LWS vertical shell type steam boiler: 
1.Containing no water pipes or fire tubes, which is exempt from exploding of tubes 
2.Boiler will not burn because of scaling, which reduces the maintenance cost; 
3.The upper ring large steam room and separation measures for boiler and steam below water can ensure the availability of high-quality steam; Double W-shaped four-pass has big heat transfer coefficient and full heat exchange, low exhaust temperature, high thermal efficiency and long service life. (Patent is protected) 
4.The vertical structure is compact and beautiful, which saves space and easy for installation.