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  1. Home
  2. Machine elements and parts
  3. ケーエヌエフ・ジャパン KNF JAPAN
  4. How is safety ensured in LNG propulsion for ships?
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  • Feb 04, 2025
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Feb 04, 2025

How is safety ensured in LNG propulsion for ships?

ケーエヌエフ・ジャパン ケーエヌエフ・ジャパン KNF JAPAN
Vessels powered by LNG are revolutionizing ship propulsion with cleaner and lower emissions technology. KNF's explosion-proof diaphragm pumps play a crucial role in ensuring safety through continuous leak testing of gas control systems, complying with strict ATEX specifications and marine certifications. Gas control systems utilizing explosion-proof diaphragm pumps must continuously monitor LNG supply and the controlled combustion process of large engines to ensure the reliability and safety of the integrated gas control system. For this reason, each safety module of the gas control system used is equipped with at least two diaphragm pumps, such as the KNF N680.1.2 Ex.
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船舶のLNG推進における安全性をどのように確保しているか.pdf[0]

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N_680-1-2_EX-CMYK-300dpi.jpg

Explosion-proof diaphragm gas pump N680.1.2 EX series

This is a promotional video for the latest explosion-proof diaphragm gas pump, the N680.1.2 EX series.

IECEx / ATEX compliant explosion-proof diaphragm gas pump

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KNF_N87_TTE_Ex_jpg.jpg

Explosion-proof gas pump, certified for explosion-proof standards.

Acquired Japan's explosion-proof certification, allowing safe use for sampling and gas transfer of flammable gases including hydrogen gas.

- Explosion-proof structure electrical machinery and equipment type certification passed - Increased safety explosion-proof structure, pressure-resistant explosion-proof structure - Motor division grade: Ex II 2G Ex h IIB+H2 T4 Gb

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N_630-15_EX-RGB-300dpi_jpg.jpg

KNF N630Ex Series Explosion-Proof Gas Pump

IECEx / ATEX certified explosion-proof pump can be used in environments with flammable gases. *This is not an explosion-proof certified product in Japan.

- Maximum allowable discharge pressure 12 bar (1.2 MPa) - Basic flow rate 30 l/min (50Hz) / 35 l/min (60Hz) - Corrosion-resistant specification SUS / PTFE - Robust design to withstand tough operating conditions - Leak-tight specification 6 x 10^-3 mbar x l/s

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KNF_N87_TTE_Ex_jpg.jpg

N87Ex Series Explosion-Proof Gas Pump

IECEx / ATEX certified explosion-proof pump can be used in environments with flammable gases. *This is not an explosion-proof certified product in Japan.

- Basic flow rate 7.5 l/min - Achievable vacuum level 140 mbar abs - Maximum allowable discharge pressure 1.5 bar (0.15 MPa) - Corrosion-resistant specification PVDF / PTFE - Robust design to withstand tough operating conditions - Leak-tight specification 6 x 10-3 mbar x l/s

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Related catalog(7)

KNF N87 Series Explosion-Proof Pump Explosion-Proof Certification Approved Product

KNF N87 Series Explosion-Proof Pump Explosion-Proof Certification Approved Product

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KNF N922 Explosion-proof Vacuum Pump 60Hz Specification Explosion-proof Certification Passed

KNF N922 Explosion-proof Vacuum Pump 60Hz Specification Explosion-proof Certification Passed

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KNF N922 Explosion-proof Vacuum Pump 50Hz Specification Explosion-proof Certification Passed Product

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KNF N922 Stainless Steel Explosion-Proof Vacuum Pump Explosion-Proof Certification Approved Product

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KNF N922 Stainless Steel Vacuum Pump & Compressor IP54

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KNF N922 Stainless Steel Vacuum Pump & Compressor IP20

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KNF N680.1.2 Ex Series Explosion-Proof Vacuum Pumps & Compressors

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[Cast Iron Repair] We will repair cracks that have occurred in metal equipment without applying heat.

  • NEW
  • CATALOG

The "Mechanical Stitching Method" by Nichinichisui Road Machinery Co., Ltd. is a new technique that allows for the repair of metal cracks without the application of heat. By using special bolts and reinforcement plates, cracks are physically removed, and repairs are made without causing any thermal impact on the base material. Repairs can be carried out in environments where open flames cannot be used. Since no heat is applied, the disassembly of equipment is minimized. ◎ For more details, please contact us. ◎ If a detailed technical explanation is needed, please contact us.

Oct 24, 2025

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Aluminum prototype: Lost wax casting sand mold layered 3D printer prototype.

  • NEW
  • COMPANY

● The production time for casting prototypes can be shortened! Since model production is not required, the time needed to create prototypes, which previously took about a month, can be significantly reduced. ● Model costs can be reduced! By directly producing sand molds from 3D data, there is no need for model production costs. If changes to the model are necessary, they can be addressed by modifying the 3D data. ● Similar products with different shapes and dimensions can be prototyped simultaneously! With one molding process, different products with similar shapes or varying dimensions can be molded at the same time. This allows for the verification of multiple types in a short period.

Oct 24, 2025

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【Metal Crack Repair】We repair cracks in metal products without applying heat.

  • NEW
  • CATALOG

The "Mechanical Stitch Method" by Nichinichisui Road Machinery Co., Ltd. is a new technique that allows for the repair of metal cracks without the application of heat. By using special bolts and reinforcement plates, cracks are physically removed, and repairs are made without causing any thermal impact to the base material. Repairs can be carried out in environments where open flames cannot be used. Since no heat is applied, the disassembly of equipment is minimized. ◎ For more details, please contact us. ◎ If a detailed technical explanation is needed, please contact us.

Oct 24, 2025

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[Cast Iron Crack Repair] We repair cracks in metal products without applying heat.

  • NEW
  • COMPANY

The "Mechanical Stitching Method" by Nichinichisui Road Machinery Co., Ltd. is a new technique that allows for the repair of metal cracks without the application of heat. By using special bolts and reinforcement plates, cracks are physically removed, and repairs are made without causing any thermal impact to the base material. Repairs can be carried out in environments where open flames cannot be used. Since no heat is applied, the disassembly of equipment is minimized. ◎ For more details, please contact us. ◎ If a detailed technical explanation is needed, please contact us.

Oct 23, 2025

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AAEON Industrial SMARC Module equipped with ARM MediaTek Genio 700/510 【uCOM-M700/M510】

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  • PRODUCT

Features: ● Equipped with ARM MediaTek Genio 700 / 510 ● Onboard LPDDR4 8GB ● HDMI 2.0 x 1, DP 1.4 x 1 ● eDP 2 lanes x 1, MIPI-DSI 4 lanes x 1 ● GbE x 1 ● USB 3.0 + 2.0 x 1, USB 2.0 x 5 ● UART x 4, GPIO x 12, MIPI CSI x 2, TPM 2.0 ● Fan-equipped heatsink, heatsink available separately ● Carrier board available separately

Oct 23, 2025

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