The sealing oil differential pressure valve KC50P-97 is a precision control device used in the sealing oil system of generator sets. It is mainly used to regulate the pressure difference between the sealing oil and hydrogen gas, ensuring the stable operation of the system.

Working principle
1. Pressure comparison and regulation:
-The sum of hydrogen pressure and spring pressure: The differential pressure valve adjusts the valve opening by comparing the difference between the sum of hydrogen pressure (p1) and spring pressure (p2) and the sealing oil pressure (p).
-Valve stem movement: When the sum of hydrogen pressure and spring pressure is greater than the oil pressure, the valve port contracts, reducing the outlet flow and lowering the pressure; On the contrary, when the sum of hydrogen pressure and spring pressure is less than the oil pressure, the valve port expands, increasing the outlet flow rate and raising the pressure.

2. Differential pressure range:
-The pressure differential adjustment range of this valve is 0.4~1.4 bar, which can adapt to different working conditions.
-When the hydrogen pressure rises above 0.05 MPa, the valve automatically starts operating.

3. Automatic adjustment function:
-The differential pressure valve feeds back the oil pressure and hydrogen pressure at the sealing tile to the valve through two pressure pipes, and automatically adjusts the valve opening according to the change in pressure difference to ensure that the sealing oil system is always in a stable state.

4. Balanced membrane design:
-Adopting a balanced diaphragm and auxiliary system design can effectively reduce pressure loss in the oil circuit and improve system efficiency in the closed state.

Installation and maintenance
-Installation requirements:
-Ensure that the fluid flow direction inside the valve body is consistent with the flow direction indicator arrow on the valve body.
-Avoid blocking the pressure pipe to prevent rainwater, ice, and other impurities from entering the valve.
-When using flange connections, align the flanges and tighten the screws.

-Maintenance precautions:
-Regularly inspect and replace vulnerable parts such as sealing rings to ensure the normal operation of the valve.
-Regularly clean impurities in the pipeline to prevent blockage.

Application scenarios
-Generator set: used for sealing the oil system, ensuring that the sealing oil pressure is slightly higher than the hydrogen pressure inside the generator to prevent hydrogen leakage.
-In other industrial fields, it can also be applied to hydrogen compressors, hydrogen storage devices, hydrogen transmission pipelines, and other systems.