Leak-Free Magnetic Mixing for Critical Industrial Processes
Enggus® Magnetic Agitator Drives are engineered to provide hermetically sealed, maintenance-friendly, and contamination-free mixing solutions for demanding process industries. Utilising advanced permanent magnetic coupling technology, our Mag Drives transmit torque without any direct mechanical contact, eliminating conventional shaft seals and significantly reducing the risk of leakage, wear, and product contamination. This design improves process safety, enhances equipment reliability, and minimises maintenance requirements.
Whether your application involves aggressive chemicals, pharmaceutical production, food processing, biotechnology, or high-pressure reactors, Enggus delivers dependable magnetic drive systems designed for long-term performance.
KEY FEATURES
Our magnetic drive stirrers use a rotating permanent-magnet coupling to transmit torque through a fully sealed canister wall — no packing gland, no mechanical shaft seal, no wear parts in contact with the process fluid.
- Zero-leakage, hermetically sealed design — no escape of toxic, flammable, or hazardous vapors; no ingress of air or moisture
- Torque range from 0.1 Nm to 1,000+ Nm across our standard series, with custom high-torque drives available on request
- Operates from full vacuum to high pressure — ideal for vacuum distillation, hydrogenation, and high-pressure autoclave reactions
- Wide material selection for wetted parts — SS316/1.4571, Hastelloy C-276/C-22, Titanium Grade 2/5, PEEK, PTFE-lined, and borosilicate glass canisters
- Overhead and bottom-mounted configurations to match your reactor geometry and process layout
- Customizable bearing options — dry-run capable, SSiC ceramic, or liquid-cooled bearings for optimal life and safety
- High-temperature stability — magnets rated for long service life with minimal flux degradation, even under continuous duty
- Dry-run safe & speed-monitoring compatible for unattended, long-duration process runs
OUR PRODUCT SERIES
Product Brochure
WHY A MAGNETIC DRIVE STIRRER
How It Works
A magnetic drive stirrer replaces the traditional mechanical shaft seal with a pair of permanent magnet rotors — one inside a fully welded, static canister, and one outside, connected to the motor. The outer magnet drives the inner magnet through the canister wall using magnetic force alone, with no physical shaft penetration through the vessel.
The result: the reactor stays completely sealed for the life of the process — no packing to tighten, no mechanical seal to replace, and no risk of product contamination from seal wear particles or lubricant ingress.
This makes magnetic drive stirrers the standard choice for:
- Toxic, flammable, or air-sensitive chemical reactions
- High-vacuum distillation where even minor seal leakage ruins the batch
- Pharmaceutical and fine-chemical processes requiring zero cross-contamination
- High-pressure hydrogenation and polymerization reactions
- Corrosive media requiring exotic wetted materials (Hastelloy, Titanium)
APPLICATIONS
WHERE OUR MAGNETIC DRIVE STIRRERS ARE USED
- Chemical & Petrochemical Reactors — hermetic mixing for hazardous and corrosive reactions
- Pharmaceutical & API Manufacturing — contamination-free agitation for GMP environments
- Glass Reactors & Lab-Scale Vessels — full-vacuum stirring for distillation and crystallization
- Autoclaves & High-Pressure Vessels — reliable torque transmission up to high bar ratings
- Pilot Plants & Process Development — flexible torque and material configurations for scale-up trials
- Food & Beverage Processing — bottom-mounted drives for hygienic, seal-free mixing
FAQ
What is a magnetic drive stirrer used for?
It’s used to mix or agitate liquids inside a sealed pressure vessel or reactor without any shaft penetrating the vessel wall, preventing leakage of hazardous or air-sensitive materials.
How much torque does a magnetic drive stirrer provide?
Torque ranges from under 1 Nm for lab-scale glass reactors up to 1,000+ Nm for industrial autoclaves, depending on the drive size and configuration.
Can a magnetic drive stirrer be used under full vacuum?
Yes. Because there’s no mechanical shaft seal, magnetic drive stirrers hold vacuum integrity far better than packed-gland or PTFE bush designs, making them standard for vacuum distillation.
What materials are magnetic drive stirrers available in?
Standard wetted parts are typically SS316/1.4571, with Hastelloy, Titanium, PEEK, and glass canisters available for corrosive or high-purity applications.
What's the difference between overhead and bottom-mounted magnetic drives?
Overhead drives mount on top of the reactor and suit high-speed lab and autoclave mixing; bottom-mounted drives suit hygienic, low-shear applications like food and pharma vessels.