Portable Demagnetizer PROMAG
PROMAG demagnetizer is a compact, mobile system designed for both demagnetization and magnetization of ferromagnetic parts. Whether applied to large steel workpieces or precision components requiring high accuracy, it delivers stable and reliable demagnetization results.
Applications
- Non-Destructive Testing (NDT): Particularly suitable for demagnetization needs in Magnetic Particle Testing (MT) and Eddy Current Testing (ET).
- Rotating Equipment: Demagnetization of shafts, bearing housings, and as pretreatment for electrical runout tests; effectively reduces shaft voltages caused by residual magnetism.
- Mechanical Engineering & Tool Manufacturing: Ideal for demagnetizing tools and mechanical components.
- Steel Trade & Supply Chain Industries: Ensures compliance with residual magnetism limits through effective demagnetization.
- Welding Processes: Used prior to welding as part of process preparation.
- Research & Development: Addresses a wide variety of specialized applications.
Key Technical Features
PROMAG combines high power with precise control, offering:
- High-Performance AC Demagnetization: Utilizes variable-frequency sinusoidal pulses to ensure superior demagnetization results.
- Automatic DC Demagnetization / Magnetization: Supports special application requirements.
- Lightweight Design: A fully integrated and portable unit weighing only ~24kg.
- Flexible Application: Equipped with flexible magnetic field cables to accommodate workpieces of different sizes and shapes.
- Flexible Magnetic Field Cable: Can be used for demagnetizing single parts or entire assemblies. It can be wrapped around a workpiece, laid flat in a loop, or positioned to reach difficult-to-access areas. Cable length and the number of turns can be adjusted to precisely control magnetic field strength.
- Optional Coil Extensions: In addition to the flexible cable, the PROMAG-70 is compatible with SSM coils and ISP pulse coils. For special requirements, custom-designed coils can be developed to match specific dimensions, field strengths, or distribution needs.
- Operator Training Services: To ensure safe and efficient equipment operation, we provide 1-2 day operator training, available either online via video conference or on-site at the customer’s facility.
Technical Features
- Low-Frequency Sinusoidal Pulse Demagnetization: Utilizes low-frequency sinusoidal pulses combined with precisely controlled magnetic field strength to effectively reduce eddy current effects and achieve deeper penetration into ferromagnetic materials.
- Progressive Frequency Technology: During sinusoidal pulse demagnetization, the frequency is gradually increased, delivering outstanding performance for small to medium-sized components and surface treatments.
- DC Field Reversal Demagnetization (New in 2025): Applies DC field reversal (decaying cycle) to generate deep magnetic flux within large workpieces, meeting the requirements of stringent technical standards.
- Adjustable DC Magnetic Field: Allows setting of field amplitude and polarity, enabling flux definition and magnetization for steel workpieces.
- Magnetic Symmetry Adjustment: Enables precise magnetic field tuning for specific areas, such as the ends of steel shafts.
Series Specifications
| Model | PROMAG-30 | PROMAG-70 |
|---|---|---|
| Electrical Connection | 1 × 200-240 VAC, 50/60 Hz, 16 A | 3 × 380-480 VAC, 50/60 Hz, 32 A |
| Max. Power | 6.5 kVA | 27.2 kVA |
| Dimensions (W × H × D) | 680 × 530 × 380 mm | 680 × 530 × 380 mm |
| Weight | ~24 kg | ~24 kg |
High Magnetic Flux: With a winding diameter of 500 mm, up to 30,000 AWdg can be achieved using 4 magnetic field cables and the P-70 (With P-30, approx. 17,000 AWdg).
System Features
- High-Precision AC Sinusoidal Pulse Demagnetization.
- DC Field Reversal Demagnetization.
- Excellent Current Distribution Repeatability with extensive on-site adjustment capability.
- Versatile Flexible Magnetic Field Cables: Adjustable in length, cross-section, and number of conductors.
- Compatible with SSM Series Coils and Custom Special Coils.
- Portable Design: Lightweight, impact-resistant plastic enclosure with wheels for easy mobility.
Example Applications
Demagnetization of drive shafts after magnetic particle testing
Demagnetization of steel rolls to avoid disturbing particle adhesion
Demagnetization of compressor crankshafts for safe assembly processes and increased product quality
Demagnetization of a steel construction before MIG/MAG welding process
PROMAG with magnetic field cables and SSM coil as universal solution for demagnetization of various parts
Demagnetizing equipment PROMAG with two magnetic field cables, adapter, and connection cable
Magnetic Field Device PROMAG-70
The device generates strong and precisely controlled magnetic fields in magnetic field cables, for the controlled magnetization or demagnetization of steel parts. By using a microprocessor-based control and power electronics, precisely adjustable and reproducible magnetic field sequences are made possible.
Technical Data
| Supply | 3 × 380-480 VAC, 50/60 Hz, 16-32 A (power reduced at 16 A) |
|---|---|
| Output Voltage | ~400 VAC |
| Repeatability of Current Profile | >99.5% (at 50% of maximum current) |
| Dimensions (W × H × D) | ~680 × 530 × 380 mm |
| Weight | ~24 kg (without power and magnetic field cables) |
| Mobility | Rollable case with pull-out handle |
Magnetic Field Cables
-
Different conductor cross sections and lengths (compromise between weight, handling, and heating):
- Magnetic field cable EK-L-15-11: Ø Cable 16 mm, Weight ~10 kg, Length 15 m
- Magnetic field cable EK-L-8-11
- Connection adapter EKK-ML-11
- Maximum theoretical field strength: With 4 × EK-L-15 and winding diameter 500 mm: approx. 90 kA/m (30,000 AW). (by a factor 1.5 lower, when using function magnetization)
- Extension of magnetic field cables by coupling
Other coil systems:
- Tunnel coils of the SSM series
- Special coils
Technological function sine field demagnetization:
- Low frequency sine wave pulse demagnetization with 1 Hz for high penetration depth
- Progressive frequency sine wave pulse for high precision on small and medium size parts
- Setting of all relevant process parameters (amplitude, pulse duration, rate of field increase and decrease etc.)
Technological function DC magnetization/demagnetization:
- Adjusting the polarity, amplitude and duration of the DC sequence
- DC field downcycling function (automatic function)
Technological function magnetic symmetry:
- Adjustment of the residual magnetism in fluxing direction
Typical Application Fields
- Non-Destructive Testing (MPI, ECT)
- Rotating equipment
- Mechanical engineering, tool manufacturing
- Steel industry, supply parts
- Welding
- R&D