Hydraulic system 191.019.01 Seitz pilot valve and its working principle

　　Hydraulic System191.019.01 Seitz Pilot Valveand its Working Principle

　　What is the 191.019.01 Seitz Pilot Valve? What is the role of the pilot valve in a hydraulic system? Friends who are not professionals may not understand. In fact, a pilot valve is a type of valve that plays a control role. A pilot valve is a tool-controlled valve that also requires electrical control. Let the manufacturer introduce the role of the pilot valve and related knowledge! A pilot valve is an auxiliary valve used to operate the control mechanism in another valve or component.

　　Common characteristics of the 191.019.01 Seitz Pilot Valve: composed of a pilot-controlled liquid bridge with fixed liquid resistance, controlled according to the input signal of the main valve or auxiliary valve or variable rod; the flow rate of the head pilot valve is generally only about 1 liter/minute, with a maximum of 3 liters/minute. The flow rates of the two pilot valves should be determined based on actual needs. The input signal is relatively small; it can accept various input methods, such as manual, electric, hydraulic, pneumatic, mechanical cam, electric ratio, etc.; in the case of variable pump control, multiple pilot valves form a modular structure, making it convenient to choose various functions; the pilot valve itself is often a small-sized control valve, mostly pressure control valves. When powered, the electromagnetic force opens the pilot hole, causing the chamber pressure to drop rapidly, creating a pressure difference around the upper and lower parts, and the fluid pressure pushes the closing part upward, opening the valve; when power is cut off, the spring force closes the pilot hole, and the inlet pressure rapidly forms a low-to-high pressure difference around the valve through the bypass hole chamber, pushing the closing part downward, closing the valve.

　　Hydraulic191.019.01 Seitz Pilot ValveThe role of the system is to increase force by changing pressure. A complete hydraulic system consists of five parts: power components, actuators, control components, auxiliary components (attachments), and hydraulic oil. Hydraulic systems can be divided into two categories: hydraulic transmission systems and hydraulic control systems. The hydraulic transmission system primarily functions to transmit power and motion. The hydraulic control system ensures that the output of the hydraulic system meets specific performance requirements (especially dynamic performance). The hydraulic system usually refers to the hydraulic transmission system. During operation, the liquid pressure acts simultaneously on the pressure measurement surfaces of the main valve core and the pilot valve core. 191.019.01 Seitz Pilot Valve: When the pilot valve is not opened, there is no oil flow in the valve chamber, and the pressure in both directions of the main valve core is equal. However, since the effective pressure area on the upper surface is greater than that on the lower end surface, the main valve core is in a lower position under the action of the resultant force, and the valve port is closed. When the inlet pressure rises and opens the pilot valve, the liquid flows through the damping hole on the main valve core, and the pilot valve returns to the tank. Due to the damping effect of the damping hole, the liquid pressure in the upward and downward directions of the main valve core is not equal. Under the action of the pressure difference, the main valve core moves upward, opening the valve port, achieving overflow, and maintaining the pressure basically stable. By adjusting the pressure regulating spring of the pilot valve, the overflow pressure can be adjusted.