LHS WNS Steam Boiler Series (Fuel/Gas-fired) Fully automatic control, digital screen display, different programs of controlling system to conduct the boiler working to meet various conditions in needs of customer. Automatic overload adjusting and water supply, also designed long-distance central controlling system and screen display for purpose of multi-boiler networks as customer needed. Multiple interlock safety devices, dual independent alarms of water line controller, triplex pressure protections and alarms, to assure boiler working safely in various working conditions. Under-burning machine, dual-returns structure, enlarged area of heat exchange, inner- installed current-interfering board of smoking pipe to increase the thermal efficiency, inner-installed separator of water and stream to ensure the quality of stream. Exclusive colorful armor plate, fiberglass casing, rustless surfaces. Adopted ?full-wetback? central returning-flame heating structure, makes more spaces in capacity of boiler and enlarged the radiant heating area, which maximized the heating area. Also the structure keep the back pipe board away from the high temperature sootiness, extend the life of boiler. 100% undulant boiler tank, screw thread casting smoke piping, good retractility. Scientific stream designs, keep the evenly temperature of boiler, effectively restrain the generation of Nox. Plus the reliable imported burner, makes the fuel burned completely, measure up the international standard of environment protection. Adopted movable door of smoke boxes in front and back, the body of boiler designed cleaning/maintains windows that makes maintains and cleaning convenient.