Water hammer, also known as hydraulic shock, is a phenomenon that occurs in water distribution systems when there is a sudden change in the velocity of water flow.
This change in velocity can result from rapid valve closure, pump startups or shutdowns, or sudden changes in flow direction.
Water hammer manifests as a pressure surge or shock wave that travels through the piping system, leading to potential damage to pipes, valves, and other components.
Description: An open surge tank is an exposed tank that allows air to be in direct contact with the water.
Operation: Air entrained in the water provides the compressibility needed to absorb pressure surges.
Application: Commonly used in systems where space is not a limitation, such as wastewater treatment plants.
2.Closed Surge Tank:
Description: A closed surge tank is sealed, and the air and water are separated by a diaphragm or bladder.
Operation: The diaphragm or bladder acts as a flexible barrier, providing compressibility to absorb pressure surges.
Application: Suitable for systems where space is limited, and there is a need to prevent air contact with the water, such as in potable water distribution systems.
3.Air Chamber:
Description: An air chamber is a simple, vertical pipe installed in the system with an air pocket at the top.
Operation: The air pocket allows for the compression of air, providing a cushion against pressure surges.
Application: Commonly used in residential plumbing systems to reduce water hammer effects.