The steam solenoid valve is suitable for actuators that use steam as the heating medium for automatic temperature control. It can perform two position automatic control and remote control on the steam pipelines of steam equipment such as steam heaters, radiators, dryers, as well as various temperature control instruments, steam setting machines, steam dyeing machines, steam moisture regain machines, and other complete sets of equipment. Widely used in automatic control systems in departments such as dyeing and chemical, textile, printing and dyeing, food, medicine, cigarettes, cement products, petrochemicals, metallurgy, etc.
The main characteristics of steam solenoid valves are as follows:
1、 External leakage blocking, internal leakage easy to control, safe to use. Internal and external leakage is a factor that endangers safety. Other automatic control valves usually extend the valve stem and are controlled by electric, pneumatic, or hydraulic actuators to rotate or move the valve core. This needs to solve the problem of external leakage caused by long-term action of the valve stem dynamic seal; Only electromagnetic valves are completed by applying electromagnetic force to the iron core sealed in the magnetic isolation sleeve of the electric control valve, without dynamic sealing, so external leakage is easy to block. It is difficult to control the torque of electric valves, which can easily cause internal leakage and even pull off the valve stem head; The structural type of solenoid valve is easy to control internal leakage until it drops to zero. Therefore, the use of solenoid valves is particularly safe, especially suitable for corrosive, toxic, or high and low temperature media.
2、 The steam solenoid valve system is simple, easy to connect to a computer, and affordable in price. The steam solenoid valve itself has a simple structure and low price, making it easier to install and maintain compared to other types of actuators such as regulating valves. More significantly, the composed automatic control system is much simpler and much cheaper. Due to the switch signal control of the solenoid valve, it is very convenient to connect with the industrial computer. In today's era of widespread use of computers and significant price reductions, the advantages of steam solenoid valves are even more apparent.
3、 The steam solenoid valve operates quickly, with small power and a lightweight appearance. The response time of solenoid valves can be as short as a few milliseconds, and even pilot operated solenoid valves can be controlled within a few tens of milliseconds. Due to its own circuit, it responds more sensitively than other automatic control valves. Properly designed solenoid valve coils have low power consumption and are energy-saving products; It can also achieve automatic valve position control by simply triggering the action, without consuming any electricity during normal operation. The steam solenoid valve has a small external size, which saves space and is lightweight and beautiful.
4、 The adjustment accuracy is limited, and the applicable medium is limited. Steam solenoid 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. (There are many new ideas that are trying to break through, but they are still in the experimental trial stage.) Therefore, the adjustment accuracy is still limited to a certain extent.
Steam solenoid valves have high requirements for medium cleanliness, and media containing particles cannot be used. If impurities are present, they must be filtered out first. In addition, viscous media are not suitable, and the viscosity range of the media suitable for specific products is relatively narrow.
5、 Steam solenoid valves have a variety of models and a wide range of applications. Although steam solenoid 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. The progress of steam solenoid valve technology also revolves around how to overcome inherent shortcomings and better leverage inherent advantages.
The steam solenoid valve is also relatively wear-resistant, heat-resistant, and resistant to condensation.
The steam solenoid valves currently in use usually pass through the following two types of steam:
The saturated steam temperature and pressure of the boiler steam are relatively stable, with a temperature below ℃ and a working pressure below.
Soft sealed steam solenoid valves are commonly used:
Structural features: This valve is a pilot operated secondary opening solenoid valve composed of two main components: the auxiliary valve and the main valve.
Heat resistance: Special high-temperature resistant electrical and sealing materials are used for the electromagnetic and sealing parts, and various insulation measures are applied.
Wear resistance: Reasonable material selection, clever use of fluid lubrication between valve cup and guide sleeve, reducing wear and improving service life
Anti condensation: The condensation water in the steam pipeline is an important factor affecting the operation of the steam solenoid valve, while this valve is not affected by condensation water.
This series of solenoid valves can also be widely used in textile, printing, chemical, plastic, rubber, pharmaceutical, food, building materials, machinery, electrical, surface treatment and scientific research departments, as well as bathroom, cafeteria, air conditioning and other self-control systems The temperature and pressure changes of the superheated steam from the thermal power plant are relatively large,
The temperature can reach above, while the working pressure is below.
Hard sealed steam solenoid valves are usually chosen:
Structural features: Adopting metal hard sealing improves the product's operating temperature and service life.
Reasonable material selection, clever use of fluid lubrication between the valve cup and guide sleeve to reduce wear.
Other uses: Hard sealed steam solenoid valve. This product has a wide range of universal media and can be used for fluids such as water, light oil, heavy oil, non corrosive gases, and steam. In the drainage system of the power station's extraction pipeline and the exhaust system of the evaporator, the main function is to perform dual position automatic adjustment and remote control of the medium in the pipeline.
Working status: normally closed, powered on open, powered off closed, normally open, powered off open, powered off closed.