Model No.: YL-600
Model NO.: YL-600
Water Pump: 2 Units:One Work One Standby
Check Valve: 1 Piece
Working Pressure: 1.0MPa,
Power Supply: 220V,50Hz,Single Phase
Specification: to be practical
HS Code: 842121999
Material for Expansion Tank: Carbon Steel
Safety Valve: 1 Piece
Gate Valve: 1 Piece
Max Working Temperature: 100 Centigrade
Origin: Jiangyin, China
Energy saving principle
According to the water pump working principle: the water flow is direct ratio to the water pump's motor speed, the water pump's lift is direct ratio to the square of water pump motor's speed, and the shaft power is equal to the product of water flow and list, so the shaft power is direct ratio to the cube of motor speed. Therefore, the water pump's power can be changed by the pump motor's speed.
The flow formula: Q∝N H∝N2 KW=Q*H∝N3
Q means flow,N means speed,H means lift,KW means shaft power.
For example: the frequency reduce from 50HZ to 45HZ, then P45/P50=(45/50)3= 0.729, i.e. P45=0.729 P50;
The frequency reduce from 50HZ to 40HZ, then P40/P50=(40/50)3= 0.512, i.e. P40=0.512 P50.
Generally the water pump is determined according to the water supply system's maximum power requirement, but in practical experience, the water supply system doesn't need to work in its maximum power all the time. Normally it adopts throttle valve to control water flow, but the pump motor working in full load all the time, then it wastes electricity consumption. However, after install variable frequency drive to the system, it will work more smooth and stable, to control water supply by adjusting pump motor speed, and earn investment back by electricity saving in low speed running.
The pump motor is output link, the motor speed is controlled by variable frequency AC drive to achieve variable flow with constant pressure control. The AC drive receives signal from PID controller to control the pump motor speed, pressure sensor detects pipe network water pressure and sends signal to PID controller, and adjusts AC drive's output frequency by PID controller, to achieve a closed-loop control system.
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 |
|Inlet and outlet (mm)||Height of device(H)|| Diameter of tank |
| Length of trestle |
| Width of trestle |
|Weight of tank (Kg)|
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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Product Categories : Constant Pressure Water Refilling Device