Pharmaceutical & Healthcare

Drive solutions engineered forcleanroom and GMP-regulatedmanufacturing environments

Why motor selection matters in pharma

"Every component inside a GMP-classified area is a potential source of particulate, microbial, or chemical contamination. Equipment selection isn't just an engineering decision under EU GMP Annex 1 (2022), it is a documented part of your Contamination Control Strategy."

The 2022 revision of EU GMP Annex 1, in force since August 2023, raised the bar significantly for sterile manufacturing. Where earlier versions set prescriptive limits, the revised Annex requires a documented, facility-wide Contamination Control Strategy — a living framework that addresses every source of contamination, including equipment design and material selection. That means the motor driving your mixer, your filling head, or your conveyor system is no longer a background consideration. It belongs in the CCS.

Electric motors in cleanroom environments generate heat, shed particle contamination through brush wear or insulation breakdown, and require electrical infrastructure inside classified areas that complicates environmental control. Pneumatic air motors address each of those problems at the design level not through add-on enclosures or mitigation measures, but by operating on entirely different principles. No windings. No brushes. No heat-generating resistance. No contamination pathways that an oil-free compressed air supply does not already create.

Globe Airmotors are specified by process equipment OEMs and pharmaceutical engineering teams who have already worked through the alternatives. This page sets out what matters for your application: cleanroom grade compatibility, oil-free construction options, particle generation characteristics, and regulatory alignment.

APPlications

Where Globe air motors are specified across pharmaceutical manufacturing

From aseptic liquid filling to solid dosage tablet coating, pneumatic air motors power critical unit operations where electrical drives introduce contamination risks that cannot be adequately mitigated.

Aseptic & vial filling lines: Air motor drives for peristaltic pump heads, rotary piston fillers, and time-pressure filling systems on liquid parenteral lines. Motor units positioned outside the Grade A zone, with sealed drive penetrations through barrier systems conforming to Annex 1 RABS and isolator guidance. Grade b - grade c
Bulk solution mixing & compounding: Continuous duty agitation in bulk solution vessels during preparation, compounding, and hold phases. Pneumatic drives on mixer shafts eliminate electrical components from the vessel head-space in Grade C preparation areas which simplifies the cleaning validation scope and reducing the number of electrical items in the classified zone. Grade c - grade d
Tablet compression & granulation: Drive systems for granulator blades, conical mixers, and transfer conveyors in solid dosage manufacturing. Dust-loaded environments where electric motor windings accumulate API particulate over time — a contamination and cross-contamination risk that air motors, with their sealed construction and simpler cleaning profile, reduce substantially. grade d
Tablet coating & film coating pans: Variable-speed pan drives for film coating systems handling active coatings, enteric coatings, and modified release formulations. Air motor speed is adjusted by regulating inlet pressure providing continuous, stepless speed control across the coating run without electronics inside the coating room. Grade c - grade d
Slicing & portioning: Drive systems for auger fillers, powder dosing heads, and vibratory feed systems on lyophilised product and dry powder injection (DPI) filling lines. The non-sparking characteristic of air motors is particularly relevant in areas where micronised API powders may create combustible dust atmospheres a dual GMP and ATEX classification consideration. Grade b - grade c
Transfer & conveying systems: Pneumatic conveyor drives and roller conveyor systems moving intermediate product between classified areas. Air-powered drives eliminate the cable management and electrical conduit routing challenges that arise when electrical drives must cross cleanroom boundaries with different pressure differentials and classifications. Grade c - grade d

Why pneumatic

The case for air motors in pharmaceutical manufacturing

Six characteristics that make pneumatic air motors the preferred drive solution in GMP-regulated and cleanroom environment

Oil-Free Operation	Globe air motors are available in oil-free configurations, running on unlubricated compressed air supply. The FDA's cGMP guidance for aseptic processing states that compressed air released into a classified area must meet or exceed the particle and microbiological quality of that environment. An oil-free motor eliminates the lubricant vapour pathway entirely a contamination source that oil-lubricated drives require engineering controls to manage.
Low particle generation	Brushless, commutator-free construction means Globe air motors produce no carbon brush wear particles — one of the primary particle shedding mechanisms in DC electric motors installed in cleanroom equipment. For Grade B and C environments where particulate monitoring is continuous, removing a known particle generation source from your equipment specification directly reduces the contamination burden on your environmental monitoring programme.
No heat generation	Pneumatic air motors run cool under load; the only thermal input to the room is incidental from the motor housing surface, which is negligible at typical output levels. Unlike Electric motors that generate heat through resistive losses. Heat that disrupts the thermal uniformity cleanroom HVAC systems are validated to maintain. Uncontrolled heat sources inside classified areas affect airflow patterns, pressure differentials, and unidirectional flow integrity in Grade A and B zones.
Stainless steel construction for CIP and SIP	Pharmaceutical equipment in GMP-classified areas is subject to Clean-in-Place (CIP) and Steam-in-Place (SIP) protocols. Globe 316L stainless steel motor housings withstand the chemical cleaning agents, elevated temperatures, and steam sterillisation cycles used in pharmaceutical cleaning validation programs without the coating degradation, crevice formation, or corrosion that limits the service life of standard industrial motors in these conditions.
Simple, validated speed control	Output speed and torque on a pneumatic motor are governed by air supply pressure and flow that's measurable, reproducible, and straightforward to include in process validation documentation. No variable speed drive to qualify, no inverter firmware to validate, no electronic component requiring periodic calibration inside the classified area. For QA teams managing the process validation lifecycle under 21 CFR Part 211 and EU GMP, fewer qualified instruments means fewer re-validation events.
Overload protection	An air motor that encounters a mechanical overload simply stalls because it draws no additional air and generates no additional heat. It does not trip an electrical protection relay, shut down a control circuit, or require a reset procedure inside a classified area. On aseptic filling lines where a mid-batch shutdown triggers an investigation, a batch review, and potentially a batch rejection, eliminating motor-trip as a shutdown cause has a direct impact on yield and compliance cost.

