Using a small spring, designated as P, the difference between the upper and lower pressure, i.e. the cut-off and cut-in pressure, is set. As water is drawn from the hydraulic tank, the pressure changes.
When it reaches the lower mark, the relay contacts will close and the pump will turn on. In the process of adjusting the pressure relay, you will have to fill the hydraulic accumulator a couple of times and then empty it.
Typically, the difference between the cut-in and cut-out latvia mobile database is about two bars. The hydraulic tank's data sheet indicates the maximum pressure for which the device is designed, but there is no point in trying to pump it "to the brim."
When working at maximum values, the elements of the device wear out faster. When setting up the pressure relay, one important point should be taken into account - the difference between the cut-off pressure and the air pressure in the hydraulic accumulator should be about 10%.
Once the accumulator is installed, it must be properly maintained. About once a month, the pressure switch settings should be checked and adjusted if necessary. In addition, the condition of the housing, the integrity of the membrane and the tightness of the connections should be checked.
The most common failure in hydraulic tanks is a ruptured membrane. Constant stretching-compression cycles eventually lead to damage to this element. Sharp changes in pressure gauge readings usually indicate that the membrane has ruptured and water is entering the “air” section of the hydraulic accumulator.
To make sure there is a breakdown, you just need to bleed all the air out of the device. If water starts flowing out of the nipple after it, then the membrane definitely needs to be replaced.
Fortunately, such repairs are relatively easy to perform. To do this, you need to: