Hermetically Sealed Screw Pumps

MAG-Series

features a hermetically sealed containment shroud that replaces conventional dynamic shaft seals. Utilizing high-performance permanent magnets (Sm2Co17 / NdFeB), power is transmitted contact-free from the motor to the pump shaft. This design eliminates mechanical seal leaks, prevents oxygen ingress/coking, and provides maximum operational reliability at temperatures up to 300 °C (572 °F) and pressures up to 100 bar (1,450 psi).

  • The containment can completely isolates hazardous, toxic, or volatile media from the atmosphere, ensuring maximum environmental safety and ATEX compliance.

  • Engineered for extreme thermal stability up to 300 °C (572 °F) without seal degradation, ideal for high-temperature Heavy Fuel Oil (HFO), bitumen, and heat transfer fluids.

  • Contact-free magnetic transmission eliminates seal friction and wear, significantly extending ball bearing service life and reducing total life-cycle costs.

  • In case of sudden pump blockage or severe overload, the magnetic coupling automatically decouples, protecting the motor, drive system, and internal rotors from damage.

MAG-Series
Product Line Flange Diameter Containment Can Material Max. Pressure Operating Temp. Flow Rate (Capacity)
KRAL Mag-Drive (Sizes 5 – 42) DN 15 – DN 32 1.4301 St. Steel / Hastelloy C 16 – 63 bar Up to 300 °C 5.0 – 43.0 l/min
KRAL Mag-Drive (Sizes 55 – 118) DN 32 – DN 50 1.4301 St. Steel / Hastelloy C 16 – 63 bar Up to 300 °C 59.0 – 119.0 l/min
KRAL Mag-Drive (Sizes 160 – 275) DN 65 – DN 80 High-Strength Non-Magnetic Alloy 16 – 100 bar Up to 300 °C 166.0 – 282.0 l/min
KRAL Mag-Drive (Sizes 370 – 660) DN 100 – DN 150 High-Strength Non-Magnetic Alloy 16 – 100 bar Up to 300 °C 368.0 – 668.0 l/min
KRAL Mag-Drive (Sizes 850 – 2900) DN 150 – DN 250 Heavy-Duty Hermetic Shroud 16 – 100 bar Up to 300 °C 850.0 – 3,500.0 l/min
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