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Premium Remanufactured Bitzer 4NFCY Bus AC Compressor – Professional-Grade Core Rebuild for Heavy-Duty Commercial HVAC | 12V/24V R134a Available
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Product Overview
Hunan Weili Auto Parts Appliance Co., Ltd. holds an IATF 16949 certification and is widely recognized as a National High-Tech Enterprise and a provincial "Specialized and Sophisticated" (S3N) "Little Giant" in China's automotive sector. With over 17 years of engineering heritage in commercial vehicle thermal management, we provide high-performance remanufactured compressor solutions that authentically deliver OEM-like capability at a sustainable cost.
Our Remanufactured Bitzer 4NFCY compressor is meticulously rebuilt using a rigorous "Core Revival" process. Every unit undergoes complete disassembly, precision cleaning, and the replacement of all consumable components such as piston rings, bearings, oil seals, and gaskets. Worn-out rotating parts are restored to factory tolerances using advanced CNC machining. The result is a compressor that offers reliable cooling capacity, significantly lower energy consumption, and exceptional longevity, bridging the supply gap for high-demand commercial fleets.
Unlike low-grade aftermarket imitations, our unit is engineered to maintain the original design's thermodynamics and structural integrity. With our in-house R&D partnerships (including top-tier researchers from Tsinghua University and Hunan University), this remanufactured Bitzer is a strategically sound choice for bus fleet operators, commercial AC workshops, and international spare parts distributors looking for quality, affordability, and guaranteed consistency.
Technical Specifications (Hardcore Parameters)
We deliver transparent, industry-compliant specifications to help your engineering and procurement teams make an accurate selection.
| Bitzer 4NFCY Compressor Model: | |
| KV6 -647 cm Compressor, KV-6 /667 cm Compressor, KV6 /667 cm Compressor | |
| 4NFC Compressor, 4-NFC Compressor, 4 NFC Compressor | |
| Cylinder volume | -647 cm3 |
| Displacement(1450rpm) | -56,2 m3/h |
| Displacement(3000rpm) | -116,4 m3/h |
| No.of cylinder x bore x stroke | 4 x 70mm x 42mm |
| Allowed speed range | -500..3500 1/min |
| Weight(without clutch) | 33,0 kg |
| Magnetic clutch 12V or 24V DC | -LA16(Option) |
| Weight magnetic clutch | 10 kg |
| V-belts | 2 x SPB |
| Maximum pressure(LP/HP) | 19/28 bar |
| Connection suction line35 mm | -1 3/8' |
| Connection discharge line-35 mm | -1 3/8' |
| Oil type | R134aBSE 55(Option) |
| Oil charge | -2,5 dm3 |
| Crankcase heater | -70 W 12or 24V DC(Option) |
| Pressure relief valve | -Standard |
| Oil drier | -Option |
| Capacity control | -100-50%(Option) |
Key Performance Features of Our Rebuilt Unit:
Affordable Reliability: Offers up to 40-60% cost savings compared to purchasing brand-new OEM units, while preserving the renowned durability of the original Bitzer architecture.
Strict Rebuilding Protocol: Our 12-step remanufacturing process includes high-pressure helium leak testing (100%), ultrasonic degreasing, and dynamic rotation balancing to guarantee immediate plug-and-play performance.
Zero-Leak Guarantee: Equipped with upgraded Viton (FKM) seals that withstand extreme pressure and temperature changes, ensuring stable performance throughout its operation cycle.
Manufacturing Certifications & Comprehensive Strength
At Hunan Weili, refurbishment is treated as a high-precision engineering discipline. We proudly present our credentials to demonstrate our industry-leading standards:
Accredited Quality Management Systems
IATF 16949:2016 Automotive Quality Management Certification (The strictest global standard for automotive parts suppliers).
ISO 9001:2008 Standard International Quality Management Certification.
CE & RoHS Compliant to meet strict European safety and environmental regulations.
Recognized Status: National High-Tech Enterprise and Provincial "S3N Little Giant" Enterprise.
Independent Patents: Our parent technical base holds 4+6 Invention Patents and 17 Utility Model Patents, many of which are integrated into our testing and rebuilding processes to guarantee quality.
Advanced Production & Testing Facilities
Manufacturing Base: Strategically situated in the Jiuhua National Economic Development Zone, Xiangtan, within a 20,000+ square meter specialized factory area.
