Air pressure tank for the fire water pressurization system
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This post was last edited by li*ch1968 on 2010-9-29 at 19:24. There is currently a fire water pressurization system equipped with 2 electric main pumps, 2 diesel pumps, and 2 pressure stabilizing pumps, all of which are connected directly to the system’s fire protection network. Some people have suggested that a pressure tank must be added after the pressure stabilizing pumps (it was not included in the original design), otherwise the system will not pass the inspection. I would like to ask fellow experts whether this suggestion is reliable; are there any relevant standards? Is a pressure tank necessary?
What you’re referring to is called a pressure stabilizing tank; it contains a diaphragm with a preset pressure, and it is connected to the outlet of the booster pump. Here we call it an automatic variable-frequency fire protection pressure boosting and stabilizing device. When the pressure in the system’s pipeline network falls below the set value, the diaphragm tank releases the liquid it stores, thereby ensuring that the pressure in the pipeline network remains stable； The booster pump operates at variable frequency. Reference for the original poster ； Design institutes generally design it this way
Reply to 2# QQNeverGivesUp: It is believed that either using a pressure stabilizing tank or having the booster pump operate in variable frequency mode can ensure the pressure in the system’s piping network. If a pressure stabilizing tank is used, is it still necessary to have the booster pump operate in variable frequency mode? I don’t have a pressure stabilization tank here either, and there’s no mention of the pressure stabilization pump needing to be variable-frequency
It is not mandatory, but the pressure stabilization pump should be a variable-frequency pump, and it should operate no more than 6 times per hour. Since the pressure stabilization pump and tank are standard components in the design drawings, they are all installed quite frequently
It is best to use a pressure tank for pressure stabilization, as variable frequency systems have lag effects.
The pressure stabilizing pump supplies water to the fire protection network and the air tank. When the pressure reaches 0.8 MPa, the pressure stabilizing pump stops operating, and it is the air tank that supplies water to the fire protection network through the force of compressed gas. When the pressure drops to 0.7 MPa, another pressure stabilizing pump starts automatically to supply water; once the pressure reaches the upper limit of 0.8 MPa, that pump stops again. This process repeats itself, with the two pressure stabilizing pumps taking turns in operation, thereby keeping the pressure in the network between 0.7 and 0.8 MPa