Analysis of the letter difference between the normally open and normally closed German Festo FESTO solenoid valve

1、 German Festo FESTO solenoid valve letter meaning

The normally open and normally closed state of the German Festo FESTO solenoid valve is usually represented by letters, where NO is the abbreviation for Normally Open, indicating normally open; NC stands for Normally Closed, which means normally closed. The difference in letter meanings indicates the switching characteristics of solenoid valves in different states.

2、 Wiring method

The wiring method of the normally open and normally closed German Festo FESTO solenoid valve is also different. The two ends of the coil of the normally open solenoid valve are connected to the power supply. When the coil is energized, the solenoid valve closes; When the power is cut off, the solenoid valve opens. The two ends of the coil of the normally closed solenoid valve are connected to the power supply. When the coil is energized, the solenoid valve opens; When the power is cut off, the solenoid valve closes. The difference in this wiring method reflects the connection method of the circuit of the solenoid valve in different states.

3、 Working principle

The working principle of the normally open and normally closed German Festo FESTO solenoid valve also differs. The normally open solenoid valve is open in its initial state. When the coil is energized, the solenoid is attracted and the valve is closed, forming a path. When the power is cut off, the electromagnet is released and the spring pushes the valve to open, forming an open circuit. When there is no external voltage, the normally closed solenoid valve is in a closed state, forming a passage. When the coil is energized, the electromagnet attracts, the valve opens, and the passage is disconnected. When the power is cut off, the electromagnet is released and the valve closes to form a path again. By comparing the working principles, we can gain a deeper understanding of the differences between normally open and normally closed solenoid valves.

4、 Other differences

When using the normally open and normally closed German Festo FESTO solenoid valve, there are some other differences that need to be noted. For example, normally open solenoid valves are generally used in applications to control the passage of gases or liquids; And normally closed solenoid valves are used to control the cutoff of fluids. In addition, the coil current of normally open solenoid valves is relatively small, while the coil current of normally closed solenoid valves is relatively large.

In general, the difference between the normally open and normally closed letters of the German Festo FESTO solenoid valve indicates the switching characteristics of the solenoid valve in different states. This article elaborates on the wiring method, working principle, and other aspects to further help readers understand the difference between normally open and normally closed solenoid valves. In practical use, it is necessary to select the appropriate type of solenoid valve based on specific application scenarios and requirements.

1、 German Festo FESTO solenoid valve normally open and normally closed letter difference

In fluid control systems, the German Festo FESTO solenoid valve plays a role in automatic regulation, safety protection, and remote control. Normal Open (NO) and Normal Closed (NC) are the two working states of solenoid valves. Normally open means that the valve is open when not powered on, and closed when powered on; Normally closed, on the contrary, the valve is closed when not powered, and only opens when powered on. The choice of these two states mainly depends on process requirements and system safety considerations.

2、 The method of changing the normally open German Festo FESTO solenoid valve to a normally closed solenoid valve

Converting a normally open solenoid valve to a normally closed solenoid valve theoretically requires hardware replacement, as the internal structure and working principle of normally open and normally closed solenoid valves are different. But in certain specific situations, similar functions can be achieved by adding peripheral control circuits. Simply put, it is to add a relay to the control circuit of the solenoid valve, and change the working state of the solenoid valve by controlling the on/off of the relay. This method requires professional operation and ensures circuit safety.

3、 The method of changing the normally open valve of the German Festo FESTO solenoid valve air valve to a normally closed valve

Air valves are commonly used to control the opening and closing of ventilation systems. If a normally open air valve needs to be changed to a normally closed air valve, it is generally necessary to replace the entire valve device because the internal mechanisms of normally open and normally closed air valves are different. If the on-site conditions do not allow for the replacement of the entire device, it may be considered to add electric or pneumatic actuators to achieve the normally closed function of the valve through the control system.

4、 Method of changing the normally open valve of the fan valve to a normally closed valve

The modification of fan dampers is similar to that of ordinary dampers, but it should be noted that fan dampers usually bear greater pressure and air volume. Therefore, when modifying, it is necessary to ensure that the normally closed valve selected can withstand the corresponding working load. At the same time, during the modification process, it is necessary to ensure the stability and safety of the fan system, and avoid any performance degradation or safety hazards caused by the modification.

5、 Precautions for retrofitting normally open German Festo FESTO solenoid valve

When modifying the normally open German Festo FESTO solenoid valve to a normally closed German Festo FESTO solenoid valve, in addition to the circuit safety and valve selection mentioned above, the following points should also be noted:

Before modification, it is necessary to fully understand the working principle and performance parameters of the original German Festo FESTO solenoid valve to ensure that the modification will not affect the normal operation of the system.

When selecting an alternative normally closed solenoid valve, it is necessary to consider that its operating voltage, current, pressure, flow rate, and other parameters match the original solenoid valve.

During the modification process, strict adherence to circuit safety regulations is necessary to avoid situations such as short circuits and overloads.

After the modification is completed, a detailed test should be conducted on the German Festo FESTO solenoid valve to ensure that its working condition meets expectations.

In short, the selection and modification process of the normally open and normally closed FESTO solenoid valve in Germany need to be based on specific application scenarios and system requirements.

During the modification process, safety factors and performance requirements should be fully considered to ensure that the modified solenoid valve can meet actual needs.