DN400 waterproof casing 02s404 flexible waterproof casing rigid waterproof casing

Some common sense on how to prevent water hammer in casing. With low wave speed, for a given flow change, the pressure change is proportional to the propagation of wave speed, so reducing the wave speed is always beneficial for controlling transients.
The wave speed can be reduced by the following methods
Incorporating air
Using non-circular pipes
Installing a water hammer eliminator. When the pressure in the pipeline increases, the spring is compressed, thus opening the passage of water, and the water is discharged to relieve the pressure, thus reducing the water hammer pressure
When the pipe diameter is enlarged and the flow rate is limited, the water hammer can be reduced Although the check valve is installed, the size of the water hammer hazard is related to the length of the valve closing time. The faster the valve closes, the greater the water hammer hazard. If the valve closes slowly, the hazard will be smaller. The pipeline valve closing time must be reasonably increased. , operate slowly, and it is absolutely forbidden to suddenly close the valve
Install a relief valve on the pipeline network in accordance with regulations. When the set pressure is exceeded, the valve opens
Set a pressure regulating chamber on a longer pipeline, shorten the length of the pipeline, and reduce the Small phase length can alleviate water hammer
Proper design of each flow-passing component, and timely maintenance and elimination of flexible waterproof casing pipeline operation faults through sound management systems and strict implementation of operating procedures. Generally, the fluid system can be The impact of water hammer is controlled within satisfactory limits.