Profile: Q-Jet DSI, Inc. is a source for all types of direct steam injection process heating needs. Our mixing jet cookers and process heaters find a wide range of application in a diversity of industries, from cooking starches for coatings applications in the paper mill, to processing sauces & gravies in the food industry, to heating cleaning solutions for tank washing systems. Our product line includes process heaters, mixing jet cookers, tank heaters, gas injectors, heater skid systems and fluid systems.