1. Application of liquid nitrogen in food quick-freezing Among the numerous collection methods, the frozen collection method is the most widely used, and the results are also very obvious. Liquid nitrogen quick-freezing, one of the methods of freezing and storage, has long been accepted by fo

Cylinders filled with various gases have a bottle valve on the mouth of the bottle to control the gas in and out. Wear a cap on this bottle valve to ensure that the bottle valve is not damaged by machinery and ensure safety. It is an important accessory of the gas cylinder, which is called a safety

Why can't the oxygen cylinder, especially the bottle mouth, be contaminated or contacted with oily substances? This problem is not completely familiar to managers engaged in use and storage. Oils and fats, especially those containing unsaturated fatty acids, are easily vaporized and exothermic. The

1. Definition Industrial oxygen: Refers to industrial use of oxygen. Industrial oxygen generally only requires oxygen purity, and no special requirements for other sanitary conditions. At the same time, it also contains excessive carbon monoxide, methane and other harmful gases, as