072-702 is a practical hydraulic directional control valve. It is widely used in construction machinery, agricultural machinery, lifting equipment and general industrial hydraulic systems to control the flow direction of hydraulic oil, realize forward and reverse movement and position switching of actuators, and ensure flexible and reliable action of mechanical equipment.

Working medium: Mineral hydraulic oilFluid cleanliness: Comply with ISO 4406 standardRated working pressure: 21 MPaMax instantaneous pressure: 25 MPaApplicable oil viscosity: 15~68 mm²/sOperating temperature: -20℃ ~ +80℃Control mode: Manual operationFlow characteristic: Stable flow outputInternal leakage: Low leakage volumeInstallation form: Standard fixed mountingService condition: Adapt to frequent switching operation

Precision matched valve core ensures smooth switching and flexible operation without sticking. Optimized internal flow passage reduces flow resistance and hydraulic power loss. High-strength wear-resistant materials are adopted for key parts to prolong service life. Good overall sealing performance effectively prevents internal and external oil leakage. Compact structure design saves installation space and is easy for overall layout. Strong vibration resistance, stable working performance in harsh working environment. Simple operation mode, easy on-site use and convenient daily maintenance.

Clean mounting surface and all oil passages to remove dirt and impurities before installation. Fix the valve firmly with standard fasteners and tighten bolts according to specified torque, avoid excessive force causing structural deformation. Connect hydraulic pipelines strictly in accordance with oil flow direction and interface definition. Confirm all pipeline connections are tight and assembly positions are accurate after installation.

Complete installation and pipeline connection, then carry out no-load test run. Slowly fill hydraulic oil and check all joints for oil leakage. Operate the control handle gently to switch oil circuit direction and test whether the action is smooth. Keep hydraulic oil clean during formal operation, replace filter elements regularly to avoid internal blockage. Do not use under overpressure and overload conditions to avoid component damage. Release system pressure completely before long-term stop and maintenance.

Regularly check the valve body and connecting parts for oil seepage, replace aging sealing parts in time. Regularly check the flexibility of operating mechanism and add lubricant properly if necessary. Keep the outer surface clean to prevent dust and oil sludge from affecting normal use. Do not disassemble the valve without professional guidance to avoid damage to internal precision structures.

All installation, commissioning and maintenance work must be carried out after equipment shutdown, power cut and full pressure relief of hydraulic system, so as to avoid personal injury caused by high-pressure hydraulic oil. Operators shall follow standard safety operating procedures. Keep the product away from high temperature, open fire and corrosive substances. Stop using immediately once abnormal noise, unsmooth action and oil leakage failure occur, and arrange professional inspection and repair in time.