Rotary shaft seals for Pharmaceutical.
Pharmaceutical sealing means the seal is part of the GMP-controlled manufacturing system. The unit isn't 'a seal' — it's a documented component with material certificates, surface-finish records, and lot traceability. CinchSeal builds to that standard and ships the paperwork in the box.
01The challenge
Why sealing this service is hard.
These are the failure modes our application engineers have catalogued from twenty-five years of pharmaceutical installations. Most are visible only after a seal has been pulled.
- 01
USP Class VI biocompatibility on every elastomer
FDA-grade is not enough for direct API contact. We spec USP Class VI elastomers verified by lot, with biocompatibility testing on file at our Cherry Hill QA office.
- 02
Sterile air purge for cleanroom service
A dirty air purge is a worse contamination source than no purge at all. We supply the 7800-USP with an autoclavable 0.2 µm sterile filter on the air inlet — replaced per validated SOP.
- 03
Documentation tied to each unit's serial number
Every pharma seal ships with a unit-specific COA: material lot numbers, surface-finish measurement, hydrostatic test record, and a 21 CFR Part 11 sign-off ready to drop into the customer's batch record.
- 04
Cross-contamination and product changeover
Multi-product cleanroom suites need a seal that swabs cleanly between campaigns. Our crevice-free, electropolished body geometry passes a riboflavin test on first cycle.
02Recommended series
What we ship for pharmaceutical.
7800 Series CEMA
All-stainless, washdown-rated seal for food, dairy, and pharma equipment.
View specsSeriesCHOPChopper Seal
Engineered for the 3,600 RPM chopper, not adapted from a slow-speed seal.
View specsSeriesAST60AST60
Drop-in cartridge seal for ANSI B73.1 chemical process pumps.
View specs03Common equipment
Where we typically install in pharmaceutical plants.
04Compliance & materials
Documentation we ship with the seal.
- USP Class VI elastomer compounds with current biocompatibility certificates
- 21 CFR Part 11 documentation package available per unit
- Electropolished 316L wetted parts to Ra ≤ 16 µin on request
- ASME BPE-conformant weld preps and inspection records
05Engineering FAQ
What plant engineers ask before specifying.
Pharmaceutical · sized in 24 hours
Get a recommendation for your pharmaceutical application.
Send equipment type, shaft size, and what's flowing through. A CinchSeal application engineer with pharmaceutical experience responds with a sized series, materials, and pricing.