The button filter element B2555RK201K001 of the G761 series servo valve is a key filter element in the hydraulic system, and its status directly affects the stability and life of the servo valve and even the entire system. When the filter element reaches a saturated state, it means that it has accumulated enough impurities and can no longer filter effectively. At this time, it needs to be replaced in time.

You can determine whether the filter element is saturated by the following methods:

• Pressure difference monitoring: A significant increase in the pressure difference before and after the filter element is the main indicator that the filter element is close to saturation. Most servo valve systems are equipped with a differential pressure gauge or sensor to monitor this change. When the pressure differential exceeds the manufacturer’s recommended range, it usually means the filter element needs to be replaced.
• Regular inspections: Even if the pressure difference does not reach the extreme value, regular replacement of filter elements is part of preventive maintenance to ensure continued efficient operation of the system.
• Visual inspection: Disassemble the filter element for visual inspection. If you find a large amount of sediment on the surface of the filter element, the color becomes darker, or the shape changes, these are signs of saturated filter element.
• Decreased performance: If the performance of the servo valve or the entire hydraulic system begins to decrease, such as slower response, reduced efficiency, or unusual noises, this may also be a sign of filter saturation.

Properly replacing your servo valve filter element is critical to maintaining a healthy system. Here are a few important considerations during the replacement process:

• Clean environment: Replacing the filter element should be done in a clean environment to avoid dust and impurities from re-entering the system. Use cleaning tools and gloves, and make sure the work area is dust-free.
• Drain old oil: When replacing the filter element, the old oil in the filter element should be drained out to prevent contaminants from entering the oil circuit again.
• Check the interface: Before installing a new filter element, check the filter element seat and interface for damage or residue, and clean them if necessary.
• Install a new filter element: Make sure the new filter element is the same model as the old filter element and is installed correctly according to the manufacturer’s instructions. Over-tightening may cause damage to the filter element or connections.
• System flushing: After replacing the filter element, flush the system with clean hydraulic oil to ensure that all contaminants are removed.
• Startup Check: Before restarting the system, carefully check all connections for leaks. After startup, monitor system pressure and performance to confirm everything is working properly.

Proper operation of the servo valve depends on clean hydraulic oil, and the filter element is a key component to achieve this goal. Through regular monitoring and timely replacement of filter elements, system failures can be significantly reduced and the service life of the equipment can be extended. Remember, prevention is always better than remedy, and regular maintenance inspections and proper filter replacement practices are key to keeping your servo valve system healthy.
Yoyik offers various types of valves and pumps and its spare parts for power plants:
Sealing Oil Vacuum Pump Mechanical Seal KZ/100WS
Solenoid valve 22FDA-F5T-W220R-20/LBO
stainless steel multistage centrifugal pump CZ50-250C
Actuator mounting bracket P18638C-00
solenoid valve FRD.WJA3.001
rotary screw pump 3GR30X4W2
Mechanical seal ZU44-45
globe valve for steam line WJ32F1.6P
horizontal centrifugal water pump YCZ-50-250C
Sealing gasket for corrugated pipe shut-off valve KHWJ25F3.2P
Valve plate set 977HP
Solenoid directional valve 4WE6D62/EG110N9K4/V
Manual shut-off valve WJ25F16P
VALVE 1-24-DC-16 24102-12-4R-B13
Seal & bearing kit M4222
6 volt solenoid valve Z2805013
globe valve for steam line WJ50F1.6P-Ⅱ
OPC and ETS Solenoid Valves 4WE6D-L6X/EG220NZ5L
radial vane pump F3-V10-1S6S-1C20
24 volt dc solenoid coil 4WE6D62/EG220N9K4/V