Diaphragm  Pressure Tanks and   Bladder Pressure Tanks are very similar together, are more compact and have a rubber diaphragm that is fixed or re-changeable in place separating the lower section of water from the upper section of compressed air. As water is pumped into the tank, the diaphragm pushes up into the compressed air section until the preset water pressure level is met and the pump shuts down. This will help maintain a steady water pressure downstream in your house. As users draw water from the system, the diaphragm or balloon then pushes back down (keeping steady system water pressure) until the overall water pressure falls to the point where the pumps comes back on to rebuild pressure once again. Setting the compressed air level correctly is critical to optimal pressure tank performance.
The size of the tank is important. Pressure tanks are available in various sizes and choosing one big enough for your demand is important.
A tank too small will result in too many pump cycles.
Constantly cycling a pump (turning on and off) is not good for the life of your pump.
Therefore, a bigger tank is better as it means you will have both more stored water on hand and run your pump less often.
Figuring the appropriate size of tank is a calculation based on your demand. The alternative is to have your local Tank provider do the calculation. Your only concerns are getting a fair price and ensuring you don’t end up with a tank that is greatly oversized.
Knowing what pressure to set.
The amount of pressure in your Pressure Tank is important.
This will impact both the cycle time for your pump as well as the amount (volume) of water you have to play with between cycles.
Generally you want the pressure for the tank to be 2 bar less than the ‘start’ pressure setting for the pump.


go top