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From Direct Heating to Indirect Heating: The Technological Evolution of Commercial Stainless Steel Steam Jacketed Kettles

Release time:2025-12-31


 

During the phase of focusing on the large-scale catering and collective meal supply equipment market, mainly promoting water boilers and other products, we gained opportunities for in-depth cooperation with overseas customers at various exhibitions and through foreign trade business expansion, relying on our solid stainless steel equipment manufacturing capabilities. Many foreign customers took the initiative to seek our OEM (Original Equipment Manufacturing) services, and we have always adhered to an open, cooperative and win-win learning attitude, actively working with overseas partners to tackle technical challenges. Based on the existing technology of water boilers and water buckets, and combined with the diversified functional needs proposed by overseas customers, we jointly optimized, upgraded and improved the equipment, ultimately iterating and refining a basic heating device into a commercial Stainless Steel Steam Jacketed Kettle that meets the core needs of the food processing industry. With the deepening of cooperation, our service scope has gradually extended to the food processing industry, initiating the transformation from catering equipment to industrial-grade food processing equipment.

Faced with the industrial needs of batch stewing, boiling and marinating in food processing factories, the pain points of traditional direct heating equipment have become increasingly prominent—high energy consumption, easy sticking and scaling, and uneven heating of ingredients have become key factors restricting production efficiency. This Stainless Steel Steam Jacketed Kettle, integrating the wisdom of Sino-foreign cooperation, is precisely developed to solve these pain points, with its core innovation lying in the fundamental reform of the heating method.

I. Core Technology: Structure and Principle of Indirect Heating

The core difference between this Stainless Steel Steam Jacketed Kettle and traditional direct heating equipment lies in abandoning the direct heating mode where heating tubes directly contact water or ingredients, and adopting a more efficient and gentle indirect heating technology. Its core structure and working principle embody our dual considerations of heat energy utilization and food processing needs:

 

  • Three-layer composite structure design: The kettle body is composed of an inner tank, an intermediate jacket layer and an outer insulation layer. The inner tank is made of food-grade stainless steel to ensure the safety of food contact; between the inner tank and the outer layer, a steam circulation layer and a PU polyurethane insulation layer are arranged; the bottom of the kettle body is equipped with a water inlet and a water outlet to facilitate the water circulation maintenance in the jacket layer.

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  • Indirect heating workflow: During use, water is first injected into the bottom jacket layer, and the water in the jacket layer is heated by heating tubes to convert it into high-temperature steam. After the steam fills the jacket layer, it evenly transfers heat to the inner tank to achieve gentle heating of ingredients; the outer PU insulation layer firmly locks heat to avoid heat loss and continuously maintain a stable temperature inside the kettle.

II. Four Core Advantages: Adapting to Industrial Production Needs

Compared with traditional direct heating equipment, the advantages of this Stainless Steel Steam Jacketed Kettle are reflected in four core dimensions, accurately matching the industrial demands of the food processing industry:

 

  1. High Energy Efficiency, Reducing Production Costs: The energy conversion of the equipment follows the cycle logic of "water → steam → water". Water stores a large amount of heat energy during vaporization and releases heat during condensation. This heat storage and release characteristic greatly reduces energy consumption loss caused by repeated heating, significantly improving energy efficiency compared with traditional direct heating equipment. It is especially suitable for the long-term, large-batch production needs of food processing factories.

  2. Clean and Hygienic, Lowering Equipment Maintenance Costs: The heating tubes have no direct contact with the ingredients in the inner tank throughout the process, fundamentally avoiding the problems of sticking and scaling on the surface of the heating tubes due to ingredient adhesion. It not only ensures the cleanliness and hygiene of ingredients, but also reduces the frequency of equipment cleaning and descaling as well as maintenance costs, extending the service life of the equipment.

  3. Adapting to Plateau Environments, Breaking Altitude Restrictions: Aiming at the pain point that water is difficult to boil in plateau areas due to high altitude and low air pressure, the kettle body adopts a micro-pressure structure design. By increasing the pressure in the jacket layer, the boiling point of water is raised, ensuring that even in plateau areas, high-temperature steam can be stably generated to meet the temperature requirements for stewing and sterilizing ingredients, breaking regional usage restrictions.

  4. Integrated Kettle Body, Avoiding Ingredient Residues: The seamless integrated kettle body forming process is adopted, with no splicing gaps inside the kettle body. This design not only makes the ingredients heated more evenly, but also facilitates pouring materials, effectively preventing ingredients from remaining in gaps and breeding bacteria, complying with the hygiene standards of the food processing industry.

III. Diversified Product Matrix: Meeting Customized Needs

To adapt to the diversified production scenarios in the food processing industry, we have built a rich product matrix and provide comprehensive customized services to cover the core needs of different customer groups:

  • Classified by Installation and Operation Mode: Vertical Stainless Steel Steam Jacketed Kettles are suitable for continuous production at fixed workstations with strong stability; Tilting Stainless Steel Steam Jacketed Kettles can easily pour materials by mechanically controlling the tilting angle of the kettle body, greatly reducing manual labor intensity and improving production efficiency.

  • Classified by Heating Energy Source: Electrically Heated Stainless Steel Steam Jacketed Kettles can be used by connecting to a power supply, with precise temperature control and easy operation, suitable for factories with stable power supply; Gas-Fired Stainless Steel Steam Jacketed Kettles have high heating power and fast temperature rise, adapting to batch production scenarios with high requirements for heating speed.

  • Classified by Customized Functions: Agitators can be added to achieve uniform stirring of ingredients in the kettle, avoiding local overheating or precipitation and ensuring uniform taste of ingredients; Special cleaning faucets can be equipped to facilitate quick flushing of the kettle body after production and improve cleaning efficiency; Temperature control systems, pressure regulation systems, etc. can also be customized according to customer needs to create personalized food processing solutions.

 

Starting from the opportunity of overseas cooperative OEM, and iterating into an industrial-grade core equipment through independent R&D, the birth of the commercial Stainless Steel Steam Jacketed Kettle is the result of our open cooperation and continuous learning, as well as a profound response to industry needs. With indirect heating technology as the core, this equipment solves many pain points of traditional heating equipment, not only providing food processing enterprises with more energy-saving, hygienic and efficient production tools, but also demonstrating our transformation breakthrough from a "catering equipment manufacturer" to a "comprehensive food processing solution provider". In the future, we will still adhere to the concept of win-win cooperation, continue to deepen our efforts in technological innovation, and create value for more industry customers.