A cleanroom door seals in two places, and this page treats those two places as one system. At the frame, the aluminium door frame and the aluminium leaf frame carry a frame sealing strip that is stated to seal strongly while reducing noise and insulating sound. At the floor, the double-spring rising sweep strip settles smoothly, runs quietly, and seals well, giving the closed door its airtightness at the line where the leaf meets the floor finish. Either seal alone leaves the door half sealed, so the frame seal and the floor seal should be specified, checked, and maintained together.
The frame is aluminium in both parts: the fixed door frame and the moving leaf frame. That shared material keeps the frame line consistent and gives the sealing strip a stable seat on both sides of the closing line. The steel panel door description adds the rounded-corner frame character, while the full steel door description adds the one-piece formed shell, but the sealing system itself is the same pairing of frame strip and sweep strip across both families. A schedule that names the family but not the seals leaves the most failure-prone part of the door unspecified.
Sealing performance depends on the leaf staying aligned, which is why hinges and stiffeners belong in a sealing discussion. Hinges stated to produce no metal powder over long use while remaining quiet and wear resistant keep the leaf hanging true on its seals, and internal stiffeners keep the leaf flat so the seal line does not gap at a corner. The closer, covered on the locks and closers page, completes the set: a closer that drives the leaf firmly but without slamming it lets both seals meet their seats every time the door closes. When a door is reported as leaking air or sound, the check order should be closer, hinges, leaf flatness, frame strip, then sweep strip, because the seals are usually the symptom rather than the first cause.
In the inquiry, list the frame and sealing requirement per opening alongside the leaf arrangement and the floor finish, because the sweep strip meets the floor and the floor finish determines how the strip seats. Confirm the strip and seal arrangement for any non-standard floor build-up, and keep the frame seal, the sweep strip, the hinges, and the closer on one schedule so they are confirmed as a set.
- Frame: aluminium door frame and aluminium leaf frame.
- Frame seal: sealing strip, strong sealing, noise reduction, sound insulation.
- Floor seal: double-spring rising sweep strip, smooth settling, quiet, good airtightness.
- Alignment: quiet wear-resistant hinges with no metal powder over long use, plus internal stiffeners.
- Closer: confirm with the seals as a set; see the locks and closers page.
- Inquiry line: frame and sealing requirement per opening, with floor finish.
Sealing system parts
| Part | Stated fact |
|---|---|
| Door frame | Aluminium |
| Leaf frame | Aluminium |
| Frame sealing strip | Strong sealing, noise reduction, sound insulation |
| Sweep strip | Double-spring rising, smooth, quiet, good airtightness |
| Hinges | No metal powder over long use, quiet, wear resistant |
How to read the specifications on this page
Dimensions and construction details on this page follow the Lairun product description for the component family shown. Door opening sizes quoted on this site are brochure dimensions: they describe the opening sizes listed in the product brochure, and any non-standard size should be confirmed in the inquiry. Aluminium profile codes are listed by code only; no profile dimension is stated where the product description does not give one. Items that the product description does not specify are marked for inquiry confirmation rather than described as available options, so buyers are not led to assume a mechanism, a load figure, or a material variant that has not been evidenced.
What to put in your inquiry
Send the opening sizes you need, the leaf arrangement, the surface finish you prefer, and the ceiling layout where the components will be installed. State the quantities per size, the site conditions, and the delivery location so the component list can be checked line by line. Where this page lists an item as subject to confirmation, include that item explicitly in your message so it is answered before any order is placed. Please confirm the minimum order quantity and the lead time in your inquiry, because this site does not publish those figures. Certificates are available upon request; please ask for the documents you need and state which project they are for.