A chain conveyor is a material-handling line whose carrying element is a powered chain running on a track or in a trough, and selecting one is a function of payload mass, route geometry, atmosphere and maintenance access rather than a single headline spec [S3].
Three OEM line cards published on DirectIndustry and MHE between 2026-04-14 and 2026-06-27 — the MiniTec GKF horizontal modular conveyor [S1], the CONVOYNORT 1200 Series pneumatic monorail [S2], and the Materials Handling Equipment (MHE) drag chain line [S3] — cover the three working topologies a process engineer is most often asked to compare: positive-drive modular flat-top, overhead monorail, and en-masse drag.
Three Topologies, Three Working Envelopes
Modular flat-top chain conveyors such as the MiniTec GKF run on a horizontal segmented track built from the supplier's aluminium profile system, with each component field-replaceable and re-extendable; the GKF catalogue is organised around energy efficiency and maximum flexibility, with all components suitable for extensions, attachments or protective guards [S1]. This topology is the default for clean packaging, light assembly and accumulation duty where product must be carried on a flat top surface that can turn corners with a small radius.
Overhead monorail chain conveyors, exemplified by the CONVOYNORT 1200 Series, suspend the load beneath the track on hooks or cross beams. The 1200 Series specifies a 40 mm × 40 mm × 3 mm rail section, a chain pitch of 180 mm between forged load-receiving links, horizontal and vertical wheels with bearings on each link, and a maximum operating temperature of 250 °C; it carries 0.001 kg to 50 kg per hook and is offered with a pneumatic side-motor that can index or continuously rotate workpieces inside an ATEX-rated paint-booth area [S2]. Monorail is the right pick when the floor must stay clear, the route snakes through multiple workstations, or paint/finishing cells must be served without a floor-level conveyor.
Drag chain conveyors — the en-masse and simplex/duplex variants that MHE has built since 1927 — pull flights through a fully enclosed trough. The MHE line targets severe duty with wear-resistant alloys and custom drive components, and is specified to move large volumes of grain, cement, wood chips, siftings and ash, i.e. dry, free-flowing bulk in abrasive or corrosive atmospheres [S3]. Drag is the right pick when the product is a bulk solid, the line is mostly straight, and dust containment matters.
Chain Pitch, Speed and Payload Boundaries
Chain pitch sets the spacing at which loads can be attached or products carried, and it is the single number that links mechanical layout to control logic. The CONVOYNORT 1200 Series fixes pitch at 180 mm with forged load-receiving links on the same centres, and the chain is reused as the 2700 Series power-and-free conveyor [S2]. A 180 mm pitch constrains minimum product length on a monorail to roughly that dimension and dictates the cam/curve radius; it is also the resolution at which an indexing stop can release loads.
Payload is the next gate. The 1200 Series monorail is rated 0.001 kg to 50 kg per hook and is explicitly framed as a small-load conveyor, including a use case as a cardboard-box carrier [S2]. Modular flat-top conveyors typically handle unit loads in the same single-digit to low-tens-of-kilograms window, but their ceiling is set by chain tensile strength and the number of drive sprockets, not by a hook rating. Drag chain conveyors are unbounded on the low end (they move powder) but are usually specified for throughput in t/h, not per-unit mass.
Speed control diverges sharply between the two powered topologies. The 1200 Series chain speed is continuous with pneumatic speed variation or step-by-step, with rotation of the workpiece driven by a separate side pneumatic motor whose air supply is metered inside the ATEX zone [S2]. Modular flat-top conveyors such as the GKF are driven by a fixed motor gearbox sized to the line's length and accumulation pressure, with energy efficiency called out as a design focus on the OEM's 2026 product page [S1]. Drag chain conveyors are typically constant-speed, with throughput tuned by flight geometry and chain speed at the drive shaft.
Atmosphere, Temperature and Material Compatibility
Temperature ceiling is a hard boundary. The CONVOYNORT 1200 Series carries an explicit 250 °C maximum operating temperature [S2] — high enough for paint-booth and curing-oven interfaces, well above ambient assembly. Modular flat-top chain conveyors built on aluminium profile systems (the MiniTec GKF is built on the MiniTec profile system with a new push-fit profile designed for unlimited retention) [S1] are bounded by the polymer/steel flat-top chain specification, not the frame, and typical catalogue ratings sit well below 250 °C. Drag chain conveyors in the MHE catalogue are positioned for extreme temperatures, abrasion and corrosion through wear-resistant alloys and custom drive components [S3] — the trough, not the chain, is usually the high-temperature limit.
