Construction machinery relief valve series
0102030405
R215-7 Main Relief Valve 31N6-17400
R215-7 Main Relief Valve 31N6-17400
R215-7 Main Relief Valve 31N6-17400
Suitable for R215-7 series excavators and other compatible equipment (part no.: 31N6-17400), this main relief valve is a core hydraulic safety component from Ningbo Longerfa Hydraulic Co., Ltd.—a professional manufacturer of excavator-compatible hydraulic parts (pressure control valves, cartridge valves, etc.).
Longerfa holds ISO9001/ISO45001 certifications and relevant patents. Each valve undergoes strict quality testing, complying with original equipment standards to match the hydraulic systems of R215-7 and other applicable devices.
As the "safety barrier" of the hydraulic circuit, it monitors real-time pressure. When overpressure occurs (e.g., heavy digging, rock breaking), it releases excess oil to protect hydraulic pumps, cylinders, and control valves.
The valve has a wear-resistant valve core and corrosion-resistant body. It supports direct bolt-on replacement (no system debugging) to reduce maintenance time. Widely used in construction, mining, and infrastructure projects.
Longerfa’s 31N6-17400 valve ensures stable pressure control for R215-7 and other compatible equipment, working reliably in harsh environments.
