Piston-type plastic water flow switch controller model EFS-01P,EFS-02P,EFS-03P,EFS-04P

Type A,EFS-01P,must be installed vertically, and the floater floats,the line is connected through the liquid.

Type B,model EFS-02P

Type C,model EFS-0CP

Type D,model EFS-04P, is a special magnetic water flow switch for instant electric water heaters, which can be installed at any angle.

Features:

1. Small flow 0.6L~1.2L/min can start, large flow 6.0L/min start pressure 800pa.

2. It is safe because of reliable to use spring reset.

3. It can be used in fast-heating electric water heaters, which can realize passing water and power-on, water stops and power-off, and so the power saving effect is remarkable.

4. The core components are reed switches imported, which can act more than ten million times, with long life and strong reliability.

Working principle: 

The water flow switch is a very important part in the instant electric water heater. When 0.5L of water flows at the water inlet, the circuit is turned on, and the electric water heater starts to heat; when the water inlet stops, the water heater stops working. The disadvantage of the traditional shrapnel-type water flow switch (mechanical switch): a large flow is required to activate the switch. Moreover, after the switch works for a period of time, there will be wear and tear, resulting in reduced sensitivity or even unable to return, which will not play a safety role, resulting in the danger of dry burning. The maglev water flow switch controls the on-off of the reed switch through the magnet, realizes passive non-contact operation, and achieves safety and reliability.
When the water flow in the pipeline is greater than 1L/min, the magnetic core will be displaced under the action of the water flow and drive the magnetic source to produce a magnetic control effect, so that the sensor outputs a “1” switch signal, which is input to the equipment control system, and is passed through power expansion. After amplification, the purpose of water flow control is realized. When the water flow in the pipeline is less than 1L/min, the magnetic core drives the magnetic source to return to the position under the thrust of the return spring, so that the sensor outputs a “0” switch signal and stops the work of the system. The flow switch has the advantages of high sensitivity and strong durability.

Applications:

Laser beauty instruments, laser engraving machines, instant electric water heaters, and thermal storage electric water heaters can realize water and power off, water and electricity, allowing users to take a bath in a state of no electricity, ensuring absolute safety for bathing. It can also be used in air conditioners, dishwashers and various water and electricity linkage equipment. A water flow switch, also known as a flow switch or flow sensor, is used to detect the flow in the pipe or stop the output signal to protect a product in the system. Its structure and working principle is that a magnetic ring is installed in the piston, and the water pressure pushes the piston during operation. When the magnetic ring in the piston is pushed to the position of the reed switch, the reed switch will generate a signal. This type of switch has stable performance and is widely used in various types of equipment. And some piston-type water flow switches can adjust the working point of the reed switch to change the flow signal, so it is the first choice for all kinds of equipment. Flow switch is used for electric water heaters, solar water heaters, air conditioners and other water systems for water circulation control, water inlet and outlet control, water heating control, water pump switch control, solenoid valve on-off control or water outlet power-off, water outlet power-on control and other processes. A sensor device that converts the water flow into an on-off electrical signal after reaching a certain flow rate. The water inlet and outlet ports are G1/2″ standard pipe threads.

The main technical parameters :

Suitable ambient temperature ≥1℃
Suitable working temperature ≤100℃
Minimum starting flow ≥1L/min
Maximum passing flow ≤6L/min
Rated working pressure ≤0.65Mpa
Maximum housing pressure ≤1.5Mpa
Signal output load DC24V/0.3A, AC36V/ 0.3A or AC220V/0.3 A.

Scope and conditions of adaptation: 

( 1) The ambient temperature is not lower than 0°C. Do not knock the casing. Keep away from magnetic objects.
(2) The output of the signal is a switch quantity, so the connection method of the control object must also be a switch control relationship.
(3) The power of the controlled object shall not be greater than the signal load capacity.
(4) This device is a water medium control device and cannot be used for other medium control.

• The item  is available for retail and wholesale;
• The place of origin is in China,when you buy one or two,please consider freight(by air or by sea) into the cost;
• Accept bulk order with Container delivery;
• Please contact us online (click here) Or send inquiry message to our email:  sale@smartclima.com