This is a heavy-duty integrated hydraulic control valve unit, adopted in engineering machinery, port handling equipment, heavy industrial hydraulic systems and mobile machinery. It integrates multiple hydraulic control functions, stably controls oil circuit switching, flow distribution and pressure holding, ensures reliable and coordinated action of executive parts, and adapts to high-load complex working conditions.

Working medium: Mineral hydraulic oilFluid cleanliness standard: ISO 4406Rated working pressure: 21 MPaMaximum impact pressure: 26 MPaApplicable oil viscosity: 15~72 mm²/sWorking temperature range: -20℃ ~ +85℃Control mode: Combined mechanical controlLeakage level: Ultra-low internal and external leakageConnection form: Standard integrated interface installationWorking performance: Long-term stable heavy-load continuous operation

Integrated modular design, compact structure, save installation space and simplify pipeline arrangement.High-strength integral forged valve body, strong pressure resistance and impact resistance.Precision assembled internal components, flexible action, no jamming and stable control.Multi-loop combined oil passage design, reasonable flow distribution and low pressure loss.High-grade sealing assembly, durable sealing performance, no oil leakage under long-term pressure.Excellent vibration and corrosion resistance, suitable for outdoor and harsh construction sites.Stable overall performance, low failure rate, convenient field debugging and later maintenance.

Clean all oil ports, mounting surfaces and internal oil passages thoroughly to remove scrap iron, dust and oil dirt before installation.Align the installation positioning hole correctly, fix the valve unit firmly with standard fasteners according to specified torque.Connect main oil inlet, oil return and branch control pipelines strictly in accordance with system oil circuit requirements.Check all connecting interfaces for firm connection and good sealing after installation is completed.

Perform low-pressure no-load test operation firstly after installation completion, check all joints and sealing positions for oil leakage.Gradually boost pressure to the standard working pressure, test each control function one by one to confirm normal response.Keep circulating hydraulic oil clean during daily operation, replace filter elements regularly to avoid impurity blockage.Strictly forbid long-term overpressure and overload operation to extend service life.Fully release residual pressure inside the hydraulic system before equipment shutdown, maintenance and disassembly.

Regularly inspect the valve body and pipeline joints for oil seepage, replace aging and damaged sealing accessories in a timely manner.Periodically test the sensitivity and stability of each control function, adjust and calibrate if abnormal deviation occurs.Keep the outer surface clean, remove accumulated oil sludge and dust to ensure good heat dissipation.Non-professional personnel are prohibited from private disassembly and assembly, so as not to disrupt internal matching accuracy and cause failure.

All installation, commissioning, adjustment and maintenance operations must be carried out after equipment stops running, power is cut off and hydraulic system pressure is completely released, to avoid personal injury caused by high-pressure hydraulic oil.Operators must abide by on-site safety operation specifications.Keep the product away from high-temperature heat sources, open fire and strong corrosive substances.Once abnormal noise, jamming action, pressure fluctuation and serious oil leakage occur during operation, stop using immediately and arrange professional inspection and troubleshooting.