Hydraulic plug-in threaded one-way check valve CV08-20

How to prevent the influence of scale on the use of cartridge valves to the greatest extent

1. The appearance of dead zone in the whole process of machining technology will make the independent variable of the whole process deviate from the original set point. Therefore, the derivation of the control board of the low-pressure relief valve must be expanded enough to get rid of the dead zone, and only this corrective operation will occur.

2. ① The primary factor that harms the dead zone. Friction, wandering, valve shaft distortion, dead zone of amplifier. Various control valves have different sensitivity to friction. For example, the plug valve is very sensitive to the friction caused by the negative pressure of the high-pressure gate valve, so we should pay attention to this when using it. However, for some sealing forms, the high pressure gate valve load is necessary to get the closing level. In that case, the design scheme of this kind of valve is particularly poor, and it is very easy to cause a large dead zone, which has a direct impact on the error degree of the whole process, which is obvious and really critical. ② Wear. Wear of gate valve in normal operation is inevitable, but the wear of wetting layer is powerful. In addition, the load caused by working pressure will also cause the wear of sealing layer, which is the key factor to improve friction. The conclusion is destructive harm to the characteristics of the control valve. ③ The friction force of packing is the specific origin of the friction force of control valve, and the friction force of water hydraulic cartridge valve is quite different due to the different packing used. ④ Different types of actuators will also cause comprehensive harm to friction. Generally speaking, the torsion spring plastic film actuator is superior to the piston rod actuator.