Overview
Variable frequency technology has allowed us to vastly improve your home water system by virtually eliminating pressure fluctuations. constant pressure systems use this technology to provide a never-ending supply of constant pressure for your home, allowing your water to do more for you.
Electric's constant pressure systems, the SubDrive family, change the speed of the pump to meet the demand for water, while keeping pressure constant throughout the system.
SubDrive systems use a pressure sensor to detect water pressure, send a signal to the controller and regulate the speed of the pump. Instead of turning on and off when pressure tanks read a certain psi (generally 40 or 60), constant pressure system keeps your tank at one pressure level, providing your home with a never ending steady flow of water.
In a constant pressure system when water demand increases, pump speed increases and when water demand decreases, the pump speed will decrease. To maintain pressure in the most efficient way possible the pump only runs as much as necessary to meet demand. Also, constant pressure systems do not require large tanks for storage; smaller and lighter tanks can be used and even mounted off the floor, saving space.
Compare a conventional well system to a constant pressure system.
Benefits
Electric SubDrive constant pressure systems improve the way you use water and provide added value to your home. SubDrive systems accommodate a wide range of flow demand, allowing your family to use the water they need, when they need it.
With constant pressure capabilities adding on to your home doesn't mean weaker water, shower schedules are eliminated, lawn irrigation isn't a hassle, appliances work more efficiently, water treatment is more effective and space is saved with a smaller tank (well owners).
A Electric SubDrive constant pressure system provides:
Installs in existing water systems. No need for construction.
Smooth, quiet operation
Choice of pressure settings
Built-in pump system protection
Electronic protection features
Works with existing pressure tanks or smaller tanks can be used
Easy installation
So pamper yourself while increasing the value of your home. Add the body shower you've always wanted. Install a sprinkler system or add an extra bathroom. Whatever your water needs, Electric SubDrive systems are up to the task.
Finally, it's possible to run the shower, wash the laundry and water the lawn, all at the same time - with increased and consistent pressure
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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