High-End Machinery: Automated CNC machining stations, ultrasonic cleaning lines, and precision dynamic balancers ensure the physical core meets "like-new" standards.
Internal Testing Lab: Features high-low temperature cycling chambers, noise reduction measurement rooms, and durability endurance test benches. Crucially, every single remanufactured compressor must pass a 100% final quality audit before it is cleared for global shipment.
International Sales Footprint: Our products are exported to over 50 countries and territories including the USA, Italy, Russia, South Korea, Middle Eastern nations, and various African regions, bringing in annual revenues exceeding 90 million RMB.
Expert R&D & Engineering Support
Founder & Strategic Lead: Founder Yang Hao (graduated from the University of Manchester, UK, and actively serves as a member of the Xiangtan CPPCC). Special Advisor Hu Mengjiao (Senior Researcher at the National Laboratory Center, Tsinghua University).
Industry-Academia Integration: Established a specialized long-term research collaboration with the College of Electrical and Information Engineering, Hunan University, focusing on compressor motor control and control system optimization.
Core Engineering Team: Our senior technicians and mechanical engineers are drawn from industry leaders such as Shanghai Brose Automotive Parts Co., Ltd. and the Nidec Corporation (Japan).
Diverse Application Scenarios
Our remanufactured Bitzer 4NFCY is a smart, sustainable core component for diverse thermal management systems:
Transit & Commercial Bus Air Conditioning: Highly suitable for established Chinese bus marques (Yutong, King Long, etc.) and a preferred option in export fleets to Africa, the Middle East, and Latin America.
Construction & Engineering Vehicle Cabins: Specifically robust against shock and dust, it is frequently installed in the HVAC units of heavy equipment including Zoomlion, SANY, XCMG, Sunward, and Liugong Aolan.
Refrigerated Transport & Cold Chain: A proven partner for Thermo King (USA) and Carrier (USA), playing a critical role in the refrigerated boxes of chilled food, dairy, and pharmaceutical logistics chains.
New Energy & Energy Storage Thermal Management: Adaptable to the rapid NEV evolution, supporting EV climate control, energy storage battery cooling systems, hydrogen fuel cell heat management, and auxiliary cooling for railway transit vehicles.
Global Authorized Agent & Distributor Recruitment
Capitalizing on our robust quality control and mature export channels, we are actively seeking partnership with aftermarket auto parts distributors, commercial AC specialist repair shops, fleet maintenance providers, and international supply chain wholesalers to serve as our Exclusive Regional Agents or Primary Tier-1 Dealers.
Why Choose Hunan Weili as Your Partner?
Sustainable Profitability: High-quality remanufactured products allow you to offer competitive pricing to your end customers while maintaining excellent gross margins. As a genuine rebuild manufacturer, we eliminate intermediate markups.
Faster Delivery & Inventory Security: Our factory retains a large physical inventory of both finished components and reusable cores. Standard models are processed and ready for delivery within 3 to 7 business days, significantly cutting your inventory turnaround time.
Bilingual After-Sales Technical Support: We offer a dedicated technical support team fluent in both Chinese and English to assist your local technicians with installation instructions, fault diagnosis, and quick response to any adaptation questions.
Absolute Regional Protection: Strict, enforceable territory mapping and a zero-tolerance policy for cross-regional "grey market" sales. We guarantee exclusive market rights for our official contract partners.
Sales Enablement Kits: We provide comprehensive, localized marketing materials, official IATF 16949 distributor certificates, and sample branding kits to support your participation in regional auto parts exhibitions.
If you command a strong local network in the commercial vehicle parts industry, or operate a successful bus/highway fleet maintenance facility, please reach out to us to establish your exclusive partnership for 2026 and beyond!
Contact Us Today
Hunan Weili Auto Parts Appliance Co., Ltd
Headquarters Address: No. 28, Jili West Road, Jiuhua Economic Development Zone, Xiangtan City, Hunan Province, China
Global Business Hotline (WhatsApp / WeChat): +86-18670382782
Landline: +86-0731-82034997 / 82034998
E-Mail: [email protected]
Official Global Websites:
www.cooliparts.com (Core Remanufacturing & Global Portal)
SEO Meta Description: Factory direct Premium Remanufactured Bitzer 4NFCY Bus AC Compressor. Rigorously rebuilt with IATF 16949 quality standards, 12V/24V R134a commercial vehicle HVAC parts. Fast global shipping. Agents and distributors wanted worldwide.
