在搅拌与不锈钢反应釜结合处密封的选择对于密封效果、使用安全、节约成本等都显得特别重要。填料密封价格较便宜，但只适合较普通的使用条件和物料;单机封价格适中，可以在大多数使用条件下通用;双机封价格较贵，但在苛刻的工作条件下必须使用所以要明确密封选择的依据：
1.首先要明确密封选择的依据：是釜内的工作压力，第二是工作物料的性质。还有一个就是设备的工作温度。
2.其次要明确不锈钢反应釜所用密封的类别：反应釜所用密封即通常所说的轴封有两类，是填料密封，第二是机械密封，机械密封又分为单机封(即单端面机械密封)和双机封(即双端面机械密封)，单机封全套还包括水夹套，双机封则较为复杂，除水夹套(必须有循环冷却水)外，还包括配套的支架、平衡罐等。
3.如何选择合适的密封：在常温常压，物料没有挥发性也不易燃易爆的使用条件下，要选择填料密封;在压力小于4公斤，物料的易挥发性和易燃易爆性一般的使用条件下，就要选择单机封;在工作压力很过4公斤(但要小于10公斤)，物料的易挥发性和易燃易爆性很强的使用条件下，则必须选择双机封。
4.各种密封的优缺点：填料密封价格较便宜，但只适合较普通的使用条件和物料;单机封价格适中，可以在大多数使用条件下通用;双机封价格较贵，但在苛刻的工作条件下必须使用。
On the choice of mixing and sealing in reaction kettle attaches to the sealing effect, use safety, and cost savings appear particularly important.1. First of all, the basis of a clear seal choice: the first is the working pressure inside the kettle, the second is the nature of the work material.Another is the working temperature of the equipment.2. Secondly, we must make clear the category of stainless steel used in the reaction kettle seal: the shaft seal used in reaction kettle seal known as there are two kinds, the first is packing seal, the second is the mechanical seal, mechanical seal is divided into single seal (that is, the single mechanical seal) and double machine (i.e., double mechanical seal), single machine complete set also includes water jacket, double machine seal is more complex, in addition to the water jacket (must have a circulating cooling water), also include supporting bracket, tank, etc.3. How to choose the suitable seal: at atmospheric pressure, no volatile and flammable and explosive materials under the conditions of use, should choose packing seal;In pressure is less than 4 kg, volatile and flammable and explosive materials easily under general conditions of use, will choose single seal;In the pressure of work more than 4 kg (but less than 10 kg), volatile and flammable and explosive materials easily under the condition of the use of the strong, must choose double machine.4. The advantages and disadvantages of all kinds of sealing: packing seal the cheapest price, but only for the use of the most common conditions and materials;Single price moderate, gm can be used in most condition;Double machine most expensive, but must be used under harsh working conditions.
