CAT320C Relief Valve 250-2508

Fit for CAT320C series excavators (part no.: 250-2508), this relief valve is a core hydraulic protection component for excavator aftermarket maintenance, produced by Ningbo Longerfa Hydraulic Co., Ltd.—a professional manufacturer in Ningbo, China, focusing on heavy machinery hydraulic parts, including excavator-specific valves, cartridge valves and hydraulic control assemblies.

Longerfa holds ISO9001/ISO45001 certifications and patents for Caterpillar-compatible hydraulic components, equipped with advanced CNC precision machining equipment and CAT320C-specific hydraulic testing systems. Every 250-2508 relief valve undergoes 100% pressure calibration (control precision up to ±0.3MPa) and 48-hour static leak-proof testing, fully complying with Caterpillar’s original equipment (OE) standards and the strict hydraulic system parameters of CAT320C excavators. It ensures seamless matching with the excavator’s main control valve and hydraulic pump, consistent with the original part’s performance indicators.

As a key "pressure protector" for CAT320C’s hydraulic system, this relief valve monitors the pressure of key circuits (such as boom, arm and swing circuits) in real time. During high-intensity operations like deep excavation, heavy load lifting or rock breaking, if the system pressure exceeds the preset safety value, the valve quickly opens to discharge excess hydraulic oil—effectively avoiding damage to core components such as the hydraulic pump, cylinder seals and precision control valves caused by overpressure. It adopts a high-wear-resistant valve core (surface treated with tungsten carbide coating) and a high-fatigue-resistance stainless steel spring, ensuring stable pressure control even after 15,000+ pressure cycle operations. Following CAT320C’s original installation dimensions for direct bolt-on replacement, it eliminates the need for circuit modification or pressure retuning during maintenance, reducing the excavator’s downtime by 35% on average. Trusted by global aftermarket users, it’s widely applied in construction, mining, earthmoving and infrastructure projects where CAT320C excavators are the main operation equipment.

Adhering to "Quality First, Service First," Longerfa provides a reliable aftermarket solution for CAT320C excavator owners and maintenance service providers. The 250-2508 relief valve ensures the excavator’s hydraulic system maintains stable pressure output, prevents unexpected failures caused by pressure abnormalities, and supports long-term safe and efficient operation even in harsh working environments (high temperature, dust, continuous heavy load).