DST Permanent Magnetic Systems

• Today leakage-free transmission is essential in process technology owing to environmental protection reasons. Highly toxic or aggressive media require hermetically sealed drives for pumps, agitators etc.
• DST ST permanent magnetic couplings optimally comply with the increasing environmental safety protection awareness. High torques can be safely transmitted wear-free through the vessel walls. If the maximum torque is exceeded, the torque transmission will be interrupted so that overload protection is always guaranteed.
• The well proven compact and high-performance magnetic couplings from DST apply rare earth magnets with excellent magnetic capacities.
• A significant performance advantage of the DST magnetic coupling is the freedom from wear in contrast to dynamic seals. This offers DST customers a competitive
advantage in a growing worldwide market with applications in the chemical, pharmaceutical and plastics industries.

Applications
• DST permanent magnetic couplings from DST using contact-free torque transmission are installed in the following areas:
• Chemical industry
• Pharmaceutical industry
• Food industry
• Biotechnology
• Industrial ovens
• Compressors
• Metering
• Batching
• Hydraulics

Materials
• The permanent magnetic coupling components in contact with the medium are selected from the following materials:
• 1.4571 / AISI 316 Ti
• Hastelloy
• Titanium
• 1.4435 / AISI 316 L
• 1.4539 / AISI 904
• 1.4301 / AISI 304
• 1.4462
• Plastic
 

Performance spectrum
• The broad spectrum of the DST standard construction range covers centrifugal pumps, rotating piston pumps, liquid ring pumps as well as agitators with differing torque ratings.
• Individual intermediate solutions are also available.
• Customer specific special solutions further down.

Construction of DST permanent magnetic coupling
• Outer ring
• Canister (the shell is in Hastelloy from size 75/10)
• Inner rotor completely encapsulated in AISI 316 Ti stainless steel
• Magnet material Sm² Co17*
 

Individual Solutions
• In direct cooperation with our customers the requirements for practical and specific coupling systems are individually evaluated.
• Thereafter the optimum cost/performance design is produced by DST using CAD systems.

Advantages sm2Co17 vs. NdFeB
• Very high energy product
• High coercivity (resistance to demagnetization)
• Stable at high temperatures up to 350° C
• Very corrosion resistant
 

Application Areas
• Conversion kits can be retro-fitted in many areas, for example: PU machines, Hydraulic applications
• DST conversion kits allow a combination with all major makes of pumps and drive motors.
• We will evaluate specific applications to produce a functional combination in order to utilise the advantages of “hermetically sealed” and “wear-free” in an optimum
way.
 

Silicium carbide - ceramic plain bearings
• Complete SSIC - Ceramic plain bearings are available as axial and radial types, predominantly for use in centrifugal pumps, combined with the DST standard permanent magnetic coupling.
 

Individual Solutions
• In direct cooperation with our customers the requirements for practical and specific coupling systems are individually evaluated.
• Thereafter the optimum cost/performance design is produced by DST using CAD systems.

Advantages sm2Co17 vs. NdFeB
• Very high energy product
• High coercivity (resistance to demagnetization)
• Stable at high temperatures up to 350° C
• Very corrosion resistant