1. It can balance the circulating pressure and injection pressure between material barrels.  
2. Isolate the air, mainly isolate the moisture in the air.  
3. Make the feed tank fully feed the raw material pump.  
4. When there are a lot of raw materials in the tank, pressurization is helpful to remove the residues, and the sealing problem needs to be solved at the same time, otherwise the raw materials will deteriorate due to the slightly long time of air entering the tank, especially the isocyanide ester is particularly sensitive to water, so try to feed in time and use it up in time. Drying device shall be equipped on the feed tank to prevent the influence of water on raw materials. In order to reduce energy consumption, a thermal insulation layer is generally installed on the outermost layer of the material tank.  
 
Structural features of low pressure foaming machine:  
1. Sandwich bucket, good thermostatic effect.  
2. PLC touch screen and man-machine interface operation panel are adopted, which is convenient to use and the operation of the machine is clear at a glance.  
3. The mixing head adopts a new mixing mechanism to mix evenly. Low noise, strong and durable.  
4. Imported pump, accurate metering.