Direct-acting solenoid valve and pilot solenoid valve difference
With the advent of the era of industrialization, the strong demand for solenoid valve product market is increasing day by day. It has become one of the first choices for fluid control automation. According to the open working mode of the electromagnetic valve , it can be divided into two most commonly used categories, pilot solenoid valve and direct-acting solenoid valve . However, if the type is not properly selected, it may easily cause the solenoid valve not to work, and at the same time it will have a certain influence on the safety of the working conditions. How to distinguish between the difference between the two, and their respective characteristics, in order to make them better application, this article makes a detailed introduction, please check the following content introduction:
Direct acting solenoid valve:
Direct-acting solenoid valves are generally used in small-diameter, low-pressure environments. When the valve of this structure is opened, it does not require the minimum pressure of the medium to start with zero pressure. Therefore, compared to the starting speed of the pilot solenoid valve, it will Faster, especially for places that require quick cuts.
Features: Power consumption is larger than the pilot solenoid valve, generally in 5-20w , high-frequency power is easy to burn the coil, but the control is simple, the use of a wide range. In the vacuum, negative pressure, zero pressure can work normally, but the diameter generally does not exceed 50mm .
Pilot solenoid valve:
The pilot solenoid valve is generally used for large diameter and high pressure applications. When the valve of this structure is opened, the minimum pressure of the solenoid valve must not be lower than 0.03 MPa . It must have pilot pressure, otherwise it cannot be opened. In addition, the pilot solenoid valve has a larger flow capacity than the direct-acting solenoid valve. Generally, the CV can reach 3 or more. The cleanliness of compressed air is more demanding, and direct-acting is less stringent.
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Features: Small electromagnetic head, small power consumption, 0.1-0.2W , can be frequently powered, long-term power, and will not burn, and energy-saving. The upper limit of the fluid pressure range is high, and it can be installed arbitrarily (to be customized ) , but the fluid pressure difference condition must be met . However, the liquid impurities easily block the pilot valve hole and is not suitable for liquid use.
Direct-acting and pilot solenoid valve difference and application:
1 , under pressure: Pilot solenoid valve withstand liquid pressure, pressure than the straight-through solenoid valve.
2. Response time: The direct-acting solenoid valve starts faster than the pilot type, and is often used for quick cutting. Because the pilot solenoid valve is energized, the small valve is opened first, and the main valve is opened afterwards. The direct-acting solenoid valve is directly opened by the main valve.
3 , the circulation capacity: the pilot solenoid valve's circulation capacity is greater than the direct-acting type, the general CV value can reach 3 or more, and the direct-acting solenoid valve's general CV value is less than 1 .
4 , power and loss: direct-acting solenoid valve power and loss greater than the pilot.
5 , medium cleanliness requirements: Pilot solenoid valve for the purity of the flow medium requirements are relatively high, direct-acting is not so strict.
If you do not understand the principle of the two solenoid valves, you can call our company ( technical department, our company staff will give you a selection based on your operating conditions, introduce the principle structure and use requirements.
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