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Product ID：hepa-diffuser-liquid-sealCleanroom EquipmentHEPA Diffuser Box
Cleanroom Equipment
Liquid-seal HEPA Diffuser Box
Product Overview
A liquid-seal HEPA diffuser box changes the seal between the housing and the filter from a compressed gasket to a liquid channel: a groove runs around the grid or housing frame, sealing gel fills the groove, and the filter frame sits down into it, forming a continuous seamless seal.
Gasket sealing depends on clamping force, and over time local leakage appears as the gasket ages, the clamping bar deforms or the installation sits slightly out of plane. A liquid seal does not have that failure mode — the gel fills every gap by itself and does not harden or shrink with age.
Features & Specifications
►**Sealing method**: liquid channel seal, continuous and seamless
►**Filtration efficiency**: ≥99.99% (particles ≥0.3μm)
►**Initial resistance**: ≤230Pa
►**Duct connection**: top entry or side entry
►**Filter replacement**: bottom-loaded, changed from within the room
►**Applications**: pharmaceutical, biotech and high-classification zones with strict leakage requirements
Detailed Description
When the extra cost is justified
A liquid seal costs more than a gasket and needs a more complex grid system, so it does not suit every situation. The deciding factor is **whether leak testing is required**. In pharmaceutical, biotech and sterile preparation work, filters are DOP/PAO scan-tested after installation and re-tested periodically. Frame leakage at re-test is a common finding with gasket seals, and re-seating and re-clamping costs both labour and downtime. With a liquid seal that test almost never fails. For general electronics facilities with no periodic leak-test requirement, a gasket seal gives better value.Maintenance means watching the gel level
The single maintenance point of a liquid seal is the level of gel in the channel. Over long service the level falls slowly through evaporation and through gel carried out when filters are changed, and too low a level breaks the continuous seal. Checking the level periodically and topping it up is the only routine maintenance this system needs. In exchange it does not require the periodic checks of clamp torque and gasket ageing that a gasket seal does. When changing a filter, take care not to carry too much gel out of the channel: lift vertically rather than tilting and dragging.Selection References
Before ordering, verify the efficiency grade, media type, and whether the operating environment fits your requirements.
