Canned-motor pumps

FIG. 10-39 Canned -motor pump CouHesif of Chempump Division, Crane Co.)... 

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... 

Canned motor pumps are hermetically sealed to prevent emissions, leakage and motor damage. They require no conventional mechanical seal. 

Considered more reliable dian canned motor pumps (the containment shell is larger). 

The RCS illustrated in Figure 6.1-3 has two cold legs and one hot-leg for each of the two loops. Two canned-motor pumps are welded to the bottom of steam generator. A large pressurizer is attached to one of the hot legs. 

Canned motor pumps, 27 76-78 Canned pet foods, 70 849 Cannel coal, 6 705 Cannizzaro reaction, 72 110 solid-state crossed, 76 574 Cannon-Fenske viscometer, 27 728 Canoe fragrances, 75 360 Canonical ensemble, 7 33 Cans, two- and three-piece, 75 37-38. 

Fig. 6 Single-stage canned motor pump in Fig. 6.1 Illustration of canned-motor centri-...

The Dow Chemical Company recommends canned-motor pumps or magnetic-drive pumps for phosgene service. Phosgene is an example of an extremely hazardous material. These pumps should have a secondary containment such that failure of the can does not create a phosgene release. The secondary containment should meet pipe specifications for pressure or relieve to the scrubber system in the plant. These pumps must have automated block valves on the suction and discharge. Operation of these valves should be managed such that the thermal expansion does not damage the pump. 

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