DIPPING TUBE SURGE VESSEL/HYBRID TANK

The dipping tube surge vessel operates without an air compressor or internal bladder, instead it uses an air admittance valve on top of the vessel to control the air charge.

This vertical vessel is connected to the pipework through a large connection pipe at the bottom, featuring a compression chamber at the top, delimited by the dipping tube or ventilation tube with a shut-off float valve. Functioning on the principles of air compression and expansion, the dipping tube surge vessel aims to mitigate pressure surges within a water distribution system.

PROCESS

⸺ Standard Operation

Under regular circumstances, the dipping tube surge vessel is partially filled with water, and the air inside the tank is compressed.

⸺ Pressure Surge Event

Instances of sudden changes in water flow rate, such as pump starts or stops, can lead to pressure surges or water hammer within the system, potentially causing damage or disruptions.

⸺ Compression of Air

When the pressure surge reaches the dipping tube surge vessel, the excess pressure gets absorbed by the trapped air inside the tank. The air compresses, acting as a cushion to absorb the sudden pressure increase and thereby reducing the magnitude and duration of the pressure surge.

⸺ Energy Storage

The compression of air results in the storage of potential energy within the compressed air, converted from the kinetic energy of the pressure surge. This stored energy helps prevent damage to the system by effectively storing and releasing excess energy.

⸺ Pressure Stabilization

After the pressure surge passes, the compressed air inside the dipping tube surge vessel gradually expands. This expansion helps to regulate the pressure in the system, preventing abrupt pressure drops or fluctuations. The stored energy is released back into the system, maintaining a more stable pressure profile.

⸺ System Protection

By absorbing and attenuating pressure surges, the dipping tube surge vessel plays a crucial role in safeguarding the water distribution system from water hammer and potential damage. It reduces stress on pipes, valves, and other system components, extending their lifespan and minimizing the risk of failures.