Private water wells can experience inadequate or low pressure for various reasons:
low water levels
new irrigation system
increased water usage
A conventional well pump will give you a 20 pound variable in pressure, leading to fluctuations in pressure. When you are watering the gardening, showering, and running the dishwasher these fluctuations will occur and can result in loss of pressure.
The constant pressure system will speed up or slow down the pump motor according to water demand. This will allow you to wash laundry, water the garden, and run the shower simultaneously without diminishing water flow.
A constant pressure system operates with a variable frequency drive controller that automatically monitors household demand. Like the cruise control on a car, the variable frequency drive speeds up or slows down the pump depending on your household water requirements. The result is reliable, constant pressure where and when you need it.
The advantages of constant pressure systems:
Support high volume needs
Variable speed monitors demand
Mechanical stress on the pump is reduced
Constant pressure regardless of fluctuation
Saves energy consumption and costs
Save space with a smaller pressure tank as needed
Can easily be expanded for future needs
| model |
Overall Volume (m3) |
Adjusted volume
(m3 |
Inlet and outlet (mm) |
Height of device(H) |
Diameter of tank
Φ1 |
Length of trestle
A |
Width of trestle
B |
Weight of tank (Kg) |
| YL-400 |
0.125 |
0.038 |
25 |
1200 |
400 |
1200 |
700 |
150 |
| YL-600 |
0.4 |
0.15 |
50 |
2000 |
600 |
1500 |
800 |
250.1 |
| YL-800 |
0.90 |
0.35 |
50 |
2500 |
800 |
1800 |
900 |
325.7 |
| YL-1000 |
1.37 |
0.41 |
65 |
2680 |
1000 |
2000 |
1100 |
430.4 |
| YL-1200 |
2.30 |
0.59 |
65 |
2970 |
1200 |
2200 |
1300 |
815 |
| YL-1400 |
3.40 |
1.02 |
80 |
3350 |
1400 |
2400 |
1400 |
1150 |
| YL-1600 |
5.034 |
1.57 |
80 |
3600 |
1600 |
2600 |
1600 |
1367 |
| YL-1800 |
7.06 |
2.12 |
100 |
3600 |
1800 |
2800 |
1900 |
1863 |
| YL-2000 |
9.42 |
2.85 |
100 |
3800 |
2000 |
3000 |
2100 |
2281 |
The Variable Frequency and Speed Regulation Constant Pressure Water Supply System Based on PLC and Fuzzy Control
For solving the problem of poor quality and waste of electric energy coursed by water supply mode of a high water tower and a direct water pump, introduce a constant pressure supply water system, which adopts embedded fuzzy control technology, using PLC and frequency convener as its core. When the system runs, water pressure of the pipe is inputted into the PLC from terminal X0 through pressure transmitter. Comparing the value of measured pressure with its set value, PLC controls the work frequency of the frequency converter by the output signal on fuzzy calculation in order to control rotation speed of water pump and adjust water pressure of the pipe. The real time control performance to the water pressure of water supply system designed in this paper was proved to be all-right according to the experimentation validated. The hard ware module is steady-going and reliable, and the fuzzy controller is proper and valid and can guarantee the better stability of water pressure.
How Constant Water Pressure Systems Work?
Let's say that the system installed is a C.P 75 Sub- Drive 1-1/2 hp (20 gpm ) with a set pressure of 65 psi, as you open up the kitchen faucet which takes approximately 3 gpm the pressure transducer reads the pressure drop and sends the signal to the drive which then ramps up the pump to maybe 1800 rpms, because the demand is only 3 gpm the pump doesn't need to spin any faster to maintain the 65 psi set pressure, as you open up additional faucets creating more of a demand the rpms of the motor speed up to meet the demand and maintain the 65 psi set pressure. As the demand subsides the rpms slow down until the pump go's into sleep mode when no water is being used.
The advantages are the electric that runs the pump is more economical in that it's a 3 phase motor, no pressure fluctuations when water is being used at different locations in the house, the entire system is wall mounted with a small pressure tank which free's up floor space. Constant water pressure systems come in a variety of models ranging from 20 gpm through 90 gpm.
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