PC120-6 Main Relief Valve 723-30-90101

Fit for PC120-6 excavators, the 723-30-90101 main relief valve is a high-precision hydraulic component from Ningbo Longerfa Hydraulic Co., Ltd.—a professional manufacturer of hydraulic cartridge valves, valve blocks, and hydraulic parts, located at No. 18 Xingye East Road, Xiepu Town, Zhenhai District, Ningbo, Zhejiang, China.

Certified by ISO9001 and ISO45001, Longerfa holds multiple national invention and utility model patents and is recognized as a 2023 Zhenhai District Enterprise Technology R&D Center. Equipped with imported precision CNC machines and advanced testing tools (cylindricity meters, profilometers, etc.), the company guarantees top-tier manufacturing accuracy. Every new product undergoes 100% performance testing, with samples passing over 1 million cycle life tests.

This main relief valve features sturdy construction, premium-grade materials, and strict heat treatment, delivering reliable pressure regulation to protect hydraulic systems and ensure long service life. Its direct-fit design for PC120-6 allows easy installation, reducing maintenance downtime. Focused on the aftermarket, Longerfa’s products are trusted across construction, mining, and industrial sectors, and sold to global markets.