{"product_id":"lev108-guide-on-reverse-jet-filters-copy-copy-1","title":"LEV101 CNC Plasma Tables  LEV Application and Performance Appraisal","description":"\u003cp data-start=\"202\" data-end=\"471\"\u003eCNC plasma cutting is widely used across fabrication workshops, manufacturing plants, automotive restoration, education, and engineering environments. It is fast, accurate, and versatile — but it also generates significant quantities of hazardous airborne contaminants.\u003c\/p\u003e\n\u003cp data-start=\"473\" data-end=\"797\"\u003eDuring cutting, the plasma arc vaporises metal and surface coatings, producing a mixture of fine fume, metallic particulate, gases, and dust. Depending on the materials being processed, this may include hazardous substances such as hexavalent chromium, manganese, nickel compounds, zinc oxide, ozone, and oxides of nitrogen.\u003c\/p\u003e\n\u003cp data-start=\"799\" data-end=\"952\"\u003eWithout effective Local Exhaust Ventilation (LEV), these contaminants can quickly enter the operator’s breathing zone or contaminate the wider workplace.\u003c\/p\u003e\n\u003cp data-start=\"954\" data-end=\"1157\"\u003eDespite the widespread use of CNC plasma tables, the extraction systems serving them are often poorly understood, inconsistently maintained, or difficult to assess during a Thorough Examination and Test.\u003c\/p\u003e\n\u003cp data-start=\"1159\" data-end=\"1248\"\u003eThat’s exactly why I wrote \u003cstrong data-start=\"1186\" data-end=\"1247\"\u003eLEV101: CNC Plasma Cutting Tables – A Practical LEV Guide\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"1250\" data-end=\"1291\"\u003eA Practical Field Guide for LEV Engineers\u003c\/p\u003e\n\u003cp data-start=\"1293\" data-end=\"1466\"\u003eLEV101 has been written specifically for professionals carrying out \u003cstrong data-start=\"1361\" data-end=\"1420\"\u003eCOSHH Regulation 9 Thorough Examination and Test (TExT)\u003c\/strong\u003e inspections on CNC plasma extraction systems.\u003c\/p\u003e\n\u003cp data-start=\"1468\" data-end=\"1587\"\u003eThis guide focuses on the practical challenges commonly encountered when assessing plasma table LEV systems, including:\u003c\/p\u003e\n\u003cul data-start=\"1589\" data-end=\"2180\"\u003e\n\u003cli data-section-id=\"xrpu1b\" data-start=\"1589\" data-end=\"1664\"\u003eUnderstanding the CNC plasma cutting process and contaminant generation\u003c\/li\u003e\n\u003cli data-section-id=\"1voay7\" data-start=\"1665\" data-end=\"1764\"\u003eCommon plasma table configurations including open bed, enclosed, and partially enclosed systems\u003c\/li\u003e\n\u003cli data-section-id=\"ik9an2\" data-start=\"1765\" data-end=\"1873\"\u003eHood arrangements such as under-torch extraction, damper-controlled sections, and open under-bed designs\u003c\/li\u003e\n\u003cli data-section-id=\"1bfnr61\" data-start=\"1874\" data-end=\"1938\"\u003eReverse jet filtration systems and common performance issues\u003c\/li\u003e\n\u003cli data-section-id=\"yssrvv\" data-start=\"1939\" data-end=\"2007\"\u003eFire and explosion considerations associated with metallic dusts\u003c\/li\u003e\n\u003cli data-section-id=\"kwvd1v\" data-start=\"2008\" data-end=\"2107\"\u003ePractical airflow testing, duct traverses, differential pressure checks, and filter assessments\u003c\/li\u003e\n\u003cli data-section-id=\"1yvxdyt\" data-start=\"2108\" data-end=\"2180\"\u003eQualitative testing using tracer smoke and live cutting observations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2182\" data-end=\"2360\"\u003eUsing diagrams, schematics, and practical field-based guidance, the guide helps engineers understand not just how these systems are supposed to work — but how they commonly fail.\u003c\/p\u003e\n\u003cp data-start=\"2362\" data-end=\"2376\"\u003eWhy It Matters\u003c\/p\u003e\n\u003cp data-start=\"2378\" data-end=\"2482\"\u003eCNC plasma extraction systems can present unique challenges compared with more conventional LEV systems.\u003c\/p\u003e\n\u003cp data-start=\"2484\" data-end=\"2506\"\u003eCommon issues include:\u003c\/p\u003e\n\u003cul data-start=\"2508\" data-end=\"2800\"\u003e\n\u003cli data-section-id=\"u3jzkl\" data-start=\"2508\" data-end=\"2560\"\u003eblocked extraction zones beneath the cutting bed\u003c\/li\u003e\n\u003cli data-section-id=\"5fmpnw\" data-start=\"2561\" data-end=\"2591\"\u003efailed or sticking dampers\u003c\/li\u003e\n\u003cli data-section-id=\"1xzb20w\" data-start=\"2592\" data-end=\"2643\"\u003ecollapsed flexible hoses on under-torch systems\u003c\/li\u003e\n\u003cli data-section-id=\"1413cl2\" data-start=\"2644\" data-end=\"2703\"\u003einadequate transport velocities causing dust settlement\u003c\/li\u003e\n\u003cli data-section-id=\"12ta2t0\" data-start=\"2704\" data-end=\"2747\"\u003eoverloaded or failing cartridge filters\u003c\/li\u003e\n\u003cli data-section-id=\"f555p9\" data-start=\"2748\" data-end=\"2800\"\u003epoor airflow distribution across large bed areas\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2802\" data-end=\"2972\"\u003eEven where airflow readings initially appear acceptable, poor hood design, maintenance failures, or filtration issues can significantly reduce actual contaminant control.\u003c\/p\u003e\n\u003cp data-start=\"2974\" data-end=\"3229\"\u003eLEV101 helps practitioners approach plasma systems with greater confidence by providing practical guidance on what to inspect, what to measure, what commonly goes wrong, and how to determine whether the system is likely to adequately protect the operator.\u003c\/p\u003e\n\u003cp data-start=\"3231\" data-end=\"3464\"\u003eWhether you are an LEV engineer, occupational hygienist, consultant, or competent person involved in LEV testing, \u003cstrong data-start=\"3345\" data-end=\"3464\"\u003eLEV101 is designed to be a practical companion guide for assessing CNC plasma extraction systems in the real world.\u003c\/strong\u003e\u003c\/p\u003e","brand":"LEV Academy","offers":[{"title":"Default Title","offer_id":52699792802131,"sku":null,"price":50.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/3313\/8771\/files\/Screenshot_2026-05-04_220110.png?v=1777928506","url":"https:\/\/www.levacademy.co.uk\/products\/lev108-guide-on-reverse-jet-filters-copy-copy-1","provider":"LEV Academy","version":"1.0","type":"link"}