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Recent innovation in magnetic drive pump production
PECIAL FJUTURE
Recent innovation in magnetic drive pump production Rising safety standards, the pressure to cut operating costs andgeneral considerations about quality assurance are promoting the use ofplhstic-lined, magnetic drive pumps. Their fields of application range f+vm the transfer of extremely corrosive andpure medi& in the fine chemical andpharmaceutical industries through environmental engineering/waste disposal and cellulose bleaching, down to the recovery andprocessing of metal. Here follows a short look at what some of the industry’s leading innovatoxs arepromising.
m
Non-metallic
barrier can
(407 Nm) of torque and capable of transmitting 200 hp (149 kW) at 3600 rpm. Rotary positive displacement pumps are available with this can design to 2200 psig (152 bar) discharge pressure or flow rates to 900 gpm (3400 l/min).The high strength, thin wall design allows inner and outer magnet assemblies to operate across a smaller distance and thus transmit more torque than thicker walled cans. Imo says the units have proven very effective in handling isocyanate, a notoriously difficult-to-seal chemical. m
Low cost basic design
The reality that, for many plant operators, the operating conditions for process pumps lie in the mid to low range of difficulty, has prompted ITT Richter to develop a new, cheaper pump. The MDK series is a magnetic drive pump with a more simple design and therefore, a more reasonable price tag. Nevertheless, the MDK also has the essential safety features of a plastic-lined magnetic drive centrifugal pump, being hermetically tight, free from eddy currents, resistant to dry-running and of robust metal-reinforced overall design. The MDK was developed for media where stainless steels are not sufficiently corrosion-resistant, and as an alternative to pumps made of exotic metals (Hastelloy, Monel, titanium). The MDK plan is to guarantee lower initial investment costs and shorter delivery times. The single-part pump housing made of ductile cast iron is
Early this year, Imo Pump was awarded United States Patent 5 763 973 for the design and manufacture of a non-metallic barrier can for use on mag-drive pumps.The new can is produced using carbon fibre filament and epoxy resinThe fibre is wound in a specific pattern on a mandrel and the resulting can is then bonded to a stainless steel mounting flange.The can has a wall thickness less than 0.110 inches (2.8 mm) yet maintains both inside and outside diameter roundness under pressure. Suitable for operating pressures to 450 psig (3 1 bar) at temperatures to 400°F (232°C) the can is used on magnetic drive The MDK series makes mag-drive t&k-walled and seamlessly sealless pumps. It provides the technology more affordable. barrier between pumped liquid lined with fluoroplastic FEP or and the atmosphere. Inner and outer rotating mag- polypropylene PI? Pipes can be flange-mounted netic fields couple the drive motor to the pump directly without joints. The expansion ing elements allowing operation with no shaft pressure-bearing can is made of glass-fibre reinpenetration of the pump pressure envelope and, forced material. On the wetted side, a PFA lining thus, no shaft seal requirement. Being non-metalprotects against corrosion. This unit is free of lic, the can eliminates most eddy current losses metal and thus eddy currents, and therefore it resulting in higher efficiency operation and does not transfer heat into the medium being conreduced heat generation. veyed.This is an important reliability factor in The non-metallic can has been applied applications involving low flow rates or media with magnetic couplings rated at 300 ft-lbs almost at boiling point. And in general terms, the
WORLD PUMPS
SEPTEMBER
1999
PECIAL S _
FEATURJX
freedom from eddy currents results in an energy saving compared with pumps with metallic cans. The MDK is designed for an operating pressure of up to 16 bar and a temperature range of -60” to 120°C. As both corrosive and pure media can be pumped with the MDK, ideal applications are to be found in the chemical and petrochemical industries, in the pharmaceutical and food processing sectors, in cellulose and metal processing as well as in waste disposal and recycling. m
Advanced favourite
version of an old
The latest design of the established Global magdrive pump is now available from Verder Ltd, which it says continues the push for glandless pumps to become the standard, rather than the exception. Verder already offers mag-drive pumps from stock as standard but the latest innovations offer
even more flexibility.The new design features a modular rear casing (containment tube and magdrive assembly) built onto the already efficient hydraulic end. This not only aids manufacture, allowing a quicker service to customers but makes available all power options for a given size of pumps, with a simple switch in components. Each size of impeller casing now has only one back plate to which all sizes of magnetic coupling/containment tube can be fitted, rethinking what is traditionally a manufactured item with no flexibility. The modular approach cuts the
PECIAL FEATURE
component count required to cover all manufacturing options, reducing stock requirements and the cost of repair and downtime.The reduction of the number of components also eases machinery and welding process requirements and improves enhances tolerances.
m
Maximum
rating extended
Ingersoll-Dresser Pumps has broadened its CPXS range of magnetic drive, sealless chemical process pumps. Providing more solutions for leakage-free pumping, the number of drives in the CPXS range has been increased with the introduction of the new Model 150 drive.This extends the maximum drive rating to 45 kW at 2950 rpm with Neodymium magnets and 37 kW at 2950 rpm with Samarium Cobalt magnets. The increased torque has also resulted in the addition of another pump size to the range, making 2 1 in all. The 2 1 sealless magnetic drive
IDP has extended the CPXS range of magnetic drive, sealless chemical process pumps.
