How to choose between FFU tank seal and gasket seal? Interface, maintenance and leak detection conditions
The basic difference between the two sealing methods
There are usually two common ways to install and seal FFU filters: liquid tank seal and gasket seal. The liquid tank seal is inserted into the sealing liquid in the liquid tank through the knife edge on the filter frame to form a seal. Gasket sealing uses a sealing strip or gasket to fill the contact surface after being compressed to form a seal.
Both are used to prevent unfiltered air from bypassing the filter. Each of them has applicable scenarios and installation requirements. Which method to choose needs to be combined with the project interface, maintenance method and leak detection requirements.
Aili Industry has complete production capabilities in FFU complete machines and high-efficiency filters, and can provide both liquid tank seal and gasket seal configurations. For the basic structure of the FFU machine, please refer toAili Industrial FFU fan filter unit。
How to check interface and structure
Liquid tank sealing requires a liquid tank on the FFU box or installation frame, and a corresponding knife edge on the filter frame. The depth of the knife edge inserted into the liquid tank and the liquid level of the liquid tank affect the sealing effect. Liquid tank seals have certain requirements for installation accuracy and structural coordination.
Gasket sealing requires a sealing surface on the filter frame or box, and the sealing strip is compressed by a compression mechanism. The compression amount and uniformity of the sealing strip affect the sealing effect. Gasket sealing has certain requirements on the flatness of the mounting surface and the pressing mechanism.
When selecting the sealing method, you should confirm whether the FFU box and filter interface match. If the project already has an installation frame or ceiling structure, you need to confirm its applicable sealing method.
How maintenance conditions compare
Liquid tank seal When replacing the filter, the sealing fluid needs to be disposed. After the old filter is removed, the fluid tank may need to be cleaned, replenished, or replaced with sealing fluid. When installing a new filter, make sure the knife edge is inserted in place. The maintenance operation of the liquid tank seal is relatively complicated, but the sealing liquid can provide better sealing continuity.
Gasket Seal When replacing the filter, it is necessary to check the condition of the sealing strip. If the sealing strip is aged or deformed, it needs to be replaced. When installing a new filter, it needs to be pressed evenly. The maintenance operation of the gasket seal is relatively simple, but the condition of the sealing strip needs to be checked regularly.
The choice of maintenance method depends on the project maintenance conditions and personnel operating habits.
How to compare leak detection conditions
Both sealing methods require leak detection after installation. Leak detection methods are similar, usually using scanning methods to detect particle leakage near the sealing interface.
Leak detection of the liquid tank seal requires confirmation of the insertion depth of the knife edge and the state of the sealing fluid. If the liquid level in the liquid tank is insufficient or the knife edge is not inserted in place, leakage may occur. Leak detection of gasket seals requires confirming that the sealing strip is compressed evenly and that there are no loose parts.
Leak detection records should correspond to the filter number and installation location. Regardless of the sealing method, if the filter passes the factory leak test, it does not mean that the seal is intact after installation.
How to judge applicable scenarios
Liquid tank seals are suitable for scenarios where seal reliability is high, maintenance frequency is relatively low, and the installation structure allows for liquid tank design. It is common in some pharmaceutical, semiconductor and high-efficiency filter applications.
Gasket sealing is suitable for scenarios with compact structure, easy maintenance, and flat installation surface. It is widely used in FFU and clean room applications.
The selection should be based on the project interface, maintenance method, leak detection requirements and operating environment. If the project has special requirements, you can confirm the applicable sealing method with the FFU manufacturer.
How to confirm materials and compatibility
The sealant and sealing strip materials need to be compatible with the environment in which they are used. If there are chemical media or cleaning agents in the environment, confirm whether the sealing material is corrosion-resistant. If the ambient humidity is high or the temperature changes greatly, the stability of the sealing material should be confirmed.
For pharmaceutical and food items, sealing materials should also consider cleaning and disinfection requirements. For specific material selection, please refer toStainless steel FFU understands the configuration ideas in different environments.
Issues that should be confirmed in advance during project communication
In the FFU sealing method selection stage, it is recommended to confirm the following with the manufacturer: FFU box and filter interface; liquid tank or gasket structure; sealing fluid or sealing strip material; maintenance methods and replacement steps; leak detection methods and judgment standards; compatibility with the use environment; spare parts supply; and whether prototype confirmation is needed.
If you are choosing the FFU sealing method, you can visitAili Industrial FFU fan filter unit to learn about the complete machine configuration, you can also refer toTank seal high efficiency filter andLiquid tank seal ULPA ultra-high efficiency filter Learn about liquid tank seal filter products, or contact Aili Industrial for seal selection support.
in conclusion
Tank seals and gasket seals need to be selected based on the project interface, structure and maintenance requirements. Both methods rely on proper installation, and site integrity cannot be judged solely by the seal name. Interface verification, maintenance conditions, leak detection verification and material compatibility are key considerations in selection.
Aili Industry has complete production capabilities in FFU complete machines and high-efficiency filters, and can provide both liquid tank seal and gasket seal configurations. If you need to know more about FFU seal selection, you can visitAili Industrial FFU fan filter unit , you are also welcome to contact Aili Industrial for project support.
