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Cleanroom Equipment Spare Parts
Automatic Door Drop Seal
A slim mechanical door-bottom assembly that retracts its silicone blade while the door moves and lowers it evenly against the floor when a single end plunger meets the jamb.
- Single-Side Plunger Actuation
- Parallel-Drop Silicone Blade
- Slim Aluminum Carrier
- No Electrical Connection
Product Introduction
This automatic door drop seal is a narrow mortised assembly for the bottom edge of cleanroom swing doors. A jamb-contacting plunger transfers closing movement through a spring-loaded linkage inside the extruded aluminum carrier. The linkage lowers one continuous silicone blade after the door reaches the frame and returns it into the carrier as soon as the door opens. The self-levelling movement helps the blade follow modest floor variation without dragging across the walking surface during the swing cycle.
Key Features
A spring-return pushrod and pivot linkage retract the blade promptly to reduce scraping, rolling resistance and premature elastomer wear.
The continuous dark silicone blade descends in a parallel action to close the under-door air path across the full leaf width.
The slim natural-aluminum carrier can be recessed into the door bottom and serviced from the actuator end without a floor-mounted track.
Customer Product Concerns
Reliable under-door sealing requires enough blade travel for the finished gap, accurate plunger contact and free retraction before the door begins to swing.
A fixed sweep drags across resin or vinyl flooring, increasing door force and shedding worn seal material near a controlled area.The spring-return linkage lifts the silicone blade clear of the floor immediately after the plunger releases.
A floor that is slightly out of level can leave one end of a rigid door-bottom gasket open.The parallel-drop, self-levelling carrier allows the continuous blade to seat across the opening while maintaining a single uninterrupted seal line.
An over-extended actuator can force the mechanism beyond its useful travel and shorten component life.The accessible end plunger provides controlled stroke adjustment so the blade reaches the floor near the final closed position.
A bulky surface-mounted device can conflict with cleanroom door skins, kick plates or flush architectural details.The narrow extruded carrier fits a prepared mortise in the door bottom, leaving only the end actuator and descending seal function exposed.
Typical Applications
Cleanroom personnel swing doorsAirlock and gowning-room doorsLaboratory corridor doorsControlled production-suite entrances
Technical Parameters
The following ranges describe common slim mortised automatic drop seals with an aluminum carrier, single-end mechanical actuator and continuous silicone sealing blade.
| Core Material | EN AW-6063 extruded aluminum carrier with stainless-steel spring linkage and dark silicone sealing blade |
|---|---|
| Panel Thickness | 14-20 mm nominal carrier width |
| Effective Width | 30-40 mm nominal carrier height |
| Maximum Length | Up to 1235 mm standard assembly length; longer versions available by selection |
| Steel Facing Thickness | 0.8-1.5 mm nominal stainless end-plate and linkage thickness |
| Core Density | Approximately 2700 kg/m³ for the aluminum carrier |
| Thermal Conductivity | Approximately 190-201 W/(m·K) for representative 6063 aluminum |
| Surface Finish | Mill-finish natural-silver aluminum with silver end plates and dark-gray silicone blade |
| Joint Type | Single-end plunger-actuated spring linkage with parallel-drop self-levelling seal carrier |
| Customization | Available based on the intended application and operating environment. |
Available Options
Length matched to the prepared door leafGray or black silicone sealing bladeLeft- or right-hand actuator orientationMortised or face-mounted carrier configuration
Planning a Automatic Door Drop Seal specification?
Send us your dimensions, installation conditions, performance targets and required surface finish.
