CKD solenoid valve maintenance do not ignore these four aspects

CKD solenoid valve is used in the liquid circuit system to realize the on-off of the liquid circuit or the change of the flow direction. It generally has a spool that can slide under the electromagnetic force of the coil. When the spool is in different positions, the solenoid valve The pathway is different. When energized, the electromagnetic coil generates electromagnetic force to lift the closing member from the valve seat, and the valve opens; when the power is off, the electromagnetic force disappears, the spring presses the closing member on the valve seat, and the valve closes. The characteristic is that it can work normally under vacuum, negative pressure and zero pressure, but the diameter is generally not more than 25mm. The valve flap moves linearly along the centerline of the fluid.

The opening or closing stroke of the CKD solenoid valve is relatively short, and it has a very reliable shut-off function. Because the change of the valve seat port is proportional to the stroke of the valve disc, it is very suitable for adjusting the flow. Therefore, this type of valve is very suitable for shut-off or regulating and throttling. It is a compulsory sealed valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface to not leak. When the medium enters the valve from below the valve disc, the resistance to be overcome by the operating force is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve. The diameter must be large, otherwise the failure of the valve stem bending will occur. In recent years, the medium flow direction has been changed from above the valve disc into the valve cavity. At this time, under the action of the medium pressure, the force to close the valve is small, while the force to open the valve is large, and the diameter of the valve stem can be reduced accordingly.

In daily use, we will carry out maintenance work on the solenoid valve, but most of the maintenance work is hastily, and some details are not handled well, so I will tell you some details about it today to make everyone more profound. Recognize the maintenance points of the solenoid valve.

1. Line maintenance

After opening the junction box, separate the housing from the terminal post, and then pass the insulated wire through the gland, put a sealing ring through the junction box shell, peel off the insulated wire 10 mm and fix it on the post, pay attention to the positive and negative pole.

2.Manual button

When the manual button is pressed, the solenoid valve can be opened, and it will return to the initial state when released. Use a general screwdriver to press and rotate to tighten the manual button.

3.Protection circuit

With protection circuit or indicator light can reduce the impact of external voltage on the solenoid valve, and can also be directly connected to the operating device. Generally, this can be installed if it is needed, but not installed. The function of the product gasket is to fill the two joint surfaces, making the joint more compact without extra gaps, so as to prevent the leakage of the circulating medium from the joint surface.

4.Requirements on gaskets

The material of the gasket must have certain elasticity and strength within the working temperature range to enhance the tight reliability of the hydraulic solenoid valve. Of course, the CKD solenoid valve must also have good corrosion resistance. This should be selected according to the nature of the circulating medium. .