Aerosol can, bag-on-valve

Aerosol refers to the preparation containing drugs, lotion or suspensions and suitable projectiles, which are jointly sealed in a pressure resistant container with a special Valve system. When used, the contents are sprayed as mist with the help of the pressure of the projectiles, and used for lung inhalation or directly sprayed to the mucous membrane of the cavity, skin and space for disinfection. It is widely used in medicine and daily chemical industry, especially in the daily chemical industry, such as sunscreen spray, moisturizing spray, toner spray and other products emerge in endlessly.

Aerosol is a pressure packaging product, with most of its functional ingredients being organic solvents and most of its propellants being flammable gases. Therefore, Aerosol products are also flammable and explosive dangerous goods, and the mixing of raw materials with propellants can cause secondary pollution of the raw materials; When the ambient temperature increases, the pressure inside the Aerosol will also sharply increase, exceeding the temperature limit may cause an explosion due to excessive pressure. Therefore, improving the purity of raw materials, improving the safety performance of Aerosol, and ensuring stable pressure inside the tank are all crucial. Therefore, the valve of Aerosol was improved and a binary spray bag valve was developed.

Bag-On-Valve includes a valve seat, a hollow valve body, a valve stem, an inner sealing ring, a spring, and a sealing bag. The valve body is fixedly arranged inside the valve seat, and the valve stem runs through the valve body. The inner sealing ring is pressed between the top of the valve body and the inner wall of the valve seat, and the inner sealing ring is sleeved at one end of the valve stem to form a sliding seal with the valve stem. One end of the valve stem is also equipped with a spraying chamber, and the spring is pressed between the other end of the valve stem and the inner wall of the valve body, The valve stem is equipped with a spraying channel for connecting the valve stem spraying cavity and the valve body. The spraying channel includes a limiting hole and a spraying gap. The limiting hole is located in the middle of the valve stem, one end of the limiting hole is connected to the spraying cavity of the valve stem, and the other end of the limiting hole is connected to the outside of the valve stem. The spraying gap is jointly enclosed by the inner wall of the valve body and the outer wall of the valve stem. The valve stem is equipped with a circular flange below the limiting hole, And the top end of the annular flange can contact and seal with the bottom end of the inner sealing ring.

Bag-On-Valve controls the gas release by controlling the connection between the flow limiting hole of the valve stem and the spray gap. The operation is simple, and the raw material is wrapped in a sealed bag to separate the raw material from the propellant, preventing secondary pollution of the raw material. At the same time, the propellant uses nitrogen or compressed air, reducing the possibility of flammability and explosion, and greatly improving the safety performance of the aerosol. The use of this bag valve technology has the following advantages:
Compressed air is only used to propel and disperse the filled material.
2. Materials are packed in sealed bags in metal cans (sterile environment).
3. Due to its ability to isolate from propellants, the formula is easier and more environmentally friendly.
When in use, it can be sprayed at any angle (even upside down).
5. Materials can be completely used up (to avoid waste).