LX Gas/Low NOx Series Low and High Pressure Steam Boiler Miura’s Ultra Low NOx Steam Generator uses the most advanced technology. The flat shaped burner and the rectangular shaped boiler vessel are uniquely designed for the reliable low NOx. 5 minutes from cold start to full pressure. Ultra Low NOx gas burner with “Quenched flame”. Up to 300HP per boiler and up to 4,500HP (150,000lb/hr) with our MI-system. 170 PSIG and 15 PSIG MAWP available. MIURA’s exclusive “low water content, water tube” design is the most versatile boiler available in the marketplace today. A once-through, forced circulation steam boiler producing steam in just 5 minutes while maintaining an 85% fuel-to-steam efficiency.