803006890 XCMG GR2605 motor grader one-way valve

803006890 XCMG GR2605 motor grader one-way valve

Core Product Advantages

Specifically designed for the XCMG GR2605 motor grader, this valve perfectly matches the model’s 194kW rated power output and 24.5MPa high-pressure hydraulic system operating conditions. It is precisely suited for harsh working environments such as mining, open-pit mining, and large-scale infrastructure construction, characterized by dust, severe vibration, and flammable and explosive materials. The valve body is forged from 304 stainless steel with a wall thickness ≥18mm and features a built-in explosion-proof pressure relief structure, meeting Ex dIMb explosion-proof standards. This effectively blocks the risk of sparks caused by hydraulic shock, eliminating the hidden dangers of gas and coal dust explosions. Its explosion-proof performance is 40% higher than that of ordinary check valves. The valve body surface undergoes dual treatment with nitriding and anti-corrosion coating, with a salt spray corrosion resistance of over 1500 hours. The internal valve core is made of tungsten-cobalt alloy with a hardness ≥ HRC60, and is equipped with imported fluororubber seals (Shore hardness 70-80, compression set ≤10%). The forward flow resistance loss is ≤0.05MPa, the reverse sealing pressure reaches 1.5 times the working pressure, and the leakage rate is ≤0.5 drops/minute (compliant with GB/T 7935 standard), completely eliminating backflow leakage problems. Adopting a direct-acting opening structure, the opening pressure can be precisely adjusted within the range of 0.03-0.6MPa, with a response time of ≤20ms. Compared with traditional structures, the action sensitivity is improved by 30%, which can quickly adapt to high-frequency pressure fluctuations in hydraulic systems and avoid system failures caused by valve core jamming. The interface specifications strictly match the original installation dimensions of XCMG GR2605, support threaded connection, and are compatible with DN16 diameter pipelines. It can be directly replaced without additional modifications. The installation torque is 8-12N・m, which is convenient for maintenance and greatly reduces equipment downtime losses. It fully meets the high reliability and mining safety standards of XCMG hydraulic components.

Key Technical Parameters

Compatible Model: XCMG GR2605 Mining Grader
Product Model: 803006890
Standards: GB/T 13852-2017 Hydraulic Check Valve Standard + MT/T 1097-2008 Mining Hydraulic Valve Specification + GB/T 3836.1-2021 General Requirements for Explosive Atmospheres + XCMG GR2605 Original Hydraulic System Technical Specification
Valve Type: Straight-through Flameproof One-way Valve
Rated Parameters: Rated working pressure 35MPa (compatible with main unit maximum working pressure 24.5MPa, sufficient safety redundancy), maximum flow rate 120L/min
Explosion-proof Rating: Ex dIMb (compliant with ATEX 2014/34/EU) (Instructions to meet the highest safety requirements for high-gas mines)
Protection Rating: IP67 (Completely dustproof + immersion in 1m water for 30 minutes without leakage)
Structural Features: Conical seal + direct-acting opening, adjustable opening pressure (0.03-0.6MPa)
Valve Body Material: 304 stainless steel (one-piece forging, impact strength ≥35J)
Valve Core Material: Tungsten-cobalt alloy (hardness ≥HRC60, excellent wear resistance)
Sealing Material: Imported fluororubber (oil-resistant and aging-resistant, suitable for various hydraulic media)
Leakage Rate: ≤0.5 drops/minute (GB/T 7935 standard test)
Operating Temperature: -40℃~120℃ (no decrease in sealing performance at high temperatures, no jamming at low temperatures)
Applicable Media: Petroleum-based hydraulic oil, mineral oil, water-glycol, phosphate ester flame-retardant hydraulic oil
Connection Method: Internal thread connection (suitable for DN16 diameter pipelines, installation torque…) Safety Features: Flame retardant and antistatic (surface resistance ≤1×10^8Ω), built-in explosion-proof pressure relief structure, valve body pressure resistant to 52.5MPa with no leakage.
Service Life: ≥3 million cycles without failure, mean time between failures (MTBF) ≥90,000 hours.

Application Scenarios

Suitable for hydraulic system protection in scenarios such as mining, open-pit mining, highway construction, and large-scale infrastructure projects, especially suitable for harsh mining environments with high pressure, high-frequency vibration, and flammable and explosive materials. As a “safety backflow barrier” for the hydraulic system, its conical seal and explosion-proof design can be stably applied to the blade drive circuit, brake hydraulic system, accumulator supply circuit, cooler, and front end of the return oil filter. It effectively prevents the hydraulic medium from flowing back, avoiding sudden drops in system pressure, component damage, or power interruption caused by backflow. At the same time, it responds quickly to changes in hydraulic system pressure, reduces the impact of pressure fluctuations on pipelines, and significantly improves the operational stability and safety of the entire machine’s hydraulic system. It is an original factory-grade precision-fit part for the maintenance and replacement of the XCMG GR2605 grader’s hydraulic system, fully meeting the high safety, high reliability, and strong vibration resistance requirements of mining operations.

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