Our water tube boiler is such sort of kettle where the water is warmed inside cylinders and the hot gasses encompass them. This is the essential meaning of water evaporator. As a matter of fact, this boiler is the only inverse of flame tube boiler where hot gasses are passed through cylinders that are encompassed by water. The bigger surface can be accomplished in our water tube boiler by utilizing more quantities of water tubes. Due to convectional stream, development of water is a lot quicker than that of flame tube evaporator, thus the rate of warmth exchange is high that results into higher productivity.