Festo MFH-3-1/8 7802 Electrical Solenoid Valve AC220V Mechanical Spring Reset

Product Description:

The purpose of the FESTO solenoid valve is to control the switch of liquid and gas pipelines, which is a two position DO control. This valve is usually used to regulate small pipelines. On the other hand, electric valves are designed to provide analog regulation in medium-flow liquid, gas and wind system pipelines, and are controlled by AI. Electric valves can also act as two position switch controls in the management of large valves and air systems.

ELECTROMAGNETIC VALVES

It is important to point out that electromagnetic valves are limited in their use, as they can only be used as switch signals for DO control and to regulate small pipeline flows, typically DN50 and below. In fact, their use is rare in larger pipelines and air systems. In contrast to a motor-driven electric valve, an electromagnetic valve is activated by a coil and, therefore, can only function in the on or off states. When switching, the action time of an electromagnetic valve is short, which makes it ideal for specific applications, but not suitable for others.

ELECTRIC VALVES

Electric valves are much more versatile when compared to electromagnetic valves. One of the main differences lies in terms of the way their drive operates. In the case of an electric valve, the drive is generally achieved by a motor, allowing a certain amount of time to simulate the opening or closing action according to the AI feedback signals provided. Moreover, electric valves can be controlled by DO or AO and are frequently used in larger pipelines and air systems. Additionally, they can be adjusted to work in different scenarios thanks to their modifiable opening or closing time. For instance, electric ball valves are known for having a greater flow coefficient compared to a 25 caliber solenoid valve.

Features:

The FESTO solenoid valve has several key features:

1. External leakage blocking, easy control of internal leakage, and safe use. Other automatic control valves typically have a valve stem that is controlled by electric, pneumatic, or hydraulic actuators. This can cause external leakage due to long-term action of the valve stem dynamic seal. However, electromagnetic valves apply electromagnetic force to the iron core sealed in the magnetic isolation sleeve of the electric control valve, without dynamic sealing, making it easy to block external leakage.
2. The system is simple, easy to connect to a computer, and the price is affordable. The electromagnetic valve has a simple structure and low price, making it easier to install and maintain compared to other types of actuators such as control valves. The composed automatic control system is much simpler and much cheaper. The switch signal control of the solenoid valve makes it very convenient to connect with the industrial computer.
3. Action express delivery, with small power and lightweight appearance. The response time of solenoid valves can be as short as a few milliseconds, making it very quick and responsive. Properly designed solenoid valve coils also have low power consumption and are energy-saving products. The electromagnetic valve has a small external size, which saves space and has a lightweight and beautiful appearance.
4. The adjustment accuracy is limited, and the applicable medium is limited. Electromagnetic valves usually only have two states: on and off, and the valve core can only be in two extreme positions and cannot be continuously adjusted. The adjustment accuracy is still limited to a certain extent. Electromagnetic valves have high requirements for the cleanliness of the medium, and media containing particles cannot be used. In addition, viscous media are not suitable, and the viscosity range of the media suitable for specific products is relatively narrow.
5. There are various models and a wide range of uses. Although electromagnetic valves have inherent shortcomings, their advantages are still very prominent, so they are designed into a variety of products to meet various needs and have a wide range of applications.

Applications:

When selecting solenoid valves, it is important to consider the type of power supply being used. AC power supply is generally more convenient to access. It is important to choose the appropriate AC or DC valve based on voltage specifications. Priority should be given to using AC220V over DC24V. Additionally, the power supply voltage should be within a certain range of tolerance, typically around +10% for AC and ±10% for DC. If it exceeds the tolerance, voltage stabilization measures must be taken or special orders must be made. It is also important to select the rated current and power consumption based on the power supply capacity, paying attention to the high VA value during AC starting.

When selecting solenoid valves, it is important to consider the environment in which they will be used. Maximum and minimum temperatures should be within the allowable range, and if there are any deviations, special orders should be made. In environments with high relative humidity and water droplets or rain, waterproof solenoid valves should especially be considered. For environments with frequent vibrations, bumps, and impacts, special varieties such as marine solenoid valves may be necessary. In corrosive or explosive environments, priority should be given to selecting corrosion-resistant materials based on safety requirements. When space is limited, a multifunctional solenoid valve may be a convenient option for online maintenance.

It is crucial to select the appropriate solenoid valve based on the media being used. Different types of solenoid valves should be selected for gas-liquid or mixed states. The medium temperature should also be within the allowable range of the solenoid valve, otherwise it may damage the coil or sealing components, negatively impacting the service life. Additionally, the viscosity of the medium should be below 50cSt, and if it exceeds this specification and the diameter is less than 15mm, then a high viscosity solenoid valve should be selected. If the medium is not very clean, it is recommended to install a backwash filter valve in front of the solenoid valve. If the medium flows in a directional manner and backflow is not allowed, then a different solenoid valve may be necessary.

Support and Services:

Our Festo Solenoid Valve product comes with comprehensive technical support and services to ensure that our customers have a positive experience from purchase to usage. Our team of experts provides assistance with the installation, operation, and maintenance of the product to optimize its performance and longevity. We also offer repair and replacement services to minimize downtime and ensure continuous operation. In addition, we provide training and education to our customers to enhance their knowledge and skills in operating our products.

Packing and Shipping:

Product Packaging:

• The Festo Solenoid Valve will be securely packaged in a cardboard box.
• The product will be wrapped in bubble wrap to prevent any damage during shipping.
• The package will also include a user manual and any necessary mounting hardware.

Shipping:

• Shipping will be handled by a reputable courier service.
• The package will be shipped within 1-2 business days of placing the order.
• Customers will receive a tracking number to monitor the status of their shipment.
• The estimated delivery time will vary depending on the destination.
• Shipping fees will be calculated at checkout based on the destination and shipping method selected by the customer.