Inflatable door seals for industrial autoclaves, pressure vessels and steam sterilizers. Built to your groove, matched to any OEM profile, made in the USA.
An autoclave door has to do two things that fight each other: move freely so the chamber can be loaded, then hold pressure and heat across a gap that is never perfectly even. A compression gasket is squeezed by the door itself, so it drags on every opening, wears unevenly, and needs a heavy, precisely aligned closure to seal at all. An inflatable seal separates the two jobs. It sits retracted in its groove while the door travels, then inflates to fill the gap and press evenly against the door face, taking up misalignment, wear and thermal growth on every cycle.
Large chamber doors on the autoclaves and pressure vessels used across industry: composite curing for aerospace and composite molding, laminated safety glass, rubber vulcanizing, AAC concrete curing, wood treating and food-canning retorts. High-temperature silicone or EPDM to suit the process, usually fabric-reinforced to carry chamber pressure across a wide door gap through long cycles.
Hospital, laboratory and pharmaceutical sterilizers running 121–134°C saturated steam, cycle after cycle, with hydrogen peroxide vapor or EtO in the same suite. FDA-compliant, USP Class VI silicone or EPDM. Serves medical and pharma equipment builders and maintenance teams.
Every seal is engineered to the chamber it goes in. The ranges below are the envelope DRI builds to; the exact material, profile and working pressure are set from your door gap, chamber pressure and cycle.
| Industrial Autoclave / Pressure Vessel | Steam Sterilizer | |
|---|---|---|
| Service temperature | To +450°F (silicone); to +300°F (EPDM) | 121–134°C (250–273°F) saturated steam |
| Seal inflation pressure | 15–45 psi (1–3 bar); fabric-reinforced for higher chamber pressure | 15–30 psi (1–2 bar) typical |
| Material | High-temperature silicone; EPDM for steam and hot-water processes | FDA / USP Class VI silicone or EPDM; low extractables |
| Reinforcement | Kevlar, fiberglass or nylon fabric for pressure and dimensional control | Non-reinforced or light fabric, depending on door gap |
| Configuration | Endless loop with molded corners, or straight lengths with spliced ends | Endless loop, rectangular or round door |
| Media resistance | Heat, steam, resin bleed, release agents, process chemicals | Steam, hydrogen peroxide vapor, EtO, CIP/SIP chemicals |
Most autoclave seal orders are replacements for a seal that has hardened, cracked at a corner, or started leaking at the splice. The groove is already machined, so the new seal has to fit it. DRI works from any of three things:
See the seal profile library for the standard sections DRI starts from, and the pharmaceutical and food-grade seal range for sterilizer materials.
Most autoclave and sterilizer door seals operate at 15 to 45 psi (1 to 3 bar) of air, set a margin above the chamber pressure they hold back. Fabric-reinforced seals are used where the door gap is large or chamber pressure is high; the working pressure is specified as part of the design.
Silicone seals are rated for continuous service from –65°F to +450°F, which covers composite cure cycles, glass lamination and 134°C (273°F) saturated-steam sterilization. EPDM is used to +300°F where steam and hot-water resistance matters more than peak temperature.
A compression gasket is squeezed by the door itself, so it drags during door travel, wears unevenly and needs a heavy, precisely aligned closure to hold pressure. An inflatable seal sits retracted in its groove while the door moves, then inflates to fill the gap and press evenly on the door face, tolerating misalignment and wear.
Yes. Send the OEM part number, a cross-section sketch, or a sample of the existing seal. DRI matches the profile so it fits the existing groove, and can improve the compound, splice or reinforcement where the original is failing.
Medical and pharmaceutical sterilizer seals are made from FDA-compliant, USP Class VI silicone or EPDM formulated for repeated steam cycles and resistance to hydrogen peroxide vapor and ethylene oxide. Industrial autoclave seals use high-temperature silicone or EPDM to suit the process, typically fabric-reinforced.