Hazardous-area operation is built into the monorail class: the 1200 Series speed variation is adjusted by the air control of the pneumatic motor inside the ATEX area of a paint booth [S2], which means the electric drive and the variable-speed element are kept out of the hazardous zone by design. Modular flat-top and drag chain conveyors are generally installed outside classified areas; if they must enter one, the certification burden falls on the drive and on any non-conductive static-dissipating components, not on the chain itself.
Material compatibility is largely about what touches the product. The GKF modular conveyor is described as combinable with image-processing, labelling and workplace-design modules [S1] — i.e. clean, dry, non-abrasive unit loads. The MHE drag chain line is built for abrasive bulk and uses wear-resistant alloys for chain and flights [S3]. For wet, sticky or chemically aggressive products, the selection must extend to chain material (e.g. stainless vs case-hardened), flight shape, and trough seal — a level the OEM catalogue pages do not always reach and that the specifier must confirm against the duty.
Route Geometry, Maintenance and Integration
Route geometry decides topology almost on its own. Overhead monorail is the only class that handles tight, three-dimensional paths with multiple rises and dips while leaving the floor clear; the 1200 Series is described as easily adapted to sinuous routings, with automatic load/unload possible via industrial robots [S2]. Modular flat-top conveyors handle horizontal and gentle-incline paths and small-radius curves, with the GKF segment-based design supporting field extensions and guarding retrofits [S1]. Drag chain conveyors are essentially straight runs; turns require intermediate transfers or two conveyors with a chute.
Maintenance access is a function of segment count and the OEM's parts policy. The MiniTec GKF is built around a push-fit profile that retains the modular system indefinitely, with all components specified as suitable for extensions, attachments or any necessary protective devices [S1] — a design that favours in-house rebuild and re-layout. The MHE offering goes the other way, positioning custom-engineered conveyors supported by a critical-response team for the operational issues that follow installation [S3]. The CONVOYNORT monorail sits between the two: forged chain links and pre-engineered rail sections, with the chain itself common to the powered 1200 Series and the 2700 power-and-free variant, simplifying spares holding [S2].
Integration scope is where selection errors are most often made. The GKF is sold as part of a wider MiniTec materials-handling, image-processing, labelling and workplace-design kit [S1]; choosing it locks the conveyor into a profile-and-accessory family. The 1200 Series is sold as a stand-alone monorail with optional pneumatic side-motor and robot load/unload, and the 2700 power-and-free upgrade path is a single line item rather than a re-spec [S2]. Drag chain conveyors from MHE are custom-engineered to the plant survey, with throughput, abrasion allowance and corrosion allowance defined jointly with the buyer's engineers [S3]. The integration envelope — kit-of-parts, configurable catalogue, or engineered-to-order — should be decided before the topology question.
Sourcing Signals and Comparable Adjacent Categories
The 2026 OEM activity is concentrated in two directions: clean-room modular conveyors with energy-efficiency framing (MiniTec GKF, May 2026 [S1]) and specialised overhead monorail for paint/finishing cells (CONVOYNORT 1200 Series, April 2026 [S2]). MHE's drag-chain line was re-emphasised in June 2026 around severe-duty bulk and custom engineering [S3]. A specifier comparing chain conveyors in 2026 should expect modular suppliers to lead on configurability and energy, monorail suppliers to lead on route flexibility and hazardous-area integration, and drag-chain suppliers to lead on material/alloy and abrasion.
For a duty that touches on a different power-transmission class, the selection logic for helical gear reducers overlaps with chain-conveyor drive sizing — the same ratio/torque/service-factor thought process applies to the conveyor's head-shaft gearbox. Where the conveyor is a kit-of-parts built on an aluminium profile, the same sourcing questions raised by the aluminium extrusion profile price and cost guide reappear at the frame level. The carrying element itself sits in the same family as the drive chains reviewed under conveyor chain and roller chain, and the broader class is covered in the chain conveyor reference page.
Trackable signals to watch in the next sourcing cycle: an OEM catalogue update from MiniTec pinning an energy-consumption figure (kWh per conveyed unit) onto the GKF page; a CONVOYNORT datasheet revision that adds an explicit IECEx variant alongside the ATEX pneumatic-motor reference for the 1200 Series; and an MHE case-history page quantifying alloy selection against a defined tonnage and abrasion index on a named bulk material. Any of those would tighten the next selection round; the absence of any of them by the next quarterly DirectIndustry refresh is the practical cue to push suppliers for the missing number before issuing a PO.