Application of Liquid Pumps in Disinfection Spraying Systems
Background Introduction
It has been over five years since the end of 2019 that the pandemic has been part of our lives. Those years were spent with the COVID-19 virus, accompanied by constant tension and anxiety. People have increasingly realized that this is a prolonged and severe crisis. During these years, pandemic prevention became an indispensable part of daily life, a “required course” for everyone. Personal protection has received unprecedented attention. In addition to wearing masks and frequent handwashing, disinfection has also become a topic of public concern. Research has shown that disinfection is an effective means to eliminate pathogens and cut off the transmission of the pandemic, making it a critical measure in pandemic control.
Significance of Disinfection
- Preventive Role
Just as prevention is better than cure, early intervention against the outbreak can effectively reduce the risk of transmission and the likelihood of disease occurrence. Preventing the spread of the pandemic is a shared public desire, and prevention plays a crucial role in pandemic control. - Cutting Transmission Routes
Using physical, chemical, and biological methods to eliminate pathogens from the environment cuts off transmission routes at the source, creating a low-risk public environment and thereby curbing further spread and expansion of the pandemic. - Epidemic Prevention and Disinfection
In the current pandemic environment, healthcare professionals can use their expertise to disinfect and sterilize the environment. By conducting disinfection in a professional manner at scheduled times and locations, they ensure public health and safety.
Selection of Disinfectants
- Alcohol
Alcohol possesses certain lipid solubility. According to the principle of “like dissolves like,” it can disrupt the lipid envelope composed of a phospholipid bilayer. Simultaneously, upon contact with the glycoproteins on the viral envelope, it dehydrates and denatures the proteins, thereby inactivating the virus. (A concentration of 75% is optimal, but fire safety must be ensured.) - Chlorine-Based Disinfectants
All chlorine-based disinfectants share a common trait—they generate hypochlorous acid (HClO) upon dissolving in water, which exhibits microbicidal activity. Hypochlorous acid has a small molecular weight and strong oxidizing properties. Upon contact with the COVID-19 virus, it first oxidizes and denatures the envelope proteins while damaging the protein shell, causing loss of protein cross-linking. This further disrupts the enzymatic system and genetic material, rendering the virus inactive.
Our Company’s Liquid Pump Materials
Our liquid pumps primarily use EPDM rubber (ethylene propylene diene monomer), which is a copolymer of ethylene, propylene, and a small amount of non-conjugated diene hydrocarbons. It is a type of ethylene propylene rubber. Its most notable characteristics are superior resistance to oxidation, ozone, and corrosion. Therefore, our liquid pumps offer excellent corrosion resistance and can be selected with confidence. Additionally, we can customize liquid pumps using FKM fluorocarbon rubber. Compared to EPDM, FKM withstands temperatures over 30°C higher, offers better high-temperature performance, and has broader chemical compatibility, allowing for customization based on specific needs.
Besides considering the chemical compatibility of the elastomer with disinfectants, the chemical compatibility of the liquid pump head’s engineering plastic material with disinfectants must also be considered. For common disinfectants, PPS exhibits superior chemical compatibility compared to nylon. Nylon is generally recommended only for short-term exposure to room temperature and low concentrations. For scenarios requiring long-term stable and reliable use, PPS material is the better choice for engineering plastic pump heads.
The table below shows the chemical compatibility of common disinfectants with rubber and plastic materials:
| Disinfectant | Rubber Material Option | Plastic Material |
|---|---|---|
| Ethanol | EPDM | PPS |
| Bleach (Sodium Hypochlorite) | EPDM/FKM | PPS |
| Hypochlorous Acid | FKM | PPS |
| Chloroform | FKM | PPS |
| Hydrogen Peroxide | FKM | PPS |
Application Principle
When disinfection is required, our pump can be activated to transport stored disinfectant through pipes. The disinfectant is then sprayed onto the target area via nozzles, completing the disinfection process.
Our Product Advantages
Our liquid pumps mainly belong to the S series, with three currently available products: S15, S23, and S36.
Miniature Liquid Pump S15
Description: Miniature liquid diaphragm pump, brushless motor, suitable for both gas and liquid, rated operating voltage 5V, no-load liquid flow rate: 20 mL/min.
Advantages: Wide voltage range (3.2–6V), compact size, self-priming capability, stable flow, compatibility with complex media, remote control.
Miniature Liquid Pump S23
Description: Miniature liquid diaphragm pump, optional FKM/EPDM rubber, optional PA6 and PPS pump heads, excellent chemical resistance, brushless motor, suitable for both gas and liquid, rated operating voltage 12V, no-load liquid flow rate: approximately 0.4 L/min.
Advantages: Stable flow, compact size, low noise, compatibility with complex media, remote control.
Miniature Liquid Pump S36 Series—S36L, S36M, S36S
Description: Miniature liquid diaphragm pump, brushless motor, suitable for both gas and liquid, rated operating voltage 24V, no-load liquid flow rate range: 1.3–3 L/min (S36L: 3 L/min, S36M: 2 L/min, S36S: 1.3 L/min).
Advantages: Stable flow, adjustable flow rate, high head, compatibility with complex media, remote control.
