Nagaoka’s Core Technology
“Nagaoka Screen”

Nagaoka Screen is known for its outstanding designs and technologies, clog-prevention structure, high slot opening ratio, rigid and precise welding, and multi-variation of shapes and materials. Nagaoka has become one of the few qualified internal suppliers in the world for a long term-supply of this reliable screen. Furthermore, Nagaoka Screen is also utilized in the groundwater intake field and has become a Japanese standard in the waterworks design. CHEMILES was developed to treat the groundwater collected by Nagaoka Screen. Winning IWA-PIA award in 3 successive competitions, shows the value of our water technologies. Nagaoka strive to deliver environmentally-friendly and practical solutions by combining Nagaoka Screen’s technology and new inventions.

NAGAOKA SCREEN INTERNALS FOR REFINING AND PETRO-CHEMICAL PROCESSING

  • ■ ADSORBENT CHAMBER INTERNALS
  • ■ CATALYST BASKET
  • ■ CATALYST SUPPORT BED
  • ■ CENTER PIPE
  • ■ SCALLOPS
  • ■ DISTRIBUTOR
  • ■ DISTRIBUTOR BASKET
  • ■ LIQUID DISTRIBUTOR TRAY
  • ■ COLLECTOR

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NAGAOKA WELL SCREEN FOR UNDERGROUND WATER COLLECTOR

  • ■ RING BASE SCREEN
  • ■ RING BASE COLLECTOR SCREEN
  • ■ RING BASE RADIAL SCREEN
  • ■ RING BASE INFILTRATION SCREEN
  • ■ WATER INTAKE SCREEN
  • ■ ROD BASE SCREEN
  • ■ CERA-COAT SCREEN
  • ■ PIPE BASE SCREEN

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FEATURES OF THE NAGAOKA SCREEN

  • POINT1Clog-prevention Structure

    NAGAOKA SCREEN, made out of triangular-shaped wedge wires and supporting rods, allows the gas and the liquid flow in the reactors smooth and efficient.

  • POINT2High Slot Opening Ratio

    Adjustable slot size offers high slot opening ratio compared with that of the conventional wire mesh and the slit pipes. High opening ratio encourages the higher efficiency in process and less clogging in the oil refineries, petrochemical plants and water intake (in case of water wells.)

  • POINT3Rigid and Precise Welding and Uniform Structure

    NAGAOKA offers unique continuous welding technology, ERW, which gives strength and accuracy in our products.

  • POINT4Multi-variation Shape and Material

    NAGAOKA produces a variety of screens ranging from a cylindrical- shape screen to a flat panel. NAGAOKA SCREEN, with reinforcement stiffeners and/or material alteration, offers high resistance to severe temperature and pressure.

Milestones of Technological Development of NAGAOKA

  • 1972 Nagaoka Screen
    Core-Technology

    • ●Enough strength to resist high temperature, high pressure and corrosion-prone condition.
    • ●Clog-prevention structure
    • ●High slot opening ratio
    • ●Durable design and material

  • 1975 Screen Internal

    • Foundation of manufacturing technology for screen basket

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  • 1980Screen for water intake
    Application of sand control technology

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  • 1997CHEMILES
    Fe removal, Mn removal, NH4+-N, As removal equipment

    Remove harmful substance such as iron, manganese, ammonia nitrogen contained in groundwater

    • ●Original sand control technology
    • ●Completely remove harmful substance by contact oxidation and biological treatment
    • ●Extremely high speed water treatment system

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  • 2014HiSIS
    High-speed Seabed Infiltration System

    Application of river-bed water intake technology to seawater intake

    • First pilot plant started in 2014
    • ●Seawater intake using seabed sand filtration
    • ●High-effective purification system without does of chemicals for seawater
    • ●Original sand control technology

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  • 2016AERSYS
    Low-Energy Aeration System

    Treating VOC/free carbon dioxide by applying special nozzles

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NAGAOKA’S QUALITY ASSURANCE

Standard Quality Control

All NAGAOKA’s products are designed, manufactured, inspected and shipped in accordance with the ISO9001/2008 quality management system.

  • Welding Quality

    The NAGAOKA SCREEN (Wedge Wire and Support Rod) welded by ERW (Electric Resistance Welding) has sufficient strength to satisfy various customer requirements. The performance of the welded parts has been analyzed and proven by macro, microphotographs and tensile strength tests.

  • Material Inspection by PMI

    PMI (Positive Material Identification) is performed to ensure the chemical composition of alloy materials confirming to the job requirement for materials used in the reactor internals.

  • Screen Slot

    The slot of the NAGAOKA SCREEN is well controlled to ensure accuracy by filler gauge and taper gauge.