pumps in the CPXS range cover capacities up to 300 m3/h (1325 gpm) and heads up to 100 m ?? (3300
WORLD PUMPS
SEPTEMBER
1999
Recent innovation in magnetic drive pump production Rising safety standards, the pressure to cut operating costs andgeneral considerations about quality assurance are promoting the use ofplhstic-lined, magnetic drive pumps. Their fields of application range f+vm the transfer of extremely corrosive andpure medi& in the fine chemical andpharmaceutical industries through environmental engineering/waste disposal and cellulose bleaching, down to the recovery andprocessing of metal. Here follows a short look at what some of the industry’s leading innovatoxs arepromising.
m
Non-metallic
barrier can
(407 Nm) of torque and capable of transmitting 200 hp (149 kW) at 3600 rpm. Rotary positive displacement pumps are available with this can design to 2200 psig (152 bar) discharge pressure or flow rates to 900 gpm (3400 l/min).The high strength, thin wall design allows inner and outer magnet assemblies to operate across a smaller distance and thus transmit more torque than thicker walled cans. Imo says the units have proven very effective in handling isocyanate, a notoriously difficult-to-seal chemical. m
Low cost basic design
The reality that, for many plant operators, the operating conditions for process pumps lie in the mid to low range of difficulty, has prompted ITT Richter to develop a new, cheaper pump. The MDK series is a magnetic drive pump with a more simple design and therefore, a more reasonable price tag. Nevertheless, the MDK also has the essential safety features of a plastic-lined magnetic drive centrifugal pump, being hermetically tight, free from eddy currents, resistant to dry-running and of robust metal-reinforced overall design. The MDK was developed for media where stainless steels are not sufficiently corrosion-resistant, and as an alternative to pumps made of exotic metals (Hastelloy, Monel, titanium). The MDK plan is to guarantee lower initial investment costs and shorter delivery times. The single-part pump housing made of ductile cast iron is
Early this year, Imo Pump was awarded United States Patent 5 763 973 for the design and manufacture of a non-metallic barrier can for use on mag-drive pumps.The new can is produced using carbon fibre filament and epoxy resinThe fibre is wound in a specific pattern on a mandrel and the resulting can is then bonded to a stainless steel mounting flange.The can has a wall thickness less than 0.110 inches (2.8 mm) yet maintains both inside and outside diameter roundness under pressure. Suitable for operating pressures to 450 psig (3 1 bar) at temperatures to 400°F (232°C) the can is used on magnetic drive The MDK series makes mag-drive t&k-walled and seamlessly sealless pumps. It provides the technology more affordable. barrier between pumped liquid lined with fluoroplastic FEP or and the atmosphere. Inner and outer rotating mag- polypropylene PI? Pipes can be flange-mounted netic fields couple the drive motor to the pump directly without joints. The expansion ing elements allowing operation with no shaft pressure-bearing can is made of glass-fibre reinpenetration of the pump pressure envelope and, forced material. On the wetted side, a PFA lining thus, no shaft seal requirement. Being non-metalprotects against corrosion. This unit is free of lic, the can eliminates most eddy current losses metal and thus eddy currents, and therefore it resulting in higher efficiency operation and does not transfer heat into the medium being conreduced heat generation. veyed.This is an important reliability factor in The non-metallic can has been applied applications involving low flow rates or media with magnetic couplings rated at 300 ft-lbs almost at boiling point. And in general terms, the
WORLD PUMPS
SEPTEMBER
1999
PECIAL S _
FEATURJX
freedom from eddy currents results in an energy saving compared with pumps with metallic cans. The MDK is designed for an operating pressure of up to 16 bar and a temperature range of -60” to 120°C. As both corrosive and pure media can be pumped with the MDK, ideal applications are to be found in the chemical and petrochemical industries, in the pharmaceutical and food processing sectors, in cellulose and metal processing as well as in waste disposal and recycling. m
Advanced favourite
version of an old
The latest design of the established Global magdrive pump is now available from Verder Ltd, which it says continues the push for glandless pumps to become the standard, rather than the exception. Verder already offers mag-drive pumps from stock as standard but the latest innovations offer
even more flexibility.The new design features a modular rear casing (containment tube and magdrive assembly) built onto the already efficient hydraulic end. This not only aids manufacture, allowing a quicker service to customers but makes available all power options for a given size of pumps, with a simple switch in components. Each size of impeller casing now has only one back plate to which all sizes of magnetic coupling/containment tube can be fitted, rethinking what is traditionally a manufactured item with no flexibility. The modular approach cuts the
PECIAL FEATURE
component count required to cover all manufacturing options, reducing stock requirements and the cost of repair and downtime.The reduction of the number of components also eases machinery and welding process requirements and improves enhances tolerances.
m
Maximum
rating extended
Ingersoll-Dresser Pumps has broadened its CPXS range of magnetic drive, sealless chemical process pumps. Providing more solutions for leakage-free pumping, the number of drives in the CPXS range has been increased with the introduction of the new Model 150 drive.This extends the maximum drive rating to 45 kW at 2950 rpm with Neodymium magnets and 37 kW at 2950 rpm with Samarium Cobalt magnets. The increased torque has also resulted in the addition of another pump size to the range, making 2 1 in all. The 2 1 sealless magnetic drive
IDP has extended the CPXS range of magnetic drive, sealless chemical process pumps.
pumps in the CPXS range cover capacities up to 300 m3/h (1325 gpm) and heads up to 100 m ?? (3300
WORLD PUMPS
SEPTEMBER
1999