EnglishCurrent
德语
阿拉伯语
法语
印尼语
日语
韩语
马来语
葡萄牙语
俄语
西班牙语
泰语
土耳其语
越南语
Cleanroom Equipment Spare Parts
FFU Gel Seal
A refillable fluid-gel trough that forms a conformable low-bypass seal around an FFU HEPA filter knife-edge interface.
- Continuous Fluid-Gel Barrier
- Knife-Edge Interface
- Refillable Aluminum Trough
- Conformable Low-Bypass Seal
Product Introduction
The FFU gel seal uses a continuous channel of stable silicone gel to receive the projecting knife edge of a mating HEPA filter or housing. As the knife edge enters the gel, the fluid conforms around minor dimensional variation without the compression load required by a foam gasket. An aluminum trough retains the gel around the full perimeter, with sealed corners and an optional fill port for controlled service. Trough dimensions, gel depth, viscosity and knife-edge immersion must match the installed filter system.
Key Features
A rigid aluminum trough controls gel depth and prevents migration from the sealing path.
Mitered or welded corner construction maintains channel continuity at perimeter turns.
A capped fill port supports controlled topping-up or replacement of compatible gel.
Customer Product Concerns
A fluid seal only performs reliably when the trough remains continuous and the mating knife edge reaches the correct gel depth.
Insufficient gel depth leaves sections of the knife edge unsealed.Trough volume and fill level are matched to the knife-edge height and intended immersion.
Corner discontinuities become bypass paths around an otherwise sealed perimeter.Sealed corner joints maintain one uninterrupted gel channel around the frame.
Incompatible gel hardens, flows or contaminates the mating surface.Gel chemistry and consistency are selected for the operating temperature and filter interface materials.
Overfilling causes gel displacement during filter installation.A defined trough profile and controlled refill quantity keep the gel below its retention lips.
Typical Applications
Gel-seal FFU HEPA interfacesCleanroom terminal filter housingsPharmaceutical ceiling filter modulesLow-bypass filter replacement systems
Technical Parameters
Typical construction ranges for FFU fluid-gel seal troughs are shown below.
| Core Material | Non-curing silicone sealing gel retained in an aluminum perimeter trough |
|---|---|
| Panel Thickness | 15-40 mm nominal trough depth |
| Effective Width | 300-610 mm nominal frame width |
| Maximum Length | Up to 1220 mm nominal frame length |
| Steel Facing Thickness | 0.8-1.5 mm optional stainless-steel cover or retaining component |
| Core Density | Approximately 950-1050 kg/m³ for the silicone gel |
| Thermal Conductivity | Approximately 0.15-0.25 W/(m·K) for silicone sealing gel |
| Surface Finish | Natural silver aluminum trough with translucent blue or clear silicone gel |
| Joint Type | Continuous U-channel trough with sealed mitered corners and optional capped fill port |
| Customization | Available based on the intended application and operating environment. |
Available Options
Blue or clear compatible gelCustom trough dimensionsCapped fill and drain portsMatched knife-edge immersion depth
Planning a FFU Gel Seal specification?
Send us your dimensions, installation conditions, performance targets and required surface finish.
