Pressure in the pumping station: setting, adjustment and control

In this article you will learn what a pumping station is, what the design of a pumping station is, the principle of operation of a pumping station with a hydraulic accumulator, how to adjust the pressure in the pumping station.

Pumping station for a private house - what is it, what is its design

A pumping station is a complex system of devices for supplying water to a home and increasing pressure in the pipeline. A standard pumping station with a hydraulic accumulator consists of 5 elements:

1. Electric motor
2. Pump
3. Hydraulic accumulator
4. Pressure gauge
5. Pressure switch

All elements of the pumping station are connected to each other by pipeline or other means, and the pumping station is also connected to the water supply pipes of the house and a pressure pipe.

How does a pumping station work?

Water from the source goes through a pipe to the station itself. The angle of inclination of the water supply pipe must be greater than one degree.

The liquid enters the centrifugal pump, which is rotated by the station’s motor. He pumps water from the source and raises it higher. From there it diverges to the hydraulic accumulator and the water supply system of the house.

Water completely fills the entire volume of the station, hydraulic accumulator and pipe system. The pump pumps water, increasing its pressure in the pipeline.

Water presses on the membrane of the pressure switch. It contains a membrane, which, at the selected pressure, presses on the spring, opening the circuit and turning off the pump.The pressure gauge measures the pressure inside the system.

Water also presses on the flexible membrane of the accumulator - two-thirds of its internal volume is filled with air, which is separated from the water by the membrane.

In a closed system, water presses on the membrane, and air through it presses on the water. When water is used/opened, air is pushed out.

This reduces the water pressure, which presses on the relay membrane. The relay closes the circuit and the pump starts, pumping water until the pressure rises again and the circuit is closed.

How to adjust the pressure in a pumping station. Adjusting the pressure switch. How the pressure switch works in a pumping station. Operating principle of a pressure switch.

The pressure switch in the pumping station consists of seven elements:

1. Bases/cases
2. Flange for water
3. Nuts for regulating pressure difference
4. Nuts for pressure regulation
5. Terminals for electric motor and ground terminals
6. Cable coupling
7. Membranes

How does a pressure switch work in a pumping station?

Water from the pipeline enters the flange where the membrane is located. The liquid presses on her. When the pressure reaches a certain value (measured mechanically), the membrane presses on the piston with a spring. Because of this, the contacts open and the electric motor turns off.

When the pressure in the system drops, the user uses water: opens the tap - the membrane releases the piston and the contacts close. The electric motor turns on. It rotates the pump, which pumps water from the source until the pressure rises to open the contacts.

To adjust the pressure switch in the pumping station:

• Measure the pressure in the pipeline before starting work.
• Disconnect the pumping station from the power supply.
• Drain the water from the system - open the tap.
• Disassemble the pressure switch housing - unscrew the corresponding bolts with a wrench.
• Rotate the large spring nut clockwise to increase the firing pressure. Unscrew for the opposite result.
• Rotate the smaller spring nut clockwise to increase the difference between cut-in and cut-out pressures. Rotate in the opposite direction to reduce the difference.
• Connect the station to the power supply.
• Wait for water to fill the system.
• Measure your blood pressure.
• If all is well, assemble the relay housing.

Pressure difference in a pumping station - what is it? We figured out how the relay works in the pumping station - at a certain pressure it turns off and turns on.

That is, the pump will pump water into the system until there is a conditional 2.3 bar. Then you will waste water, and the pressure will gradually decrease to a conventional 1.2 bar. Then the pump will turn on again and run until 2.3 bar is reached again. The maximum pressure difference in a domestic pumping station is 1.1 bar. The difference is adjusted by rotating the nut of the smaller spring. The maximum values ​​in domestic pumping stations are 3.3 and 2.2 bar.

The smaller the pressure difference, the more stable the water pressure and the faster the wear of the equipment.