Zhengzhou Yunda Paper Machinery Co., Ltd., since 1981, is a high-tech company. With its broad portfolio of products and services, Yunda sets standards in the Pulp & Paper and Solid Waste Sorting industries. Yunda has approximately 300 employees covering business in more than 40 countries.

Green and Intelligent Manufacture

Yunda provides system solutions for fiber processing and pulp making, including Recycled Fiber Processing Lines, Virgin Fiber Stock Preparation Lines, High-yield Mechanical Pulping Lines (i-BCTMP), Approach Flow Systems, Bale Breaking and Sorting Systems, and Closed Screening Systems for Chemical Pulp Lines. The key products are Conveyors, Bale Breakers, Pulpers, Pressure Screens, Screen Baskets, Cleaners, Refiners, Agitators, Thickeners, Thermal Shredders (Pressurized Refiners), Pre-steaming Bins, Plug Screw Feeders, Thermal Softening Tubes, Cyclones, Reaction Towers, Bleaching Towers, and Screw Presses.

Engineering-Procurement-Construction (EPC), professional and thoughtful one-stop service for you

Yunda has enlarged its sales scope to all over the world. By solid foundation and skilled technology, professional technical talents and service team bring professional service to customers.

Company News & Industry Trends

  • 12

    11.2026

    3750 mm Drum Pulper Screening Zone Upgrade and Retrofit – Longyuan Paper Project
    1. Project Background Longyuan Paper’s 3750 mm drum pulper was experiencing several operational issues, including insufficient open screening area, limited production capacity, frequent rope formation in the pulping zone, high energy consumption, and an unreasonable equipment load distribution. To address these problems, our company carried out a targeted upgrade and retrofit of the screening zone…
  • 29

    10.2026

    Operation modes of hydrocyclones
    Hydrocyclones can be designed as counterflow or unidirectional flow according to the flow directions of the reject and accept relative to the inlet. In counterflow cyclones, the inlet and accept connections are at one side and the reject outlet is at opposite side. In unidirectional flow cyclones, the accepts and rejects connections are opposite the…
  • 14

    10.2026

    Yunda @ CIPTE 2026: Technical Seminar on New Technologies and Equipment
    The Yunda @ CIPTE 2026 technical seminar focused on the latest technologies and equipment developed by Yunda Paper Machinery, covering the following topics: 🎉🎉 Yunda Paper Machinery’s Successful Showcase at CIPTE 2026!
  • 29

    09.2026

    Basic physical principles of hydrocyclones
    As simple the basic design of a cleaner or hydrocyclone is as complex is the flow within such an apparatus. Figure 1 shows a sketch of the basic design parameters of a hydrocyclones. The fluid is pumped through the inlet and due to the geometry of the cleaner a rotating flow develops. In steady state…
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