Inflatable Door Seals For Tablet Coaters

Bombay Rubber & Carbon Works

Bombay Rubber & Carbon Works has developed and supplied inflatable door seals to tablet coater users and manufacturers worldwide, with full FDA certification . A specialised sealing solution for tablet coating equipment is essential to efficient, effective operation in the pharmaceutical industry, and our inflatable seals are built specifically for this demanding duty .

Reliability in maintaining a tight seal on door openings is critical to coating process efficiency and productivity . Keeping these seals in good condition and properly maintained has a direct impact on the overall performance and quality of the coating process .

Bombay Rubber & Carbon Works' inflatable seals are used to seal both the cleaning/inspection access doors and the drum entry openings on tablet coating equipment, with a range of designs available to match different coater models .

Parameter Typical Value
Base Elastomer NBR/Buna-N (standard); FDA-compliant silicone available
Certification Supplied with FDA compliance documentation
Sealing Points Cleaning/inspection access doors and drum entry openings
Construction Handbuilt -or fully moulded, with fabric reinforcement option for larger openings
Actuation Medium Compressed air, pressure-controlled
Working Pressure Low-pressure door-sealing duty, suited to coater access points
Sealing Gap Accommodation 2 mm – 10 mm typical
Expansion Modes Axial, internal radial, external radial
Mounting Retaining groove or channel on coater door/drum frame
Format Continuous endless loop, sized to door or drum opening
Customisation Built to customer sketch/drawing, coater model, and special-feature requirements

Values above are typical for standard tablet coater door-sealing duty; confirm exact figures against the compound-specific technical data sheet for your coater model .

Why NBR/Buna-N and FDA-compliant silicone?

Tablet coaters run repeated inflate/deflate cycles as access doors open and close for loading, inspection, and cleaning between batches . The sealing material has to stand up to this repeated cycling while also meeting the hygiene and material-purity standards expected in pharmaceutical manufacturing .

Key material properties

  • Reliable cycling performance: standard NBR/Buna-N construction holds its sealing profile through frequent door-opening cycles without rapid wear .
  • FDA compliance option: where direct or indirect product contact considerations call for it, an FDA-compliant silicone construction is available with full supporting certification .
  • Consistent sealing force: good compression-set resistance means the seal keeps returning to its working profile batch after batch, which is what actually protects coating process consistency and product quality over time .
  • Design flexibility: seals are built to match specific coater geometries, with different designs available for cleaning/inspection access doors versus the larger drum entry opening .
  • Maintenance-friendly construction: seals are built for straightforward inspection and replacement, since seal condition has a direct, documented impact on coating process performance .

Bombay Rubber & Carbon Works provides technical guidance on seal design and material selection so each tablet coater seal is matched to the specific coater model, door type, and operating cycle .

Inflatable door seals for tablet coaters are specified across pharmaceutical and nutraceutical manufacturing operations :

  • Pharmaceutical tablet manufacturing: film coating, sugar coating, and enteric coating pan equipment
  • Nutraceutical & dietary supplement manufacturing: coated tablet and capsule production
  • Contract manufacturing organisations (CMOs): multi-product coating lines requiring reliable, repeatable door sealing
  • Pharmaceutical equipment OEMs: coater manufacturers specifying sealing components for new equipment builds
  • Pharmaceutical maintenance & spares supply: replacement seals for existing installed tablet coating equipment