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10 07 2021
Can the air pre-charge pressure of the tank be modified |Aquasky

Can the air pre-charge pressure of the tank be modified |Aquasky

Pre-charge pressure refers to the amount of gas (air is used in tanks) in bar/psi that is pumped into a tank prior to installation – usually at the factory. The pre-charge is the “spring” that helps to create water pressure. As the diaphragm fills with water, it compresses the pre-charge. In a 30/50 system, the pump will continue to propel water into the tank until the pressure in the tank reaches 50 psi.


It is possible to modify the pre-charge pressure of tanks with cautions. It is better to ask an expert to carry out the operation. Being aware of the specific features of the system or plant where the vessel must be or is installed.


However, your well tank’s pressure should be set at 2 psi below the pressure switch’s cut-on point. This differs depending on your tank’s pressure settings. Most well tanks come set at 30/50. The cut-on pressure for the well pump is 30 psi, so the pressure of the tank should have a pressure of 28 psi. If your well tank is on a 40/60 pressure switch, your pressure setting should be 38 psi. This pressure represents the tank empty of any water, as when there is water within the tank, the pressure will increase.


It is also important to note that a 20psi separation between the cut-on and cut-off pressure on all pressure switches (for example, 30/50 and 40/60) are much better. If there is too large a gap between the cut-on and cut-off pressure, although your well pump will have less cycle, the high-water pressure can cause stress on your pipes, plumbing, and water fixtures.


If the cut-on pressure is too close to the cut-off pressure, the tank will not be able to store enough water to fulfill your household’s demands.


Even light water usage will cause the pressure to drop and the pump to turn on. A pump that is short-cycling rapidly and frequently is destined for premature failure.