Custom Rubber Door Seals for Freeze Dryers
Rubber Seals for the Doors of Commercial or Personal Freeze Dryers
Manufactured on site with most extrusions in stock, we supply your gasket / o-rings / rubber seals for your freeze dryers fast! We know your products are critical – call us today!
We serve all industries using freeze dryers: Pharmaceuticals & Biotechnology, Food & Beverage, Cosmetics & Personal Care, Scientific Research and more. We supply door seals for your freeze dryers.
Standard and Custom Spliced Seals for Freeze Dryer Doors
Door seals used in freeze dryers must withstand moisture, low temperatures, and often exposure to oils, odors and aggressive chemicals. Because of these harsh conditions, the materials chosen for freeze dryer door seals are highly specialized. Royal Seals supplies multiple styles of door seals for commercial freeze dryers.
Common Freeze Dryer Door Seal Materials
Silicone Rubber (VMQ)
Down to -60°C (-76°F)
Excellent heat resistance, flexible, steam resistant (limited)
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Match the chamber door flange profile (circular, rectangular, depending on model)
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Compress slightly (~20–40 %) to form airtight vacuum seal
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Stay elastic during cold cycling and vacuum pulls
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Resist aging from frequent use over years
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Be in a closed-cell or solid form depending on design
EPDM (Ethylene Propylene Diene Monomer)
Down to -46°C(–50°F)
Excellent resistance to steam and water, low cost
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Closed-cell gasket strips or custom die-cut profiles sized to fit the door flange.
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Compressed 20–40% in service to maintain a vacuum seal.
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Hardness usually in the 60–70 Shore A range for best balance of seal compression and resilience.
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Often available in thicknesses from 1/16″ up to 1/4″+, depending on gap and design.
Viton® (FKM)
Down to -29°C (-20°F)
Excellent chemical resistance, good with steam and pressure
Excellent resistance to oils, fuels, many solvents, and ores; good resistance for static seals in demanding industrial environments. (However, check compatibility if your freeze-dried product or cleaning agents include aggressive solvents.)
Neoprene
Down to -30°C (-20°F)
Sometimes used in older or industrial units, decent sealing but not as cold-tolerant as silicone
Closed-cell structure (for foam strips) helps resist water absorption/wicking.
Resistant to ozone, weather, oxidation, and moderate chemicals — useful for long service life.