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What are the designs of the anti-leakage mechanism of the cosmetic pump head

The anti-leakage mechanism of the cosmetic pump head is to ensure that the product will not leak during use and storage, and to maintain the freshness and quality of the product.
Double seal design:
Structural design: High-end cosmetic pumps usually adopt a double-seal design, that is, a two-layer sealing structure is set up at the key connection parts of the pump head to improve leakage blocking capabilities. This can include a dual combination of spring seals and O-ring seals.
Multi-layer protection: The multi-layer sealing mechanism ensures that even if one sealing part fails, the other sealing part can still effectively prevent liquid leakage, improving product safety and reliability.
Spring seal design:
Sealing mechanism: The spring serves as a sealing element, and its sealing mechanism uses the elasticity of the spring to ensure that when the pump head is not pressed, the liquid storage chamber is effectively isolated from the outside world to prevent liquid leakage.
Spring material: Choose materials with good elasticity and corrosion resistance, such as stainless steel springs, to ensure that they do not lose elasticity and sealing properties after long-term use.
O-ring design:
Sealing mechanism: O-rings are usually used in connecting parts to provide additional sealing performance. The O-ring seal forms an effective sealing barrier by filling the gap at the connection, preventing air and external contaminants from entering the pump head.
Sealing ring material: Choose chemical-resistant and high-pressure-resistant rubber materials, such as fluororubber, to ensure that the sealing ring can maintain excellent sealing performance under different conditions.
Anti-suckback design:
Anti-suckback structure: In order to prevent liquid from being sucked back into the liquid storage chamber after the pump head is pressed, the anti-suckback structure needs to be considered in the design. This may include valves or other back-back prevention devices in liquid lines.
Prevent contamination: This design is designed to avoid backflow of liquid after pump head operation, prevent contamination and ensure product hygiene and purity.
Air tightness test:
Testing steps: During the production stage, the pump head needs to undergo an air tightness test to detect the air tightness of the pump head to ensure that no gas leakage occurs under normal use conditions.
Test standards: Air tightness testing can use different standards and methods, such as pressure testing, to verify the leak-proof performance of the pump head.
Liquid tightness test:
Test steps: Liquid tightness test is used to verify the sealing performance of the pump head in the liquid state to prevent liquid leakage or contamination.
Test standards: Liquid tightness testing can also use different standards and methods, such as liquid discharge testing, to evaluate the performance of the pump head under different usage scenarios.