Sealless Magnetic Drive Pumps

Magnetic Drive Pump Overview

Roth offers sealless magnetically driven pumps, which require an NPSHr of only 1 ft. (0.30m) FULL CURVE. These pumps can produce any level of differential pressure to 1500 ft (457m) (this pressure is 900ft (274m) greater than centrifugal pumps) and capacities from 4 to 180 GPM (0.91 to 40m3/hr).

Construction includes non-magnetic stainless steel or Hastalloy C parts for improved corrosion resistance and improved performance by reducing eddy currents. All bearing surfaces are provided with grooves to provide constant lubrication. High discharge pressure provides sufficient margin above vapor pressure to insure the fluid being pumped stays in its liquid phase as it passes through the magnetic drive. If you have environmental concerns, consider this pump.

Features

Continuous pumping of liquids with the following characteristics is now possible with ZERO leakage.

Liquefied gases
Hazardous liquids
Toxic liquids
Caustic liquids
Liquids that react when released to the atmosphere

Primary containment with secondary control stops “errant emissions”.Hermetic seal between magnetic coupling and liquid end.

Static O’ring or gasket seal between containment shell and pump casing, no external dynamic shaft seal required.

Hastelloy C containment shell reduces hysteresis losses providing:

Reduced “eddy current” losses
Less heat generation
Lower power consumption
Higher torque capability

High pressure process liquid form the regenerative turbine stage assures liquid phase flush flow through the hydrodynamic bearings. This liquid phase flush flow provides cooling and lubrication for the (alpha grade silicon carbide) hydrodynamic bearings in the drive. Primary containment shell is self venting back to the supply vessel.

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Sealless Magnetic Drive Pumps