CAT320C Main Relief Valve 171-0030 310-0395

Produced by Ningbo Longerfa—a professional manufacturer dedicated to high-quality excavator main/auxiliary relief valves—the CAT320C Main Relief Valve 171-0030  310-0395 is a critical, high-performance hydraulic spare part, with exceptionally rigorous quality control as its core advantage.​

We select top-grade material with high tensile strength and corrosion resistance, ensuring the valve’s foundational durability. During processing, every step—from precision machining to surface treatment—follows international high standards, eliminating burrs, unevenness, and other defects. For material treatment, strict heat treatment processes (including quenching and tempering) are applied to enhance the valve’s hardness and toughness, further extending its service life. Most importantly, each valve undergoes a 360° inspection: pressure endurance tests , high-pressure leakage detection—only products passing all tests are delivered.​

This strict quality focus earns consistent praise from cooperative customers: many feedback that the valve maintains stable performance even after long-term heavy use, with almost no maintenance issues, significantly reducing their equipment downtime costs.​

Backed by Ningbo Longerfa’s hydraulic engineering expertise and responsive after-sales support, the CAT320C Main Relief Valve 171-0030  310-0395—with its proven quality and customer satisfaction—is the trusted choice for excavator owners, maintenance teams, and distributors.