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In the modern construction industry, excavators are the backbone of numerous critical operations—from trenching and demolition to material handling and grading. Their versatility and efficiency depend heavily on one essential system: hydraulics. Central to this system are Hydraulic Valves, the unsung heroes that regulate the flow and pressure of hydraulic fluid, allowing excavators to perform smooth, precise, and powerful movements.

As a leading manufacturer of threaded cartridge valves and construction machinery valves, Ningbo Longer Hydraulic Co., Ltd. is at the forefront of developing advanced valve technology that powers excavators and other heavy machinery around the globe.

Ningbo, China – Ningbo Longer Machinery Co., Ltd., a leading supplier of construction machinery spare parts, is proud to announce the continued availability and export of the 310-0395 Relief Valve, an essential hydraulic component designed for the CAT320C Caterpillar excavator. With growing global demand for reliable, high-performance spare parts, Ningbo Longer is positioned as a trusted partner for international buyers seeking OEM-quality products at competitive prices.

Excavators are indispensable machines in construction, mining, and various industrial operations across Southeast Asia. At the heart of every excavator’s hydraulic system lies a critical component: the hydraulic relief valve. This component plays a vital role in controlling system pressure and protecting the hydraulic circuit from damage caused by pressure overload. When a relief valve fails, the entire system can suffer — leading to costly downtime and repairs.

As a leading hydraulic valve manufacturer, NINGBO LONGERFA understands the importance of maintaining peak performance in your excavator’s hydraulic system. In this article, we will provide a comprehensive guide on how to troubleshoot and maintain excavator relief valves, helping you extend the life of your equipment and reduce unexpected breakdowns.

Boosting Excavator Performance and Reliability with High-Quality Hydraulic Solutions

Ningbo, China — Ningbo Longerfa Hydraulic Co., Ltd., a trusted name in the field of precision hydraulic components, is proud to announce the availability of the 723-30-50101 Relief Valve for the widely used Komatsu PC120-6 excavator. This latest offering underscores Longerfa's ongoing commitment to delivering durable, cost-effective, and OEM-comparable hydraulic parts to global heavy machinery markets.

As construction, mining, and infrastructure projects continue to demand higher equipment efficiency, the hydraulic system has emerged as a critical component determining overall performance. The 723-30-50101 relief valve plays a pivotal role in the Komatsu PC120-6’s hydraulic circuit by maintaining pressure levels within safe limits, protecting essential system components from overload and extending machine life.

In the world of heavy construction machinery, hydraulic systems serve as the beating heart, delivering the power and precision needed to perform even the most challenging tasks. Cranes and bulldozers—two essential types of heavy equipment—rely heavily on hydraulic components to function effectively. Among these components, hydraulic valves play a crucial role in regulating fluid flow, controlling system pressure, and managing directional movements.

As a trusted manufacturer of hydraulic valves and cartridge valves, Ningbo Longerfa Hydraulic Co., Ltd. understands the complexities and evolving demands of the construction and machinery industry. In this article, we explore the various types of hydraulic valves commonly used in cranes and bulldozers, helping procurement specialists, engineers, and OEMs make informed decisions about their hydraulic solutions.

In the world of modern hydraulic systems, cartridge valves are essential components that directly affect system efficiency, reliability, and performance. Whether you are designing an excavator's hydraulic circuit or upgrading existing machinery, choosing the right hydraulic cartridge valve is critical.

At Ningbo Longerfa Hydraulic Co., Ltd., we understand the importance of precision and durability in hydraulic components. As a professional manufacturer specializing in construction machinery valves and cartridge valves, we help customers worldwide achieve optimal performance in their hydraulic systems.

This article offers expert insights into how to select the right hydraulic cartridge valve for your application—and how partnering with a trusted supplier like Longerfa can make all the difference.

Hydraulic cartridge valves play a vital role in the operation and control of heavy-duty machinery across multiple industries. At Ningbo Longerfa Hydraulic Co., Ltd., we specialize in the production of threaded cartridge valves, hydraulic valve blocks, hydraulic valve groups, and a wide range of hydraulic accessories that are essential for high-performance systems. Our products are widely recognized for their reliability and precision, and are extensively used in power units, hydraulic elevators, injection molding machines, plate shears, bending machines, and other critical applications.

In this article, we explore how hydraulic cartridge valves, especially those manufactured by Longerfa Hydraulic, are applied in real-world industrial environments, and how they contribute to efficiency, safety, and innovation in heavy-duty machinery.