Relief Valve
0102030405
Sunward Excavator Parts - SWE70 SWE50 Main Control Valve
Sunward Excavator Parts - SWE70 SWE50 Main Control Valve
Sunward Excavator Parts - SWE70 SWE50 Main Control Valve
Fit for SWE50 and SWE70 series excavators (part no.: 618901), this main relief valve is a core hydraulic protection component from Ningbo Longerfa Hydraulic Co., Ltd.—a professional hydraulic parts manufacturer in Ningbo, China, specializing in cartridge valves, pressure control valves and small-to-medium-sized excavator hydraulic accessories.
Longerfa holds ISO9001/ISO45001 certifications and patents, with advanced CNC precision machining equipment and excavator-specific quality testing platforms. Every 618901 main relief valve undergoes 100% pressure calibration testing and leak-proof verification, fully complying with industry standards and the precise hydraulic system parameters of SWE50/SWE70 excavators, ensuring perfect matching with the original equipment’s pressure control requirements.
As the "safety core" of SWE50/SWE70’s hydraulic system, this main relief valve monitors system pressure in real time: when the pressure exceeds the preset safety threshold (such as during urban construction, farmland renovation or small-scale earthmoving operations), it automatically opens to discharge excess hydraulic oil, effectively preventing damage to core components like the hydraulic pump, main control valve and boom/lifting cylinders caused by overpressure. It adopts a high-precision pressure regulating spring and corrosion-resistant valve body material, adapting to the frequent start-stop and variable working conditions of small-to-medium-sized excavators. Adhering to original specs for direct replacement, it eliminates the need for complex system debugging during maintenance, significantly shortening equipment downtime. Trusted by global aftermarket users, it’s widely applied in urban construction, garden engineering, agricultural operations and small-scale mining projects where SWE50/SWE70 excavators are commonly used.
Adhering to "Quality First, Service First," Longerfa provides a dependable choice for aftermarket maintenance and replacement of SWE50/SWE70 excavator hydraulic systems equipped with the 618901 main relief valve, ensuring the hydraulic system maintains stable pressure output and long-term safe, efficient operation.
