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Magnetic Drives

Excitation can also be suppHed by an electromagnetic exciter that uses a rectified, pulsed a-c power supply, or a-c supply to an apposed electromagnet/permanent magnet drive. These units operate at very short strokes and frequencies of 50 to 60 Hz. Although designed primarily as feeders, they are occasionally used as short conveyors. [Pg.160]

Eermanent magnets for both the internal and external rotors, there is ss heat to the pumped fluid than with canned-motor pumps. Some canned-motor pumps have fully pressure-rated outer shells, which enclose the canned motor others don t. With magnetic-drive pumps, containment of leakage through the can to the outer shell can be a... [Pg.2309]

Properly installed and maintained, sealless pumps, both canned and magnetic-drive, offer an economical and safe way to minimize hazards and leaks of hazardous hquids. [Pg.2310]

Chemical Process Magnetic Drive Pump 2x3x8 1780 RPM ... [Pg.89]

There are trade-offs for magnetic drive and canned pumps versus centrifugal pumps with double-mechanical seals. The former have no seals to leak, but need active interlocks to prevent high temperature for temperature sensitive materials. Similarly, diaphragm pumps, that have... [Pg.76]

Figure 3-1A. Sealless Magnetic Drive Centrifugal Pump, no seals, no leakage, no coupling. Chemical resistance depends on materials of construction. See Table 3-2. (By permission, LaBour Pump Co.)... Figure 3-1A. Sealless Magnetic Drive Centrifugal Pump, no seals, no leakage, no coupling. Chemical resistance depends on materials of construction. See Table 3-2. (By permission, LaBour Pump Co.)...
Doolin, J. H, and F. M, Teasdale, Sealless Magnetic-Drive Pumps Stronger than Ever, Chem.. Eng., V. 97, No. 8, 1990. [Pg.223]

Karassik, I.J., When to Maintain Centrifugal Pumps, Hydrocarbon Processing, V. 72. No. 4, April 1993, p. lOL Nasr, A., Extending the Life of Magnetic-Drive Pumps, Chemical Engineering, V. 98, No. 10, October 1991, p. 159. [Pg.223]

The importance of constant or variable speed will influence the type of motor, motor-gear, motor-belt, or motor-magnetic drive combination. [Pg.654]

Variations in required speed or speed increase or decrease from the driver may be handled by gear boxes, belt or chain drive, magnetic drive, magnetic or fluid couplings, or variable-speed motors. [Pg.654]

Nasr, A., Extending the Life of Magnetic-Drive Pumps, Chemical Engineering, V. 98, No. 10, October 1991, p. 159. [Pg.223]

Reactor Design. The continuous polymerization reactions in this investigation were performed in a 50 ml pyrex glass reactor. The mixing mechanism utilized two mixing impellers and a Chemco magnet-drive mechanism. [Pg.298]

Fig. 4.22. Reaction cell 1 - ZnO sensor 2 - evaporator of silver atoms 3 shutter used to terminate the beam of Ag atoms 4 - collimating apertures 5 an aperture used for pumping the cell out 6 - magnet 7 - magnetic drive for a shutter 8 - getter 9 — vacuum-measuring tube iO, 11 - electrodes 12 - thermocouple. Fig. 4.22. Reaction cell 1 - ZnO sensor 2 - evaporator of silver atoms 3 shutter used to terminate the beam of Ag atoms 4 - collimating apertures 5 an aperture used for pumping the cell out 6 - magnet 7 - magnetic drive for a shutter 8 - getter 9 — vacuum-measuring tube iO, 11 - electrodes 12 - thermocouple.
Stirring can be achieved simply using a magnetic stirrer bar (steel is not magnetic). If more agitation is needed, perhaps due to a viscous solution or a higher volume cell, packless magnetic drives and stirrers exist. Materials can be... [Pg.140]

Bill Magnetic drive viscous loss VISC LOSS N 13 kW... [Pg.196]

B023 Magnetic drive power monitor M DRV MON c 1 A Low amp relay B Power monitor system Z other... [Pg.196]

The power needs for MEMS devices are diverse— and batteries may not be the best choice to provide power to systems based on various types of MEMS drives. For example, magnetic drives operate at less than 1 V, but they require generating hundreds of milliamperes, which becomes a difficult challenge for batteries sized on the subcentimeter scale. The required micro- to nanoampere current levels for electrostatic and piezoelectric MEMS are feasible for batteries, but the tens to hundreds of volts that are needed will present difficulties for batteries with nominal voltages of 3 V. However, there may be a niche for batteries that would be used to power 10— 15 V drives. [Pg.226]

Charged to a one liter Hastelloy-C autoclave (Autoclave Engineer), provided with a magnet-drive stirrer, a mixture of methanol (5.4 mole), methylacetate (3.5mole), methyliodide (350 mmole), nickel iodide (40 mmole), lithium iodide ( 380 mmole) and tetraphenyl tin (130 mmole). [Pg.75]

Permanent-magnet drives for pumps and stirrers are increasingly being used in high-pressure technology [22,23]. The containment shell of the magnet drive, in contrast to canned motors, must take up the full pressure-difference and must have appropriately thick walls. [Pg.163]

A small reactor for the much higher pressure of 250 MPa and up to 300°C is shown in Fig. 4.3-26. The capacity of the shrinked vessel is only 100 ml. It is equipped with a fast -running stirrer, a magnetic drive, and an electric heater. The reactor is suitable also for polymerization reactions [39]. [Pg.229]

Properly installed and maintained, seal-less pumps, especially magnetic drive pumps,... [Pg.94]

See other pages where Magnetic Drives is mentioned: [Pg.203]    [Pg.298]    [Pg.299]    [Pg.2309]    [Pg.2309]    [Pg.2310]    [Pg.2310]    [Pg.62]    [Pg.62]    [Pg.30]    [Pg.223]    [Pg.453]    [Pg.223]    [Pg.304]    [Pg.148]    [Pg.148]    [Pg.362]    [Pg.101]    [Pg.102]    [Pg.152]    [Pg.537]    [Pg.196]    [Pg.496]    [Pg.203]    [Pg.89]    [Pg.226]    [Pg.94]   
See also in sourсe #XX -- [ Pg.14 ]

See also in sourсe #XX -- [ Pg.222 ]

See also in sourсe #XX -- [ Pg.14 ]

See also in sourсe #XX -- [ Pg.1286 ]



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