Product Introduction
The core function of a filter press is to compress the filter plates to form a sealed filter chamber. The automatic pressure-maintaining hydraulic station is designed to achieve this core function through its power and control system. Its main functions can be summarized as follows:
Advantages
The filter chamber is always sealed to prevent leakage.
The main motor is stopped most of the time, with only the small boost pump operating intermittently. This significantly reduces energy consumption and noise compared to large, continuously running pumps.
Frequent starting and stopping of the main motor and high-pressure pump is avoided, extending equipment life.
Automatic Pressure Maintenance
During the long filtration process, the hydraulic system pressure slowly decreases due to slight compression of the oil, elastic deformation of the piping, and slight creep of the seals. If the pressure drops below a certain level, leakage may occur.
The automatic pressure-maintaining system uses a pressure sensor to monitor the pressure within the cylinder in real time. When the pressure drops to the set lower limit, the hydraulic station automatically activates a small boost pump (usually a plunger pump or a small motor pump unit) to replenish a small amount of hydraulic oil to restore the pressure to the set upper limit, then stops. This process is an automatic cycle.
Providing Compressive Force
Generates sufficient thrust to push the compression plates through the hydraulic cylinder, compressing all filter plates into a single unit. This allows the filter plates to withstand high feed pump pressures (typically 0.8-1.6 MPa or even higher) during the filtration process without leakage.
Insufficient compression can cause slurry to spray between the filter plates, resulting in material loss, environmental pollution, and equipment damage.
Achieving automatic cycling
Interacts with the filter press’s PLC control system to automatically complete the entire operating cycle of “compacting → maintaining pressure → releasing pressure → releasing.”
After filtration is complete, the hydraulic station reverses the oil supply, causing the hydraulic cylinder to retract in preparation for unloading.
