How does the F011068 NORGREN valve group pilot valve work?

　　F011068 Norgren valve group pilot valveHow does it work? The presence of any part is meaningful and has its function. When applied in different situations, the role it plays is irreplaceable, and the pilot valve is no exception. Although it is mostly used as an auxiliary, its working role is also significant, and it is necessary to understand its principles.

　　The pilot valve is mainly used for pressure detection, serving as a switch for the main valve to ensure the sealing performance and other performance indicators of the pilot safety valve. It not only strictly requires the flatness and surface roughness of the valve seat sealing surface but also the sealing surface of the main valve. Additionally, it strictly requires the flatness and roughness of the valve seat sealing surface and the sealing surface of the guide valve. The geometric size and pressure of the compression spring also need to be paid extra attention to, and materials and heat treatment must be strictly controlled to meet specific pressure sealing requirements.

　　F011068 Norgren valve group pilot valveIn a normal working scenario: The force of the spring will cause the sealing surface of the pilot valve to close. The main valve inlet and the upper air chamber are connected through the pilot valve, allowing the medium to enter the upper air chamber of the main valve piston through the pilot valve. Since the working area above the piston is larger than the sealing area of the main valve disc, the piston is subjected to a net downward force to maintain the sealing of the main valve.

　　In an open scenario: When the pressure of the main valve rises to a preset value, the pilot valve needs to open first. The medium in the main valve air chamber is discharged through the sealing surface of the pilot valve, creating a pressure difference above and below the floating plug valve, causing the blocking valve to move upward to the main valve. The passage to the air chamber is closed, and the pressure in the air chamber rapidly decreases. When the pressure in the air chamber decreases to a certain level, the upward force of the main valve piston exceeds the total of the downward force and friction, and the piston moves upward and discharges.

　　F011068 Norgren valve group pilot valve: In a return scenario: When the pressure at the inlet of the main valve drops to the return pressure, the pilot valve will first return to the valve seat, and the sealing surface of the pilot valve closes (the external exhaust passage closes). The floating plug valve opens downward, creating a passage to the upper air chamber of the main valve piston. The medium enters the upper air chamber of the main valve piston through the pilot valve, gradually increasing the working principle of the pilot safety valve. When the pressure in the air chamber increases to a certain level, the main valve quickly closes and resumes normal operation when the downward force of the piston exceeds the total of the upward force and friction.

　　The specification of the pilot valve is relatively small, and the signal is relatively weak. In most cases, it is used as an auxiliary valve because of its performance. It is mostly used in pressure control valves, with a flow rate generally around one liter per minute, and larger flows do not exceed three liters per minute.

　　The above introduction isF011068 Norgren valve group pilot valvehow it works. In fact, many people know what type of part to install in what position, but if you really want to explain the working principle and function of this part, I believe most people do not know. Therefore, to correctly use each part, the first thing to do is to understand it.