Your country is not included? Please visit our global website Language 01/30/2025 How KNF Pumps Ensure the Safety of LNG Propulsion on Ships Modern advances in marine technology have made it possible for ships to run entirely on low-emission liquefied natural gas (LNG). KNF pumps already play a crucial role in ensuring the safety of this innovative propulsion technology. LNG-powered ships are revolutionizing marine propulsion with cleaner, low-emission technology. KNF's explosion-proof diaphragm pumps play a critical role in ensuring safety through continuous leak testing in gas control systems, meeting strict ATEX specifications and marine certifications. Revolutionizing Maritime Propulsion with LNG In recent years, the maritime industry has seen a significant shift towards cleaner propulsion methods. LNG-powered ships are a major step forward, offering a low-emission alternative to traditional heavy fuel oil. Explosion-proof KNF diaphragm pumps are already installed in the gas control lines of some of today's LNG-powered ships to ensure the reliability of continuous leak testing. Tighter Regulations for Seagoing Vessels Aim to Reduce Emissions Most of the world's more than 90,000 seagoing vessels still rely primarily on heavy fuel oil, a byproduct of crude oil refining. Compared to lighter fuels, these viscous oils contain significantly higher levels of pollutants such as sulfur and heavy metals. Recognizing the importance of cleaner propulsion options, the shipping industry is actively pursuing stricter regulations through innovative solutions that increasingly prioritize environmental concerns. A key regulation aimed at reducing sulfur emissions is the Sulfur Emission Control Area (SECA), which designates specific geographic regions where strict limits on sulfur emissions from ships are enforced. Another regulation focused on emissions control is the Decarbonization Emission Control Area (DECA), which targets greenhouse gas emissions, particularly carbon dioxide, from ships. Navigating the Regulatory Landscape The introduction of LNG-powered ships has set a new standard in the maritime industry. These ships, with their powerful new-generation engines, can run entirely on LNG at sea, resulting in the lowest possible emissions even when out of port. Gas Control Systems Feature Explosion-Proof Diaphragm Pumps To ensure reliable and safe operation of the integrated gas control system, the LNG supply and the controlled combustion processes for the large engines must be continuously monitored. For this reason, each safety module of the gas control system used is equipped with at least two diaphragm process pumps, such as the KNF N 680.1.2 Ex, which can be customized in close collaboration with the manufacturer of the supply system. The KNF N 680 1.2 Ex process gas pump can be customized to meet the demanding requirements of a gas control system. These modules are connected to an analysis unit that uses pressure and gas sensors to continuously monitor the air in the interstitial space of the double-walled gas pipe for traces of LNG. Even the smallest amounts of gas are reliably transported by the pumps so that any leaks can be detected immediately and appropriate action can be taken. ATEX and Marine Certified Compliance The flammable and explosive nature of LNG requires explosion-proof design of the systems used. Therefore, the KNF diaphragm pumps installed meet the ATEX specifications both internally and for the motor, making them suitable for use in potentially explosive atmospheres. In addition, the pump motors meet all required marine approvals and the pump heads are made of stainless steel to withstand the corrosive conditions of seawater. Typically, each gas control system is equipped with an identical second pump to ensure that reliable monitoring can be seamlessly bridged in the event of a unit failure. KNF diaphragm pumps contribute to the overall integrity and effectiveness of LNG gas control systems by being clean, reliable and easy to maintain. By ensuring the quality of the media being handled, they provide a proven solution that improves system performance and longevity while reducing downtime costs. Find out more about KNF process pumps! Contact Us Do you want to find out more about our customized pump solutions and service opportunities? Get in touch with our local sales representatives.