the opening. The use of two sealing stages can reduce the water hammer effect by increasing the time over which sealing occurs.
|
