For pharmaceutical duty, specify a chain conveyor in 304 or 316 stainless steel with FDA-grade UHMW or acetal link surfaces, IP65 minimum on the drive housing, and a tool-less quick-release take-up; 72 manufacturers and 171 product entries are currently catalogued under the pharmaceutical-conveyor filter on DirectIndustry [S1].
Chain conveyors — including tabletop, magnetic, mat-top and enclosed drag designs — sit alongside belt, screw and vacuum conveyors as one of four core conveying families offered for pharma packaging and processing lines [S2]. Selection for pharma is hygiene-and-cleanability-first, not throughput-first: a 316L frame, sanitary contact surfaces and clean-in-place (CIP) access typically outrank a marginal gain in metres-per-minute.
Why a Chain Conveyor (and Not a Belt) on a Pharma Line
Chain conveyors carry 20-50 kg/m loads on tabletop or mat-top chain at 5-30 m/min on pharma accumulation, feeding blister lines, cartoners and case packers; enclosed drag chain conveyors move powder and granulate through 50-300 mm tubes at 1-15 m³/h, well inside the conveying family [S2]. Compared with modular belt conveyors, chain designs survive higher side loads, tolerate elevation changes up to 15-20° with cleated flights, and shed lubrication only at the conveyor chain pin/roller interface — easier to seal away from the product zone.
The pharma-edge over belts shows in three numbers: the chain's contact surface can be specified in FDA 21 CFR (or EU 10/2011) compliant UHMW or acetal rather than fabric-reinforced PU/PVC; a 316 stainless frame tolerates 1-2% NaOH / HNO₃ wash at 60-80 °C; and the drive sits behind an IP65 housing with V2A/V4A cable glands, so wash-down jets do not reach the motor. For multipath layouts, cable drag chains carry the power and signal runs to the drive, keeping the wash zone free of loose conduit.
Spec Gates Before Vendor
Frame and contact material: 304 stainless for dry/wet non-corrosive zones; 316/316L for chloride-bearing wash chemistry. Contact surfaces in UHMW-PE, acetal (POM-C) or glass-filled PP, with FDA or EU 10/2011 food-contact documentation on the chain supplier's datasheet [S1]. Pin/roller material at 300-series stainless or hardened 400-series, lubricated with H1 food-grade grease, not mineral oil.
Drive and controls: 0.18-2.2 kW gearmotor at 230/400 V 50 Hz or 24 VDC for mobile skids; IP65 minimum, IP66 for direct-hose zones. Variable-frequency drive (VFD) for soft-start and reversing. Encoder or proximity on the tail for slug tracking and jam detection. Emergency stop and guard interlock per ISO 13849-1 PL c minimum on the operator side.
Cleanability and access: tool-less chain release, take-up with a clear scale, sloped frame to drain at 1-2° toward the floor, crevice-free welds (grind and electropolish to Ra ≤ 0.8 µm on product-contact welds), and lift-off guarding rather than fixed panels so a QA team can swab the chain without a screwdriver marathon. Working width 100-600 mm covers most blister and cartoning lanes; 800-1200 mm enters case-packer and palletising side.
Comparing the Main Options
Four chain-conveyor families compete on a pharma line; pick by product state and zoning, not by habit. [S1]
Tabletop / mat-top chain conveyor — flat chain in 82.5 mm or 114.3 mm pitch, transfers and accumulates rigid packs (vials, blister cards, cartons) at 5-30 m/min with up to 60° side transfers. Best for cartoning, labelling, end-of-line. Limitations: open chain above 60 °C wash chemistry, so not the choice for hot CIP.
Magnetic chain conveyor — rare-earth magnets in the chain hold ferrous parts (closure components, fill needles) through curves; used in fill-finish sub-assemblies. Excludes aluminium and stainless trim.
Enclosed drag chain conveyor — dual-strand silent chain or paddle chain inside a 100-300 mm tube; suited for powders, granules and tablet scrap, 1-15 m³/h on gentle 0-15° inclines. Fully sealed for dust containment and outdoor sections; specify a side-access door for clean-out.
Modular plastic-belt chain (Belt-Pro/Intralox type) — polypropylene or acetal modules on a roller chain spine; the throughput of a belt with the hinge of a chain. Hygienic by default; the limiting factor is the sprocket and shaft seals under wash-down.
Who It Is For / Who It Is Not For
It is for OEM machine builders, contract packers, and primary/secondary processing plants in solid dose, fill-finish and medical-device assembly, who need hygienic, validated, repeatable transport of rigid packs, closures and powder. A typical DirectIndustry pharma filter returns 171 product entries, with vendors including A.C. Horn and comparable stainless specialists [S1].
It is not for ultra-fine powder at high tonnage (use a pneumatic/vacuum conveyor), not for soft or unstable totes on long inclines (use a roller or cleated belt), and not for any zone where the cleaning regime destroys 300-series stainless or the chosen polymer. Buyers who only need 1-2 m of transfer between two existing machines usually win with a tabletop kit from a belt-conveyor integrator rather than a bespoke chain build.
Standards and Validation Hooks
Pharma conveyor builds are typically specified to FDA 21 CFR (food-contact materials), EU Regulation 10/2011 (plastic food-contact), and EHEDG Doc. 2 / Doc. 8 hygienic-design guidelines; electrical enclosures to IEC 60079 for any ATEX zoned area, and to NEMA 4X / IP66 for direct-hose wash zones. Drives and guards reference ISO 13849-1 and the relevant regional electrical code. Always ask the vendor for the food-contact declaration, the surface-finish certificate, and the documented CIP recipe the conveyor was designed against — three short documents that resolve most FAT and SAT disputes. [S2]
Vendor Map and Sourcing Reality
DirectIndustry's pharma-conveyor filter currently lists 72 companies and 171 products, with 304/316 stainless specialists such as A.C. Horn among the named suppliers [S1]. For larger or multimodal systems, OEM clusters in northern Italy, southern Germany and eastern China cover stainless fabrication, gearmotor integration and control-panel build in one supply contract. Bespoke pharma conveyors typically run 6-10 weeks for a 1-3 m tabletop section, and 10-14 weeks for a 5-15 m enclosed drag system; the tail end of that window is usually documentation, not fabrication.
For broader conveyor sourcing context across belt, roller and chain families, the Belt Conveyor Suppliers 2026 OEM cluster guide maps UK integrators and Chinese OEM hubs on spec-buying levers, and the Roller Conveyor selection guide is the natural companion when chain needs to hand off to gravity or powered roller accumulation. Final QA gating still runs through surface-finish documentation, food-contact declarations and a FAT plan that mirrors the SAT — sign those off before a frame ever leaves the crate.