Electromagnetic reversing valves are one of the most commonly used hydraulic components in hydraulic systems and are relatively common. But if you want to know clearly the quality of the electromagnetic reversing valve, how should you tell?
Electromagnetic reversing valves are one of the most commonly used hydraulic components in hydraulic systems and are relatively common. But if you want to know clearly the quality of the electromagnetic reversing valve, how should you tell? Dalan Hydraulics tells you to look at the following two points:
1. Process of electromagnetic reversing valve
1 mainly in the processing technology, precision.
2 The clearance between the valve plug and the valve body, because the spool needs to move smoothly in the valve body, it must ensure a certain gap between the two.
3 If the gap is too large, the seal between the ports cannot be achieved, and the internal leakage is too large.
4 Under the premise of smooth movement of the valve core, the smaller the matching clearance, the more the electromagnetic reversing valve can withstand high pressure and maintain a good seal.
The coaxiality of the 5 spool is also extremely demanding. The coaxiality of the valve core is not good. Under the pressure environment, the force applied to the valve core is not equal. The pressure difference causes the valve core to be pushed to one side and close to the inner wall of the valve body, causing the valve to be stuck.
6 Some inferior electromagnetic reversing valves are prone to jamming after running for a certain period of time. In some cases, due to the low hardness of the spool, the concentricity is reduced after wear.
2, material
1 The electromagnetic reversing valve adopts a slide valve structure. When the electromagnet is energized, the cylindrical valve core moves back and forth inside the valve body, which inevitably causes friction with the valve body.
2 The electromagnetic reversing valve is subjected to high pressure inside during work, which aggravates the wear phenomenon. Therefore, the high pressure, high frequency environment requires higher durability for the electromagnetic reversing valve.
3 For ordinary electromagnetic reversing valves with low valve core and valve body hardness, in this high-voltage high-frequency operation, the wear is faster, so that the matching clearance between the valve body and the valve core increases, and when it reaches a certain limit, it will Causes the internal leakage of the electromagnetic reversing valve to increase.
4 valve body is made of ductile iron casting process, through the proportioning process of raw materials, can increase the hardness of the valve body.
5 good electromagnet, copper wire, silicon steel sheet, white iron tube material specifications are higher, in addition to ensuring long-term pressure resistance under high pressure environment, smooth operation, can ensure low temperature rise during high-voltage high-frequency operation, itself extend electromagnetic Iron service life.
6 can help control the temperature rise of the hydraulic oil. If the temperature of the hydraulic oil is too high, the oil quality changes, which may cause the hydraulic system to malfunction or even malfunction.
7 other details of the material, such as the sealing O-ring hardness, return spring material, etc., will also affect the performance of the electromagnetic reversing valve.
-----Responsible Editor: Dalan Oil Pump Motor 02-Procurement Consultant
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