ZYA-9000 piston absorb water hammer is used to eliminate the pipeline due to a variety of causes water hammer shock protection device piping and equipment from damage. For industrial and mining enterprises, high-rise buildings, power plants and other types of water supply and drainage systems, the use of the upper chamber of the piston in the expansion and contraction of air, so sudden and so on shock buffered solution of the efforts to maximize avoid huge water equipment damage caused by hammer momentum. The device structure is simple, excellent selection, and long service life.