The selection of traps is different for different types. Let's take a look at it. The selection of traps is very important. It is not as simple as selecting the diameter of the trap according to the diameter of the pipeline. to the best effect of the trap. First of all, the form of the trap is different, the operating principle is also different, and the applicable conditions are also different. It includes: floating ball type, inverted bucket type, thermodynamic type, thermostatic type, etc. Therefore, when selecting a trap, the following should be considered Elements: 1. Occasion of use 2. Connection method 3. Maximum and minimum load 4. Steam temperature 5. Equipment type 6. Whether with temperature control 7. Steam system pressure 8. Whether condensed water is recovered 9. Pressure difference 10. Material 11 .The height after the trap 12. Back pressure 13. Whether to install an emptying device 14. Safety factor 15. It looks complicated above the ambient temperature, in fact, the most important thing is to see the detailed use, the above various forms of trap operation The principle is different, and the applicable occasions are also different. Therefore, the most suitable type of trap must be selected according to the characteristics of process drainage. In fact, consider the pressure, displacement and other factors. Otherwise, put the cart before the horse, even if the drainage volume of the trap can meet the requirements, it may not guarantee the normal drainage of the equipment.