Contact person Ye Xing, contact number Regarding the vacuum insulation of low-temperature storage tanks and Dewar tanks, first of all, you must make it clear that if your tank has leaks in the inner or outer layers, then vacuuming will only temporarily improve the insulation situation, but cannot completely solve it. question. Users who have the conditions to evacuate the storage tank are best to replace it with high-temperature nitrogen. The Dewar tank can be directly used as a small oven to heat it, so that the moisture inside can be taken away while vacuuming. The vacuum unit can be configured according to the user's needs. The configuration with the highest degree of vacuum is the front-stage rotary vane pump, Roots pump, diffusion pump, molecular pump. Generally, users of tanks do not need to use molecular pumps, as long as all pipes are leak-free and the vacuum The degree is very good. Vacuum measurement can use a composite vacuum gauge, which first uses a resistance gauge or thermocouple gauge to measure low vacuum, and then automatically switches to using an ionization gauge to measure high vacuum.
This system is a method and device for heating the low-temperature insulated container during the vacuum process. A heating method for vacuuming low-temperature insulated containers. While heating the container, the interlayer of the container is evacuated at the same time. The heating can be performed both inside and outside the container. The method is: 1. First turn on the chip selection vacuum pump. When the vacuum is lower than the Roots vacuum pump, the interlayer of the low-temperature insulated container enters pre-evacuation. The preheating temperature is ℃ and the pre-evacuation time ~ 2. When the vacuum degree reaches ↑［], switch to Pumping high vacuum is carried out continuously with pre-pumping. During the operation, first close the pre-pumping valve, then open the front valve, and finally open the high valve. ③ Pump high vacuum. The initial vacuum degree is ↑［], and the heating temperature is ℃~℃ ④Heating temperature is ℃, and it continues to pump ~ since the pre-pumping stage, and the vacuum degree reaches ↑[]. The built-in heating method and its device are suitable for almost all specifications of containers, and have significant advantages in heating efficiency and energy saving.
Our company produces Dewar tank vacuum visual vacuum joints. One end of this joint is a molded sealing ring that is tightly sleeved on the outer circle of the vacuum port. The other end is a pull rod with a handle and a tee. The other end is connected to the vacuum unit. Pull out the stopper of the vacuum port of the Dewar bottle, which can be seen during the entire vacuuming process, and then push the stopper in after the vacuum is drawn. The unit will extract the ultimate vacuum without leakage in the pipeline. Can reach ×.
Dewar vacuum flask price