The separation of liquid chamber/ atmosphere by means of an isolation shell is the best solution to pump aggressive, explosive and toxic liquids, hydrocarbons, heat transfer liquids and liquids difficult to seal.
The hermetic sealless is the best solution for the chemical, pharmaceutical and petrochemical industry.
A wide range of pumps covers the different performances.
M PUMPS CN MAG-M Magnetic drive pumps are sealless pumps.The static rear containment shell forms a closed system with hermetically sealed liquid end.
Applications
M PUMPS CN MAG-M Magnetic drive pumps are designed to improve people and plant safety. Especially when toxic, explosive or other dangerous liquids which react on contact with the atmosphere are handled. For all these services rear containment shell replaces double mechanical seals with external fluid reservoires and all the required control devices. CN MAG-M pumps offer therefore exceptional benefits to the chemical, petrochemical and allied industries.
Leakproof
CN MAG-M pumps have no glands, no seals no valves. Contrary to sealed centrifugal pumps, the hermetic construction of the CN MAG-M mag drive pump ensures a safe and leak free operation. Even under heavy-duty applications the pumps are extremely reliable.
The mag drive pumps have an extended choice of materials as well as a wide variety in models.
With its 100% zero leakage mag drive coupling the M PUMPS mag drives are your problem solvers in fluids and chemicals transfer.
Construction
M PUMPS CN MAG-M are a single stage volute casing pumps with closed impellers, back-pull-out design, with end suction and top discharge flange.
Sturdy legs are provided as standard for foot mounting on the base plate. Capacity and outer dimensions according to DIN 24256/ISO 2858.
ADVANTAGES M PUMPS CN MAG-M MAG DRIVE CENTRIFUGAL PUMPS
– Zero leakage (100% leak free)
– No mechanical seals or packed glands
– No external flushing systems
– Ensure a clean and safe operating environment, highly efficient
– Close couple and bare frame design
– No alignment required for closed couple version
ATEX
M PUMPS CN MAG-M mag drive pumps can be supplied to meet the requirements of Directive 94/9/EC, with ATEX certification II -/2 G cbk II C Tx for installation in potentially explosive atmospheres.
– Increased Mean Time Between Maintenance
NPSH-Conditions
As the internal circulation from discharge to suction, doesn’t rise temperature in the pumped liquid the handling of boiling liquids is possible without an increase of NPSH-required.
Balanced thrust loads
The thrust loads of the closed impellers are totally balanced by back vanes. Minimum residual forces that act in suction flange direction, are beared by strong silicon carbide, spring mounted, thrust bearings.
Outer ball bearings
The outer magnet shaft is fitted in generously dimensioned anti-friction bearings. The bearings are L10 rated for an average life in excess of 5 years. The oil bath is protected against atmosphere by a lip seal (labyrinth oil seal on request).The oil level is controlled by a constant level oiler and additionally by a bull’s eye sight glass.
Rear containment shell protection
The clearances between the outer rotating magnets and the stationary shell and between the rotating magnet holder and bearing bracket prevent magnets from rubbing on the rear containment shell in case of ball bearing failure.
Internal circulation, pressurized containment shell area
When the pump is operating the heat generated in the containment shell and inner magnet area by eddy currents, is dissipated by an internal flow circulation from the discharge directly behind the impeller.
The pressure is increased by the rear impeller back vanes circulation, and come back to discharge.
Second & Third level containment
The double containment shell consists of two isolation shells placed one into the other. The gap between the two shells allows an effective monitoring via a pressure gauge or a vacuum system.
Any alarm to interior or exterior shell will produce an alarm signal before any leakage occurs.
Epoxy primer and poly-acrylic enamel water-based painting for the best quality resistance linked to the environmental respect.
CF8M Pump Casing & Impeller High quality casting components.
Other materials:
– Hastelloy® C276,
– Incoloy®825,
– Duplex,
– Titanium, or others available on request.
Field assembling of the product lubricated bearing arrangement does not require special tools.
The bearing materials available are of three different types to provide the best solution for each application: Silicon Carbide (SSIC), Tungsten Carbide (TC).
The use of elastic rings reduces the sleeve bearing loads and the thrust bearing loads to a minimum, to guarantee many years of maintenance-free operation.
RWP QUICK CHANGE CARTRIDGE KIT
to guarantee an easy and fast maintenance.
Closed impeller statically and dynamically balanced. The axial thrusts are balanced by back vanes.
This allows the best balancing of axial trusts without regards of suction pressure.
Rear shell is made of one single piece, no welding, ellipsoidal profi le that has been studied to withstand higher pressures than the traditional one. Hastelloy® C276 is standard isolation shell material – providing a safe and effi cient solution – system pressure max 16 bar. Hybrid rear casing technology available for energy saving confi guration. Titanium Alloy is an upgrade when higher pressure ratings and increased efficiency are required. Double rear shell on request.
High power synchronous magnetic coupling designed by our technical office and with rare earth magnetic elements mechanically locked.
The high performance magnets can operate at liquid temperature of up to 662 °F (350 °C) without external cooling. Transmittable horsepower exceeds 520 kW / 700 HP.
Temperatures
Double slide bearings
The shaft is supported by two strong sleeve bearings The stationary bearings are located centrally in the common bearing housing, which ensure the proper alignment for a true running. Standard material is pure alpha grade – Syntherized Silicon Carbide, highly resistant against corrosion and wear.
The Silicon Carbide parts are elastically mounted by tolerance rings, beared and designed for temperatures up to +662 °F (+350 °C) without heat exchanger.
Higher temperature on request.
Sealing system with fl at gaskets prevents from leaking in the atmosphere – different materials available:
– Asbestos free (standard)
– PTFE
– Graphoil
– GYLON®
– Spiral Wound
– Other on request
TEMPERATURE
Double slide bearings
The shaft is supported by two strong sleeve bearings. The
stationary bearings are located centrally in the common bearing
housing, which ensure the proper alignment for a true running.
Standard material is pure alfa grade – Syntherized Silicon Carbide,
highly resistant against corrosion and wear.
The Silicon Carbide parts are elastically mounted by tolerance
rings, beared and designed for temperatures up to +662 °F (+350
°C) without heat exchanger.
Higher temperature on request.
Temperature control
Connections for resistant temperature detection elements, liquid and shell surface control are available as standard. Are also available on request monitoring devices for outer ball bearing .On request, a mechanical seal can be supplied in place of the lip seal. The mechanical seal separates the magnet area from the oil bath and atmosphere, and together with the closed bearing housing forms a third containment after the double containment shell.
