This is a high-performance hydraulic check valve, widely used in construction machinery, lifting equipment and industrial hydraulic systems. It effectively prevents hydraulic oil backflow, maintains system pressure, ensures stable operation of hydraulic circuits and protects related hydraulic components.

Working medium: Standard mineral hydraulic oilFluid cleanliness: Comply with ISO 4406 standardRated working pressure: 21 MPaMax instantaneous pressure: 25 MPaApplicable oil viscosity: 15~68 mm²/sWorking temperature: -20℃ ~ +80℃Opening mode: Spring automatic openingSealing performance: Near zero backflow leakageInstallation type: Standard thread connectionWorking condition: Suitable for long-term continuous operation

High-strength valve body, strong pressure resistance and wear resistance.Precision sealing spool, tight closing and excellent anti-backflow effect.Compact internal structure, quick response and stable action.Small flow resistance, low energy loss during oil passing.Good vibration resistance, adapt to various harsh working environments.Lightweight body, easy installation, replacement and layout.Simple structure, low failure rate and easy daily maintenance.

Clean oil ports and internal oil passages to remove impurities before installation.Install strictly according to oil flow direction mark, cannot be installed reversely.Tighten the thread interface with standard torque, avoid over-tightening damage.Connect hydraulic pipelines firmly and check sealing performance after assembly.

After installation, conduct no-load test to confirm smooth oil feeding and no backflow phenomenon.Keep hydraulic oil clean and replace filter elements regularly to avoid particle blockage.Do not use beyond the maximum allowable pressure range.Release system pressure completely before equipment maintenance and disassembly.

Regularly check joint positions for oil seepage, replace aging sealing parts in time.Check whether the one-way closing function is sensitive and reliable periodically.Keep valve surface clean to prevent dust and oil dirt accumulation.Do not disassemble privately to avoid damaging internal matching parts.

All installation and disassembly work must be done after equipment stops running and hydraulic pressure is fully released, to prevent high-pressure oil injury.Follow safety operating specifications during use.Keep away from high temperature and corrosive substances.Stop using immediately once backflow failure, oil leakage and abnormal noise occur, and arrange inspection and replacement in time.