Wheel excavator hydraulic brake filling valve (pre-fill valve)

Flag-up 81130377 series hydraulic brake filling valve pre-fill valveis a large-bore, pilot-operated check valve designed for high-flow applications. Its primary role is to facilitate the rapid filling and emptying of large hydraulic cylinders during fast-advance and return strokes.

By allowing oil to flow via gravity or vacuum from an overhead reservoir, it enables high-speed movement without requiring massive pumps. Once the cylinder meets resistance, the valve closes, allowing the main pump to build high pressure for the working stroke.


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Advantage

1.Two way oil

2.Significant Energy Efficiency

3.Increased Cycle Speed

4.Reduced Heat Generation

5.Shock Absorption and Decompression

6.Leak-Free High Pressure

7.Proportional Control

8.Accompany with cartridge valves

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WHY CHOOSE US

EXPERIENCED

QUALITY

R&D

We have more than 15 years of experience in this item.

Introduce well-known brand processing equipment and provide QC reports.

Our R&D team consists of 10-20 people, most of whom have about 10 years of work experience.

OUR CERTIFICATES

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Quality Control Equipment

To ensure the quality of factory products,we introduce advanced cleaning and component testing instruments, 100% of the assembled products pass factory testing and the test data of each product is saved on a computer server.

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R&D team

R&D team

Our R&D team consists of 10-20 people, most of whom have about 10 years of work experience.

Our R&D center has a sound R&D process,including customer survey, competitor research, and market development management system.

We have mature R&D equipment including design calculations, host system simulation, hydraulic system simulation, on-site debugging, product testing center, and structural finite element analysis.

OUR PARTNER

Over the past decade,as a trusted supplier, Ningbo Flag Hydraulic Co., Ltd. provides supporting equipment for large and powerful domestic enterprises such as Sunward Intelligent, XCMG, Sany Heavy Industry, and Zoomlion.

 

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