Ningbo Longerfa Unveils High-Performance ARV 276Bar@40L 25/973408-JCB Valve for JCB Equipment

Tailored for Excellence: The 25/973408-JCB Valve Explained

The ARV 276Bar@40L 25/973408-JCB is a custom-designed auxiliary Relief Valve (ARV) rated to handle 276 Bar (4000 psi) of pressure and a flow rate of 40 liters per minute. Engineered to meet the demanding operating environments of JCB machinery, this valve ensures system stability and safeguards critical Hydraulic Circuits against pressure spikes — a frequent occurrence in rugged applications like earthmoving, demolition, and mining.

Key specifications of the valve include:

• Model: 25/973408-JCB

• Type: Auxiliary Relief Valve (ARV)

• Working Pressure: 276 Bar

• Flow Rate: 40 L/min

• Mounting: Direct-fit OEM replacement

• Applications: Hydraulic control systems in JCB backhoes, excavators, and loaders

Designed as a direct replacement for the OEM JCB 25/973408 valve, the Longerfa version offers perfect dimensional accuracy and sealing integrity, ensuring easy integration with original equipment.

Why Pressure Relief Matters in Hydraulic Systems

Auxiliary relief valves play a pivotal role in hydraulic circuit protection. Their primary function is to regulate excess pressure by allowing hydraulic fluid to bypass certain areas when pressure exceeds preset limits. In doing so, they protect pumps, actuators, and other sensitive components from failure due to overpressure, ensuring the entire system operates safely and efficiently.

The ARV 276Bar@40L provides fast response times and minimal hysteresis — critical parameters in construction environments where instant pressure modulation can mean the difference between optimal performance and costly breakdowns.

“Overpressure incidents can lead to catastrophic failures in hydraulic systems,” said Mr. Wang Lei, Chief Engineer at Ningbo Longerfa. “By integrating our precision-machined ARV with high-strength internals and advanced sealing materials, we’ve engineered a valve that provides reliable pressure control without compromising flow dynamics.”

Superior Materials & Manufacturing Excellence

The 25/973408-JCB valve is crafted using high-strength alloy steel with a proprietary heat treatment process that ensures long-term durability, even under continuous stress cycles. All components undergo CNC machining for micron-level tolerances, followed by rigorous 100% testing to verify crack pressure, leakage resistance, and flow characteristics.

To meet global market standards, the valve is subjected to:

• Hydraulic endurance testing (1 million+ cycles)

• Salt spray resistance testing (up to 96 hours per ISO 9227)

• Crack pressure calibration using in-house high-pressure benches

Each valve is serialized and traceable, offering end users the assurance of product consistency and technical accountability.

Seamless Integration with JCB Equipment

Ningbo Longerfa’s 25/973408 valve is designed for plug-and-play compatibility with a wide range of JCB construction equipment models, particularly the 3CX and 4CX backhoes. With OEM-style threads and port placements, installers can replace original valves with no modifications required, reducing downtime and labor costs.

Additionally, Longerfa offers technical support and custom engineering services for distributors and OEMs seeking tailored valve characteristics for regional conditions or specific machine configurations.

Global Reach with Local Precision

Founded in 2004, Ningbo Longerfa has grown from a domestic manufacturer into a globally recognized supplier of hydraulic components. The company operates a 12,000-square-meter factory equipped with automated production lines, advanced test benches, and an R&D center dedicated to product innovation and performance enhancement.

Currently, Longerfa exports to over 40 countries, serving clients in Europe, Southeast Asia, South America, and the Middle East. By offering OEM-quality components at competitive prices, the company has become a trusted partner to equipment manufacturers, dealers, and maintenance service providers worldwide.

Environmental & Energy Efficiency Benefits

In addition to performance and reliability, the ARV 276Bar@40L valve contributes to hydraulic energy optimization. Its finely tuned internal geometry minimizes flow resistance and internal leakage, helping operators reduce fuel consumption and system wear over time.

This aligns with Longerfa’s ongoing commitment to sustainable engineering and its ISO 14001-certified manufacturing process, which emphasizes waste reduction, energy efficiency, and environmentally friendly materials.

Available Now

The ARV 276Bar@40L 25/973408-JCB hydraulic valve is now in full production and available for immediate global shipment. Bulk ordering options and private-label services are available for distributors and OEM partners.

For more information, including datasheets, pricing, and technical specifications, please visit Ningbo Longerfa’s official website or contact the sales team directly at [sales@longerfa.com].

About Ningbo Longerfa
Ningbo Longerfa Hydraulic Technology Co., Ltd. is a professional manufacturer of hydraulic valves for construction machinery, focusing on quality, innovation, and customer satisfaction. With over two decades of industry experience, Longerfa provides high-performance solutions for excavators, loaders, bulldozers, and agricultural machinery. The company’s core values center around precision manufacturing, reliability, and international service excellence.