In recent years, the sales of solenoid valves have surpassed the regulating valves, mainly due to the sharp increase in demand for various special solenoid valves. The following are introduced according to the media category:
(1) Gas solenoid valve
Due to the adjustment of China's fuel structure, the proportion of gas fuels continues to rise, and the demand for gas solenoid valves is also growing. Gas has many kinds of natural gas, industrial gas, city gas, liquefied petroleum gas, etc., and contains various impurities and corrosion conditions, and the requirements for valves are also different. Moreover, the pressure levels vary widely, with compressed gas being as high as 21 to 25 MPa and gas pressure as low as 2 kPa. China has mature products.
It is worth mentioning that dual-fuel vehicles are constantly being promoted in China with the improvement of environmental protection regulations. Twelve cities have already modified tens of thousands of vehicles. Nowadays, more than one set of imported fuel supply devices are used, and the solenoid valves are also Supporting imports. In fact, these solenoid valves are not produced by foreign solenoid valve specialists, and the performance test results are not all in line with the relevant technical standards of the Chinese gas industry.
(2) Steam solenoid valve
The steam solenoid valve must first solve the problem of high temperature resistance, and its sealing material, conductive and magnetic conductive materials must be specially selected. The corrosion of steam pipes is quite severe and must be taken seriously. More importantly, there is a lot of condensed water in the steam pipe after the factory is off work. The solenoid valve needs to be able to operate reliably when the gaseous and liquid fluids pass, and there are many strict procedures for factory inspection.
(3) Water solenoid valve
Water solenoid valves are always considered to be the simplest. In fact, water is divided into tap water, industrial pure water, industrial wastewater, irrigation water, seawater, etc., and its corrosion performance and cleanliness vary. Different electromagnetics should be used. valve. Although the tap water valve is the most common, the performance requirements of the valve are different.
For example, the use of solenoid valves for fire protection is critical to the reliability of the operation, in case the consequences of failure are unimaginable. Even if the ordinary manual valve does not open and close for a long time, it is difficult to open it quickly. In recent years, high-rise buildings have sprung up, and Chinese fire-fighting solenoid valve technology has matured.
In another example, the water plant needs to use a solenoid valve for the inverted siphon line. However, the solenoid valve must be in a pressurized state and must work reliably under vacuum. There must be no internal leakage, and the water is not clean. Underneath, it should still be flexible.
In addition, sprinkler irrigation solenoid valves are gradually being applied with the development of China's agriculture and gardening industry.
(4) Oil solenoid valve
There are many types of oil, and seal technology is one of the keys. Oil-resistant rubber is only the name of the category. Different oils and even the same kind of oil contain different oil-resistant rubber. For example, being able to withstand leaded gasoline is not necessarily resistant to unleaded gasoline. In recent years, with the increase in sales of special solenoid valves, the life of special oil-resistant rubber has also increased.
The viscosity of the oil varies greatly, and solenoid valves of different structures must be used.
High-viscosity oils are also often circulated at high temperatures, so the solenoid valve also has to solve the problem of high temperature resistance. For fuel oil, explosion protection requirements must also be met.
In recent years, the company has successively introduced various special solenoid valves such as gasoline, diesel and heavy oil, which have been widely used.
(5) Solenoid valve for air conditioning
Air conditioning is divided into heat and cooling. Refrigerants have changed significantly in recent years, ammonia and freon have been gradually reduced, and new refrigerants such as lithium bromide are gradually increasing. Relevant problems such as sealing, corrosion and life expectancy require careful selection of materials, reasonable design and advanced technology. It is worth mentioning that the air conditioner mainly controls the temperature and humidity by adjusting the air volume, and the continuous adjustment of the valve flow is not absolutely necessary. Now, the valveless air conditioning system is also in use, but it is condemned for problems such as condensation and dripping. Therefore, the solenoid valve with simple structure and low price is the most popular choice. Due to the influence of foreign traditions, electric valves with complex structures and difficult torque control are still widely used in China.
Shandong Zeen Decoration Material Co., Ltd. , https://www.zeendecor.com