Sealless Magnetic Drive Pumps

  • sealless mag drive pump
 
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 900 ft (274m) greater than centrifugal pumps) and capacities from 4 to 180 GPM (0.91 to 40m3/hr).

Construction includes non-magnetic stainless steel  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.

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

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

    • Features

    Primary liquid containment with secondary control to stop "errant emissions" by use of:

  • 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.
  • non-magnetic stainless steel containment shell reduces hysteresis losses providing:
  • Reduced "eddy current" losses
  • Less heat generation
  • Lower power consumption
  • Higher torque capability

High pressure process liquid from 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.

What is a magnetic drive pump?

Magnetic drive pumps, also known as mag drive pumps, are a type of pump used in industries where the handling of hazardous or corrosive fluids is required. These pumps have a unique design that eliminates the need for mechanical seals, which are prone to wear and tear and can lead to fluid leaks. Instead, mag drive pumps use a magnetic coupling to transfer power from the motor to the impeller, allowing the fluid to be transferred without any physical contact between the motor and the fluid.

The magnetic coupling consists of two sets of magnets, one set attached to the motor shaft and the other to the impeller. When the motor rotates, the magnetic field causes the impeller to rotate, thereby transferring the fluid through the pump. This design eliminates the need for a mechanical seal, making the pump leak-free and suitable for handling hazardous and corrosive fluids.

Mag drive pumps are ideal for handling fluids that are sensitive to contamination, as they prevent any external material from entering the fluid. They are also suitable for handling fluids at high temperatures and pressures, making them a popular choice in chemical and pharmaceutical industries. Additionally, mag drive pumps require less maintenance than traditional pumps with mechanical seals, making them more cost-effective in the long run.

When selecting a mag drive pump, it is essential to consider factors such as the type of fluid being transferred, the flow rate, and the required pressure. It is also crucial to ensure that the pump is made of the right materials to handle the specific fluid being transferred.

Mag drive pumps are a reliable and cost-effective option for handling hazardous and corrosive fluids. Their unique design eliminates the need for mechanical seals, making them leak-free and ideal for applications where contamination needs to be avoided. When selecting a mag drive pump, it is essential to consider factors such as the type of fluid being transferred and the required flow rate and pressure. With proper selection and maintenance, mag drive pumps can provide years of trouble-free operation.

Overall, magnetic drive pumps offer numerous advantages over traditional pumps, such as improved safety, reduced maintenance, and increased reliability, making them an excellent choice for handling hazardous and corrosive fluids in various industrial applications.

magnetic drive pump bulletinSealless Magnetic Drive Pumps Bulletin M105R3

Material of Construction:

Pump Case: Ductile Iron, 316 Stainless Steel, Hastelloy C

Standard Magnetic Can: Hastelloy C with 316 Duplex Stainless Steel flange for pressures up to 362 PSI/ 24.9 BAR.

High Efficiency Can: for applications requiring more than 25 HP/ 18.6 KW: 316 Stainless Steel (segmented primary containment shell) for pressures up to 660 PSI / 45.5 BAR.

Inner Bearings: Alpha Grade Silicon Carbide

Inner Rotor: 316 Duplex Stainless Steel and 316Ti Stainless Steel

Bearing Housing: 316 Duplex Stainless Steel Outer Rotor: Carbon Steel

Partial List of Roth Mag Drive Pump Applications

Model # Liquid Capacity GPM Suction Pressure PSIG Dicharge Pressure PSIG Differential Pressure PSI Specific Gravity TDH Feet Vapor Pressure PSIA Temp. F
MD5131SA 20Be Caustic 10 40 220 180.0 1.15 361.6 - 90
MDW5255DI 29% Aqueous Ammonia 26 0 238.5 238.5 0.95 580.0 29.92 90
MD5128ASA 70% Isoprene w/C5 H.C. 4.5 18 130 112.0 0.64 404.3 29.92 135-300
MD5141DI Anhydrous Ammonia 6 126 146 20.0 0.604 76.5 128 70
MDW5443DI Anhydrous Ammonia 22 24/45 219 194 0.64 700 - 11.3
MD5258SA Anhydrous Ammonia 22-50 48.6 71.2 24.4 0.63 97.2 226.7 104
MD5253SHC Anhydrous HF 21 10 266 256 0.96 616 22 70
MD2128SA Antioxidant 4 0 182 182 0.88 477.75 38.6 225-300
MD5441DI Butane & Propane 10-12.2 40 225 185 0.56 763.1 27 60
MD2133SA DCPAE 13 9.7 120 110.3 1.15 221.56 5 120
MDW5253SA Dilute Caustic & Water 20 110 320 210.0 1 485.1 1.7 120
MDW5857DI F152a 50 117.3 312.3 195.0 0.85 529.9 88 104
MD5147SI Genetron AZ-50 50 11.3 112.3 101.0 1.26 185.2 26 -65
MD5267DI Genetron AZ-50 162 11.3 112.3 101.0 1.26 185.2 26 -10
M5129SA HF 3 10 197 187 1.05 411.4 24.7 Amb.
M5229BSA HF 12 10 197 187 1.05 411.40 24.7 Amb.
MD5141SA Hydrocarbon w/28% H2S 2-3 100 130 30.0 0.55 126.0 257 48
MD5129SA Methyl Chloride 4 26.8/133 104 77.2 0.98/0.88 215 25.2/126.4 14/104
M5129SA Methyl Chloride 4 26.8/133 104 77.2 0.98/0.88 215 25.2/126.4 14/104
MD5253SA 3Propylene Oxide 3.2/14.5 0 50-99 50-99 0.83 275/140 1.2-17.8 Amb.
MDV5129BSA Styrene Condensate 3-12 -10 to -14 40 - 0.9 129-139 - 30
M5142SA Trimethyl Amines 18 4/22 140 136-118 0.65-0.62 483 19-37 40-90
MDW5143SA Vac. Dist. & Sour Water 28.9 5.4 112.3 106.9 0.95 270.5 - 150
M5229BSA VCM 9 25 263 238 0.95 578.72 40 Amb.
MDW5856SA Vinylidene Fluoride 30 248 760 512.0 0.854 1384.9 - 16
MD2133SA VOCL13 14.5 14.7 120 105.3 1.83 132.92 >1.0 100
MDW5128SA Water 5 0 50-75 50-75 1 174.0 14.7 140

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