What are the start-up conditions for a pilot sequence valve?

The pilot sequence valve plays a vital role in the hydraulic system, controlling the flow sequence of the fluid to achieve orderly operation of the hydraulic actuator. In order to ensure that the valve can start smoothly and work properly, certain start-up conditions must be met. The following will explore these start-up conditions and their importance in depth.

1. System pressure
The first condition for starting a pilot sequence valve is the pressure of the hydraulic system. Usually, the valve is set to a specific start-up pressure, and the pilot valve will only be activated when the fluid pressure in the system reaches this set value. This pressure value is determined according to the design requirements and working environment of the hydraulic system.
Pressure setting: Each pilot sequence valve has its rated pressure range. When designing a hydraulic system, engineers need to ensure that the system operating pressure is always maintained within this range to ensure the normal start-up and operation of the valve.
Pressure monitoring: Use a pressure sensor to monitor the system pressure to ensure real-time feedback and prevent the valve from failing to start due to insufficient pressure.

2. Fluid temperature
The fluid temperature in the hydraulic system is also an important factor affecting the start-up of the pilot sequence valve. The viscosity of the fluid changes with temperature, which affects its fluidity and pressure transmission capacity.
Temperature influence: Under low temperature conditions, the viscosity of the liquid increases and the fluidity decreases, which may cause the valve to start unsmoothly; under high temperature conditions, the viscosity decreases and the fluid flows more smoothly.
Temperature control: Control the fluid temperature through the heating or cooling system to keep it within the appropriate working range to ensure the normal start of the pilot sequence valve.

3. Pilot pressure
The start of the pilot sequence valve depends not only on the system pressure, but also on the requirements of the pilot pressure. The pilot pressure refers to the pressure acting on the pilot valve. Only when it reaches the set value can the main valve be activated.
Pilot pressure setting: According to the requirements of the hydraulic system, the setting value of the pilot pressure needs to be higher than the system pressure in order to effectively start the valve under specific circumstances.
Pilot pressure control: By adjusting the flow and pressure in the system, ensure that sufficient pilot pressure is provided when needed.

4. Flow conditions
The flow conditions of the fluid also have a direct impact on the start of the pilot sequence valve. In normal operation, too small a flow may cause a delay in valve start-up, while too large a flow will increase the system burden.
Flow monitoring: Use a flow meter to monitor the flow of liquid in real time to ensure that the flow is within a reasonable range so that the pilot sequence valve can be started smoothly.
Flow regulation: Arrange the flow control elements reasonably in the system design to ensure that the flow of liquid is moderate when entering the pilot valve.

5. Valve status
The state of the pilot sequence valve itself will also affect its startup. If the valve fails or gets stuck, it will not work properly.
Regular inspection: Regularly inspect and maintain the pilot sequence valve to ensure that its internal components operate flexibly and prevent valve sticking due to dirt, corrosion and other problems.
Fault detection: Configure a fault diagnosis device in the hydraulic system to detect and handle valve faults in time to ensure its normal operation.