IMMERSIBLE MOTORS
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CORNELL PUMP COMPANY IMMERSIBLE the ImmersIble motor concept: Immersible motors are designed to be used in dry-pit applications where there is a possibility of flooding. Why take a submersible motor that was designed to run submerged 100% of the time and modify it to run in air 99% (or most of the time) and submerged 1% of the time (in case of a flood)? This seems backwards. The correct approach is to take a TEFC motor that is designed to run in air 100% of the time and adapt it to run submerged 1% of the time (in case of a flood). ImmersIble motor basIc desIgn: The basic design of the immersible pump/motor incorporates a premium efficient, inverter duty, P-Base or C-Face TEBC motor (totally enclosed, blower cooled). The motor, as the name implies, is totally enclosed and cooled by a blower on top of the motor. If the motor becomes submerged, the blower motor fan shuts down without affecting the main motor. While the motor is temporarily submerged, the media cools the motor just like a true submersible. A special conduit box is used to prevent water leakage into the motor. The motor is designed to prevent infiltration of water along the shaft and into the motor by utilizing a triple redundant sealing system, including a patented hydroseal design. The motor-end bell housing incorporates the ‘inverted cup’ principle, which traps an air bubble under the motor as water rises, thus keeping water away from the shaft seal. The shaft is fitted with a hydroseal, which expells water and further reduces the chance of water reaching the shaft seals. The Immersible motor can withstand up to 30 feet of submergence depth for a twoweek period. This exceeds the requirements of Immersible motors that is described in the industry standard “Index of Protection” IP67. Competitive designs only allow immersion of the motor for a period of time not exceeding 30 minutes at a submergence level of 3 ‘. Hardly enough time to deal with any kind of flooding emergency! CORNELL PUMP COMPANY // 16261 SE 130th AVE CLACKAMAS, OR 2013 © ALL RIGHTS RESERVED

FeatUres and beneFIts oF the ImmersIble motor • ease of maintenance: With the immersible motor, you can remove the motor and send it to the service shop. Meanwhile, replace it with any brand of motor that has a P-Base flange and you’re up and running. • service: Any motor shop can service the motor while submersibles require a certified submersible motor shop. • lower initial cost: Immersible motor installations do not require level controls and monitors, clean water, recirculating pump and/or the piping required with other types of dry pit submersibles. • lower operating cost: Motor...