380B Secondary Vertical Damper

Hydraulic dampers produced in our facility undergo 100 percent type-testing matrices to completely eliminate field failure risks under complex heavy-load conditions.

Symmetric Vertical Force Balance: Yields a well-calibrated damping force of 4.35 kN for both the extension and compression strokes at a nominal velocity of 0.01 meters per second. For high-speed operational limits of 0.150 meters per second, the force scales perfectly to a controlled 15.90 kN.

Strict Asymmetry Rate Limit: The performance variance between extension and compression damping forces is strictly held within 10 percent or lower. This is calculated by finding the absolute difference between extension and compression forces, dividing it by their total combined sum, and multiplying by 100 percent.

Dynamic Stiffness Control: Tested under a constant vibration frequency of 7 Hz and a physical displacement amplitude of plus or minus 1 millimeter, the overall dynamic stiffness is held firmly between 13 MN/m and 16 MN/m.

Environmental Thermal Resilience: Operates continuously without oil seal or valving failures from extreme environmental cold at minus 40 degrees Celsius up to ambient heat of plus 70 degrees Celsius, with a local temperature tolerance margin of plus or minus 2 degrees. Internal oil seals, flexible dust bellows, and rubber joints maintain full structural elasticity without any cracking or fluid leaks.

Low-Frequency Fatigue Endurance: Successfully passes extreme fatigue endurance trials at a frequency of 2 Hz and a stroke amplitude of plus or minus 3 millimeters for 4,000,000 continuous testing cycles, exhibiting a total final damping force degradation of less than 10 percent.

Hydraulic dampers from our enterprise cover the full product spectrum required by modern rail transport grids, cargo networks, and rapid urban transit operators.

High-Speed Rail Fleets: Full supply of secondary vertical dampers, secondary lateral dampers, primary vertical dampers, and anti-yaw (anti-hunting) dampers for high-speed trains.

Urban Mass Transit Networks: Precision-tailored vertical and horizontal vibration absorption components built for heavy subways, city metros, and urban light rail bogies.

Conventional Train Fleets: Heavy-duty shock absorber models engineered for long-haul passenger coaches, high-load main locomotives, and heavy freight wagons.

Track Construction Machinery: Industrial-grade specialized damping systems custom-fitted for massive ballast tamping machinery and large-scale railway line maintenance vehicles.

1.Hydraulic dampers vary across rolling stock designs. Can your facility support custom-tailored manufacturing or re-engineering paths?

Yes, we provide two flexible custom procurement tracks to fit your fleet. We can manufacture entirely new, custom-tailored models based on your engineering drawings, or we can engage in standardized re-engineering and performance upgrades on existing train platforms to extend asset operational life.

2.What credentials does your testing laboratory hold to ensure the structural quality of your train shock absorbers?

Our state-of-the-art railway damper laboratory holds dual CNAS and CMA national certifications. In terms of testing precision, equipment advanced level, and research data accuracy, our facility stands at the absolute forefront in China, perfectly benchmarking with elite national research institutes like the China Academy of Railway Sciences and Southwest Jiaotong University.

3.What is your enterprise's historical background in China's high-speed railway component sector?

We are proud to be the very first private enterprise in China to successfully pass the official EMU component certification for high-speed passenger trains operating at speeds of 300 km/h and above. This historic milestone breaks long-standing monopolies and validates our top-tier engineering authority.

4.How competitive is your pricing structure compared to European international OEM brands?

Because we maintain complete control over our manufacturing lines and operate a highly optimized, fully localized raw material supply chain in China, we can provide superior pricing advantages. Furthermore, we support long-term cooperation frameworks with a tiered discount structure, meaning longer partnerships automatically unlock deeper contract savings.

5.Do you offer both brand-new product manufacturing and technical maintenance overhaul programs?

Yes, to help railway transit operators reduce overall lifecycle costs, we provide a complete dual-track model consisting of brand-new build manufacturing and professional overhaul maintenance services. Our overhauled dampers pass through the exact same CNAS and CMA test matrices, guaranteeing that their performance, safety, and reliability are 100 percent identical to brand-new units while offering significant cost efficiency for the fleet.

6.Can your custom manufacturing capabilities cover all specialized types of railway dampers?

Yes, relying on our advanced laboratory with dual CNAS and CMA certification, we can custom manufacture every single model for high-speed rail, subways, light rails, conventional locomotives, passenger coaches, freight cars, and massive track maintenance machinery. This covers all variations including anti-yaw dampers, traction motor dampers, vertical dampers, and lateral dampers.

7.Are your suspension hydraulics components prepared for next-generation ultra-fast railway projects?

Yes, we are already leading the way for next-generation faster lines. Demonstrating our deep expertise, the custom dampers we engineered for the advanced CR450 project—which is currently China’s fastest next-generation high-speed rail platform—have already successfully entered the real-world track testing phase.

8.What warranty assurances and technical after-sales support do you extend to international clients?

Every single damper shipped from our facility comes backed by full factory warranty terms and completely traceable type-test data summaries. We provide immediate remote engineering support for your technical team during installation, and can establish specialized localized service frameworks for long-term fleet contracts.

9.Can transit authorities place a small-scale trial order before committing to major supply agreements?

Yes, we fully welcome small-batch trial orders for testing. We highly value risk management for railway operators, allowing you to install our dampers on a section of your local line, match the data against your local rail dynamics, and experience our stable product quality firsthand before entering massive procurement contracts.

10.Who are your ideal global cooperative partners, and can we arrange a physical factory audit?

We are looking to build long-term, win-win relationships with global regional railway parts distributors, national railway ministries, and urban metro operating authorities. We welcome partners to co-develop unique localized dampers, and we warmly welcome overseas engineering delegations and auditors to visit our factory to witness our advanced laboratory and automated assembly lines in action.

Hydraulic dampers represent the absolute frontline of railway safety, and our facility approaches their production with the highest degree of engineering respect. As an experienced, established, and fully certified high-speed rail supplier in China, our team guarantees flawless manufacturing precision, stable batch supply capacity, and complete after-sales transparency. Partner with our engineering team to systematically optimize your rolling stock lifecycle costs while keeping safety at 100 percent. Contact our international sales desk today to request a detailed quote or to coordinate a physical factory audit.