Eliminates the need for energy in the case to prevent fluid flow SD9000 I. Features SD9000-16 / 25P eliminate water hammer piston: Valve Co., Ltd. Shanghai, the first to eliminate water hammer water hammer eliminator Stainless steel piston absorb water hammer manual Model effectively eliminates all kinds of irregular water hammer shock waves in the water outside the hammer and fluid transfer system may produce surge occurring, so as to eliminate destructive shock wave, serve the purpose of protection. Second, the principle SD9000-16 / 25P eliminate water hammer piston's inside a closed container gas chamber, the lower end of a piston, when the shock into the water hammer arrester, water hammer wave acting on the piston, the piston will go Yung cavity direction. Stroke and capacity of the gas pressure in the gas chamber piston movement, water hammer wave size of the piston in the gas and the dual role of certain irregular water hammer pressure up and down movement, the formation of a dynamic equilibrium, thus effectively eliminating the irregular water hammer shock wave.