The Results

EU GMP ANNEX 1 & ISO 14644

Cleanroom grade compatibility

Under EU GMP Annex 1, pharmaceutical cleanrooms are classified as Grade A through D based on particle concentration and microbiological limits. Globe air motors are compatible across the range, with specific construction options matched to each grade's requirements.

ISO Class 5 equivalent Critical / aseptic zone	ISO Class 5 equivalent Aseptic preparation background	ISO Class 7 equivalent Less critical processing step	ISO Class 8 equivalent Background / support areas
Open product, container, or closure directly exposed. Unidirectional airflow. Filling heads, stopper insertion, vial sealing. Air motor drives located outside the Grade A zone, with drive shafts penetrating the barrier where required.	Background enviroment for Grade A aseptic filling. Growing rooms, RABS serrounds, isolator interiors. Globe oil-free motors with stainless steel housing are compatible with Grade B instalations with different applications.	Preparation of solutions to be filtered, component preparation, and handling of materials before sterilisation. The most common zone for air motor-driven mixing, dispensing, and transfer equipment in sterile manufacturing facilities.	Component washing, equipment preparation, and support operations. Solid dosage manufacturing areas for tablets, capsules, and oral liquids often operate at Grade D or equivalent. Broad range of Globe motor configurations are compatible here.
External motor placement	Stainless steel / oil-free	Standard GMP-grade	Widest motor compatibility

ISO Class 5 equivalent

Critical / aseptic zone

ISO Class 5 equivalent

Aseptic preparation background

ISO Class 7 equivalent

Less critical processing step

ISO Class 8 equivalent

Background / support areas

Open product, container, or closure directly exposed. Unidirectional airflow. Filling heads, stopper insertion, vial sealing. Air motor drives located outside the Grade A zone, with drive shafts penetrating the barrier where required.

Background enviroment for Grade A aseptic filling. Growing rooms, RABS serrounds, isolator interiors. Globe oil-free motors with stainless steel housing are compatible with Grade B instalations with different applications.

Preparation of solutions to be filtered, component preparation, and handling of materials before sterilisation. The most common zone for air motor-driven mixing, dispensing, and transfer equipment in sterile manufacturing facilities.

Component washing, equipment preparation, and support operations. Solid dosage manufacturing areas for tablets, capsules, and oral liquids often operate at Grade D or equivalent. Broad range of Globe motor configurations are compatible here.

External motor placement

Stainless steel / oil-free

Standard GMP-grade

Widest motor compatibility

regulatory alignment

The regulatory framework your QA team is working to

Globe air motors are specified and documented to align with the regulatory requirements pharmaceutical QA, engineering, and validation teams are responsible for. This is the framework that governs equipment selection in your facility.

Regulation / Standard	Requirement relevant to motor selection	GLOBE airmotors
EU GMP Annex 1 2022	Mandatory Contamination Control Strategy (CCS) must address equipment as a contamination source. Equipment must be designed and positioned to minimise contamination risk in classified areas. RABS and isolator use should be considered in aseptic processing.	Oil-free, low particle generation motors. CCS-ready documentation on request.
FDA cGMP 21 CFR 211	Equipment must be of appropriate design, size, and construction for its intended use. Surfaces in contact with components or products must be non-reactive, non-additive, and non-absorptive. Compressed gas quality must meet or exceed ambient classification where released.	316L stainless steel contact surfaces. FDA-compatible seals. Oil-free operation documented.
ISO 14644 Cleanrooms	ISO 14644-1 defines particle concentration limits for ISO Class 5 through 9. Equipment installed in classified areas must not compromise particle or microbiological limits under operational conditions. ISO 14644-4 covers cleanroom design including equipment placement.	Brushless, low particle generation construction. Compatible Grade B to D, with external motor options for Grade A adjacency.
FDA Aseptic Guide 2004 / 2023	Compressed air used in aseptic filling must equal or exceed the air quality of the environment into which it is released. Oil in compressed air is an explicit contamination risk. Equipment minimising human intervention in the critical zone is preferred.	Oil-free motor configurations available. Compressed air supply documentation included with motor specification package.
PIC/S Annex 1 Harmonised	Pharmaceutical Inspection Co-operation Scheme) has adopted provisions aligned with EU GMP Annex 1, extending the Contamination Control Strategy requirement to non-EU member countries. Relevant for facilities exporting to EU markets or operating in PIC/S member states.	Annex 1-aligned documentation applies to PIC/S-regulated markets. No separate specification change required.