The horizontal pump is horizontally arranged (the liquid inlet pipe is lower than the liquid discharge pipe), and heating gas (set behind the pump or in front of the filter in front of the pump to prevent impurities from entering), seal gas, liquid discharge exhaust valve (discharge at low place and exhaust at high place) and return pipeline (return liquid inlet phase) are required.

Air separation equipment is an equipment that takes air as raw material, turns air into liquid through compression circulation and deep freezing, and then gradually separates from liquid air through distillation to produce inert gases such as oxygen, nitrogen and argon. There are many forms and types of air separation equipment produced in China.