A device for flushing a hydrant includes a stem connected to a fluid valve of the hydrant and an actuation system including a biased translational system coupled to the stem, a compressed gas, and a normally-open gas discharge valve. An actuation system for flushing a hydrant includes a fluid, a pis
A device for flushing a hydrant includes a stem connected to a fluid valve of the hydrant and an actuation system including a biased translational system coupled to the stem, a compressed gas, and a normally-open gas discharge valve. An actuation system for flushing a hydrant includes a fluid, a piston assembly movable by the fluid, a manual bleed valve in communication with the fluid, and a biasing element at least indirectly biasing the piston assembly towards a stop position.
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1. A device for flushing a hydrant comprising: a stem connected to a fluid valve of the hydrant; andan actuation system including: a biased translational system coupled to the stem;a compressed gas;a normally-open gas discharge valve;a normally-closed gas intake valve anda hold down assembly coupled
1. A device for flushing a hydrant comprising: a stem connected to a fluid valve of the hydrant; andan actuation system including: a biased translational system coupled to the stem;a compressed gas;a normally-open gas discharge valve;a normally-closed gas intake valve anda hold down assembly coupled to the stem and defining a pressure cavity in fluid communication with the normally-open gas discharge valve and the normally-closed gas intake valve, the pressure cavity including a piston plate within the pressure cavity. 2. The device of claim 1, wherein the gas discharge valve includes a solenoid and a pneumatic valve, the pneumatic valve closable by the solenoid. 3. The device of claim 1, wherein the hold down assembly includes a stem body defining a bias cavity and the pressure cavity, wherein: within the bias cavity, a biasing element of the biased translational system is seated; andwithin the pressure cavity, a piston assembly includes the piston plate, a cylinder body, a bottom plate, and a bottom plate stop, wherein the piston plate separates the pressure cavity into a top chamber and a bottom chamber, wherein the top chamber and bottom chambers are sealed, and wherein the top chamber is in fluid communication with the normally-open gas discharge valve and the normally-closed gas intake valve. 4. The device of claim 1, wherein the actuation system includes at least one gas container. 5. The device of claim 1, wherein the hold down assembly includes a stem body coupled to the stem. 6. The device of claim 5, wherein the stem body defines the pressure cavity. 7. The device of claim 6, wherein the stem body includes a piston assembly within the pressure cavity, the piston assembly including the piston plate. 8. The device of claim 1, wherein the biased translation system includes a biasing element. 9. The device of claim 8, wherein the biasing element is a spring, the spring surrounding the stem. 10. An actuation system for flushing a hydrant comprising: a fluid;a piston assembly movable by the fluid, the piston assembly including a piston plate within a pressure cavity defined in a hold down assembly;a normally-open fluid discharge valve in fluid communication with the pressure cavity;a normally closed fluid intake valve in fluid communication with the pressure cavity;a manual bleed valve in fluid communication with the pressure cavity; anda biasing element at least indirectly biasing the piston assembly towards a stop position. 11. The actuation system of claim 10, wherein the manual bleed valve is a manual piston purge valve. 12. The actuation system of claim 11, wherein the manual piston purge valve is openable by a wrench. 13. The actuation system of claim 10, wherein the hold down assembly is mountable on a hydrant. 14. The actuation system of claim 10, wherein the fluid is compressed gas. 15. The actuation system of claim 14, further comprising at least one gas container. 16. A method of flushing a hydrant comprising: operating an actuation system coupled to the hydrant, the actuation system including a compressed gas, a normally-open gas discharge valve, a normally-closed gas intake valve, a piston assembly coupled to a stem of the hydrant and including a piston plate within a pressure cavity defined in a hold down assembly, the pressure cavity in fluid communication with the normally-open gas discharge valve and the normally-closed gas intake valve, and a biasing element coupled to the stem, the stem connected to a fluid valve of the hydrant;closing the normally-open gas discharge valve; andopening the fluid valve of the hydrant by pressurizing one side of a piston plate of the piston assembly with the compressed air. 17. The method of claim 16, further comprising closing the fluid valve of the hydrant by opening the normally-open gas discharge valve, wherein opening the normally-open gas discharge valve releases pressure from against the one side of the piston plate. 18. The method of claim 16, wherein the piston assembly is mounted within a pressure cavity defined within a stem body coupled to the stem. 19. The method of claim 16, wherein opening the fluid valve includes opening the normally-closed gas intake valve of the actuation system. 20. The method of claim 16, wherein the normally-open gas discharge valve includes a solenoid, and wherein closing the normally-open gas discharge valve includes powering the solenoid.
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이 특허에 인용된 특허 (14)
McCarty Wilfred L., Automatic flush system for water lines.
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