| 主权项 |
1. A fluid release valve for configuring between a pump and an outlet pipe, comprising:
a valve housing having an inlet to be coupled to a pump, having an outlet to be coupled to an outlet pipe, configured with a valve housing chamber to provide fluid from the inlet to the outlet when the pump starts pumping, and configured with at least one fluid release orifice to drain outlet pipe fluid flowing back through the outlet and into the valve housing when the pump stops pumping; and a check valve assembly configured within the valve housing chamber to respond to a pumped fluid pressure when the pump is pumping, allow the fluid to flow from the inlet along a first fluid release path through the check valve assembly to the outlet, and stop the fluid from flowing from the inlet along a second fluid release path around the check valve assembly and out the fluid release orifice, and also configured to respond to a fluid differential pressure when the pump is not pumping, stop the outlet fluid from flowing along the first fluid release path through the check valve assembly, and allow the outlet pipe fluid to drain out the fluid release orifice from the valve housing until a fluid differential pressure between fluid inside and outside the valve housing reaches an equilibrium. |
