Brief analysis of three important indicators of aerosol valves

With the development of the economy, the growth of consumption level and the improvement of people's concept of environmental protection, the improvement of national safety regulations and environmental protection regulations, the market has put forward new requirements for the aerosol industry. The aerosol should not only release the content, but also Moreover, it is necessary to ensure safe and efficient use after a period of storage or use. These requirements are driving changes in the structure of aerosol products. With the continuous increase of the types of aerosol valves, the applicable fields have been widely expanded, but there are three important indicators in the process of adjusting the product structure of aerosol valves that cannot be ignored. The following aerosol filling machine manufacturers give you Briefly introduce these three important indicators.

1. The pressure resistance of the aerosol valve

The pressure of the aerosol is mainly derived from the pressure of the propellant in the tank. The pressure here is mainly from the pressure of the propellant in the tank. Generally, the pressure is about 0.5MPa at 23°C, but the pressure in the tank will increase as the temperature increases, such as LPG The pressure of the propellant such as DME and DME varies greatly with the temperature. The fixed cover is the most important part of the aerosol valve to withstand the pressure. In the industry, it is usually stamped with 0.27mm thick tinplate or 0.42mm thick aluminum, and generally can withstand about 2.0MPa. For high-pressure products such as fire extinguishers, thicker materials need to be used to increase their compression resistance. Tinplate with a thickness of 0.42mm can be used as the sealing cup material.

2. The tightness of the aerosol valve

The sealing ring is assembled in the valve body, called the inner gasket, which forms a complex sealing relationship between the valve body, fixed cover, and valve core parts. Unlike the outer gasket, this is a dynamic sealing point and is in direct contact with the solvent in the tank. It is the most common and main sealing point for aerosol valve leakage, so the sealing ring is the top priority in the production of aerosol valves.

3. Corrosion resistance of aerosol valve

The inner surface of the aerosol valve is in direct contact with the contents of the aerosol. If the product formula is not well controlled in terms of corrosion resistance, otherwise there is a possibility of corrosion of the components of the aerosol valve. For example, in water-based formulations, if the fixed cover is produced from tinplate without surface treatment, it is easy to develop corrosion spots, by perforation leakage. In this case, you should choose tinplate or aluminum fixed cover with internal coating. It is also worth mentioning that there are very few formulas that will cause corrosion or dissolution of the valve body, mainly because the product solution contains harmful substances to the valve body. Components of plastic decomposition At present, the materials used to produce valve bodies in the industry are usually polyethylene (PE), polyoxymethylene (P0M) and nylon (PA). Therefore, when selecting an aerosol valve, attention should also be paid to the material used to produce the valve body Whether it is compatible with the product formula.